Stus-List Yanmar 2gmf
Seem to be loosing some fuel. The tank is good. There is no leak from the tank to the primary filter. It then goes to the engine. No leak there. Pardon my ignorance but there is a round attachment with a gasket on the top that seems to be leaking. There are some small screws? bolts? holding it down. It seems to be oozing from there. Can I tighten them leaving everything together or do I need to take the mixing elbow off?Yanmar 2gmf.___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Stus-List Yanmar 2gmf
Bev, Your description of the fuel leak appears to be coming from the 'bleeder screw' on top of your small or secondary fuel filter .when this screw is backed off, which it is designed to do when bleeding air from the fuel system, fuel will ooze out...try gently tightening itcareful to not over tighten it.these screws are very sensitive to over tightening. I have no idea how a fuel leak and the mixing elbow can be related. Rob Abbott AZURA C&C 32 - 84 Halifax, N.S. On 2018-05-03 1:20 PM, Bev Parslow via CnC-List wrote: Seem to be loosing some fuel. The tank is good. There is no leak from the tank to the primary filter. It then goes to the engine. No leak there. Pardon my ignorance but there is a round attachment with a gasket on the top that seems to be leaking. There are some small screws? bolts? holding it down. It seems to be oozing from there. Can I tighten them leaving everything together or do I need to take the mixing elbow off? Yanmar 2gmf. ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2gmf
Could that ‘attachment’ be the engine fuel filter? You said ‘primary’ filter, is that the first one on the tank side? Mine has a big plastic Racor about a foot from the tank and then it is routed to a fuel pump mounted on the engine then to a small filter near the top of the engine, then to the high pressure pump and to the injectors. Make sense? Gary 2QM15 From: CnC-List On Behalf Of Bev Parslow via CnC-List Sent: Thursday, May 3, 2018 12:21 PM To: cnc-list@cnc-list.com Cc: Bev Parslow Subject: Stus-List Yanmar 2gmf Seem to be loosing some fuel. The tank is good. There is no leak from the tank to the primary filter. It then goes to the engine. No leak there. Pardon my ignorance but there is a round attachment with a gasket on the top that seems to be leaking. There are some small screws? bolts? holding it down. It seems to be oozing from there. Can I tighten them leaving everything together or do I need to take the mixing elbow off? Yanmar 2gmf. ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2gmf
Is it the fuel filter shown on page 83 of this: https://www.yanmarshop.com/Media/Default/Documents/1GM-2GM(F)-3GM(F)-3HM(F)%20Owners%20Manual%20(2J020A1279).pdf Joel On Thu, May 3, 2018 at 12:31 PM, Gary Nylander via CnC-List < cnc-list@cnc-list.com> wrote: > Could that ‘attachment’ be the engine fuel filter? You said ‘primary’ > filter, is that the first one on the tank side? Mine has a big plastic > Racor about a foot from the tank and then it is routed to a fuel pump > mounted on the engine then to a small filter near the top of the engine, > then to the high pressure pump and to the injectors. Make sense? > > > > Gary > > 2QM15 > > *From:* CnC-List *On Behalf Of *Bev > Parslow via CnC-List > *Sent:* Thursday, May 3, 2018 12:21 PM > *To:* cnc-list@cnc-list.com > *Cc:* Bev Parslow > *Subject:* Stus-List Yanmar 2gmf > > > > Seem to be loosing some fuel. The tank is good. There is no leak from the > tank to the primary filter. It then goes to the engine. No leak there. > Pardon my ignorance but there is a round attachment with a gasket on the > top that seems to be leaking. There are some small screws? bolts? holding > it down. It seems to be oozing from there. Can I tighten them leaving > everything together or do I need to take the mixing elbow off? > > Yanmar 2gmf. > > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > -- Joel 301 541 8551 ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2gmf
Send us a picture. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Thu, May 3, 2018, 12:21 PM Bev Parslow via CnC-List < cnc-list@cnc-list.com> wrote: > Seem to be loosing some fuel. The tank is good. There is no leak from the > tank to the primary filter. It then goes to the engine. No leak there. > Pardon my ignorance but there is a round attachment with a gasket on the > top that seems to be leaking. There are some small screws? bolts? holding > it down. It seems to be oozing from there. Can I tighten them leaving > everything together or do I need to take the mixing elbow off? > Yanmar 2gmf. > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2gmf
Hi Bev, I'm a bit confused by your description. By "round" attachment, do you mean cylindrical? My first thought is that this is your secondary fuel filter and the bleed nut is open. This filter is located on the front of the engine (trace the fuel line from the fuel pump). But then your reference to the mixing elbow is what got me confused. It is at the rear of the engine and there shouldn't be any fuel coming out anywhere near there (maybe your return fuel line has a leak??) Mike On Thu, May 3, 2018, 12:21 PM Bev Parslow via CnC-List, < cnc-list@cnc-list.com> wrote: > Seem to be loosing some fuel. The tank is good. There is no leak from the > tank to the primary filter. It then goes to the engine. No leak there. > Pardon my ignorance but there is a round attachment with a gasket on the > top that seems to be leaking. There are some small screws? bolts? holding > it down. It seems to be oozing from there. Can I tighten them leaving > everything together or do I need to take the mixing elbow off? > Yanmar 2gmf. > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Stus-List yanmar 2gmf in 29-2
I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still the problem persists somewhere. Is there an obvious place to start looking? ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List yanmar 2gmf in 29-2
Fuel leak into the engine? Or out? What signs and simptoms are you experiencing? Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Wed, Dec 26, 2018, 3:34 PM Bev Parslow via CnC-List < cnc-list@cnc-list.com> wrote: > I knew I had a fuel leak. Thought it was the lift pump so replaced it. > Still the problem persists somewhere. Is there an obvious place to start > looking? > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List yanmar 2gmf in 29-2
All your fuel lines are external so finding leaks should be a matter of running the motor and looking and feeling for moisture. Is fuel puddling under the motor? Copper sealing gaskets around banjo fittings should be replaced each time the bolt is loosened when you bleed the system. I keep a dozen on board for this reason. Feed lines to injectors also need to seat securely or fuel can leak. My 3HM had a leak from the filter housing right before the high pressure pump caused by over tightening the cap which cracked the thin aluminum casting. Any little thing can cause a leak. Chuck Gilchrest S/V Half Magic 1983 35 LF Padanaram MA Sent from my iPhone > On Dec 26, 2018, at 4:43 PM, Josh Muckley via CnC-List > wrote: > > Fuel leak into the engine? Or out? What signs and simptoms are you > experiencing? > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > >> On Wed, Dec 26, 2018, 3:34 PM Bev Parslow via CnC-List >> wrote: >> I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still >> the problem persists somewhere. Is there an obvious place to start looking? >> ___ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> > ___ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List yanmar 2gmf in 29-2
Fuel can leak from just about anywhere (:-). If you have a Racor filter, there are numerous places - mine was leaking from under the manual pump that is used for priming. Good luck. Marek 1994 C270 ”Legato”(with Perkins M20) Ottawa, ON From: CnC-List On Behalf Of Bev Parslow via CnC-List Sent: Wednesday, December 26, 2018 15:34 To: cnc-list@cnc-list.com Cc: Bev Parslow Subject: Stus-List yanmar 2gmf in 29-2 I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still the problem persists somewhere. Is there an obvious place to start looking? ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List yanmar 2gmf in 29-2
Hi Bev, I had a leak at the bleed screw gasket on a filter top. Being the filter between lift pump & injector pump. I verified the location by putting little wraps of paper towel around the system connections. The leak quickly discolours the paper towel, even before you can smell it. Cheers, Russ ex - 35 mk-1 At 12:34 PM 12/26/2018, you wrote: Content-Type: multipart/alternative; boundary="=_Part_2793283_850607002.1545856449296" Content-Length: 797 I knew I had a fuel leak. Thought it was the lift pump so replaced it. Still the problem persists somewhere. Is there an obvious place to start looking? ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List yanmar 2gmf in 29-2
In my video I discuss how I bleed my engine. I show JB weld stick on the HP injector bleed screw which is notorious for leaking/coming loose. As Russ says, the bleed screws on the filter also regularly leak so I plug those with JB weld as. The banjo bolt going into the lift pump is (IMO) slightly too long. It tends to bottom out and not provide good enough tension on the gaskets (copper or dowty). I've had the most success by doubling up the dowty washers on that particular bolt. Josh On Wed, Dec 26, 2018, 9:24 PM Russ & Melody via CnC-List < cnc-list@cnc-list.com> wrote: > > Hi Bev, > > I had a leak at the bleed screw gasket on a filter top. Being the > filter between lift pump & injector pump. > > I verified the location by putting little wraps of paper towel around > the system connections. The leak quickly discolours the paper towel, > even before you can smell it. > > Cheers, Russ > ex - 35 mk-1 > > At 12:34 PM 12/26/2018, you wrote: > >Content-Type: multipart/alternative; > > boundary="=_Part_2793283_850607002.1545856449296" > >Content-Length: 797 > > > >I knew I had a fuel leak. Thought it was the lift pump so replaced > >it. Still the problem persists somewhere. Is there an obvious place > >to start looking? > >___ > > > >Thanks everyone for supporting this list with your > >contributions. Each and every one is greatly appreciated. If you > >want to support the list - use PayPal to send contribution > >-- https://www.paypal.me/stumurray > > > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Stus-List Yanmar 2GMF losing power under load/RPMs drop
My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly well. So my theories are (in approximate order of suspicion from my novice perspective based on reading) Governor is faulty and needs adjustment Injector faulty Fuel pump issue Air/water in fuel (I think I've mostly ruled this out) ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
While this may not help you with your diesel issue, in the 36 years that I have owned my boat, I have never even tried to achieve RPMs above about 2800. I can achieve hull speed at 2600 RPMs and I generally cruise at 2400 RPM. Bob Boyer s/v Rainy Days C&C Landfall 38 (Hull # 230) (Presently in Baltimore for the summer) blog: dainyrays.blogspot.com email: dainyr...@icloud.com > On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List > wrote: > > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It > also appears to drift a bit while operating at a fixed throttle. Tied at the > dock forward seems to have more difficulty that reverse. I should be able to > get up to 3200-3400 RPM (and have been able to in recent times with no issue, > but I'm only getting to about 2500-2800. When I open the throttle wide it in > gear it initially goes to high RPMs and then drops back. I replaced the fuel > filter and the symptom remains the same. Any thoughts on what to look for and > approaches to debug? > > I've got the service manual and Don Casey's book on small engines, but > nothing is matching the symptoms in trouble shooting exactly well. > > So my theories are (in approximate order of suspicion from my novice > perspective based on reading) > > Governor is faulty and needs adjustment > Injector faulty > Fuel pump issue > Air/water in fuel (I think I've mostly ruled this out) > > > ___ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
Yeah, unfortunately that doesn't help, in forward gear I'm not even consistently hitting 2800 (more like 25-26). I've been able to get up to 3600 so something is definitely wrong and has changed for the worse. Also, prop and shaft look fine. I dove the boat while we were out and it all checks out. My boat hits hull speed around 28-29 in calm water. Gene Fodor s/v Hawk C&C 29 mk 2 On Sat, Aug 17, 2019 at 7:28 PM Robert Boyer wrote: > While this may not help you with your diesel issue, in the 36 years that I > have owned my boat, I have never even tried to achieve RPMs above about > 2800. I can achieve hull speed at 2600 RPMs and I generally cruise at 2400 > RPM. > > Bob Boyer > s/v Rainy Days > C&C Landfall 38 (Hull # 230) > (Presently in Baltimore for the summer) > blog: dainyrays.blogspot.com > email: dainyr...@icloud.com > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
Possibly the exhaust mixing elbow is getting clogged up? On Sat, Aug 17, 2019 at 9:20 PM Eugene Fodor via CnC-List < cnc-list@cnc-list.com> wrote: > Yeah, unfortunately that doesn't help, in forward gear I'm not even > consistently hitting 2800 (more like 25-26). I've been able to get up to > 3600 so something is definitely wrong and has changed for the worse. Also, > prop and shaft look fine. I dove the boat while we were out and it all > checks out. My boat hits hull speed around 28-29 in calm water. > > Gene Fodor > s/v Hawk > C&C 29 mk 2 > > On Sat, Aug 17, 2019 at 7:28 PM Robert Boyer wrote: > >> While this may not help you with your diesel issue, in the 36 years that >> I have owned my boat, I have never even tried to achieve RPMs above about >> 2800. I can achieve hull speed at 2600 RPMs and I generally cruise at 2400 >> RPM. >> >> Bob Boyer >> s/v Rainy Days >> C&C Landfall 38 (Hull # 230) >> (Presently in Baltimore for the summer) >> blog: dainyrays.blogspot.com >> email: dainyr...@icloud.com >> >> ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
It could be your mixing elbow. Remove it and see whether it's clogged. If yes, you can scrape it out, or have a radiator shop boil it out. Alan Bergen 35 Mk III Thirsty Rose City YC Portland, OR On Sat, Aug 17, 2019 at 5:14 PM Eugene Fodor via CnC-List < cnc-list@cnc-list.com> wrote: > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It > also appears to drift a bit while operating at a fixed throttle. Tied at > the dock forward seems to have more difficulty that reverse. I should be > able to get up to 3200-3400 RPM (and have been able to in recent times with > no issue, but I'm only getting to about 2500-2800. When I open the throttle > wide it in gear it initially goes to high RPMs and then drops back. I > replaced the fuel filter and the symptom remains the same. Any thoughts on > what to look for and approaches to debug? > > I've got the service manual and Don Casey's book on small engines, but > nothing is matching the symptoms in trouble shooting exactly well. > > So my theories are (in approximate order of suspicion from my novice > perspective based on reading) > > Governor is faulty and needs adjustment > Injector faulty > Fuel pump issue > Air/water in fuel (I think I've mostly ruled this out) > > > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.paypal.me_stumurray&d=DwICAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=9w3G7Cf8YfQnrjmtuNxwDJYr3JMv9f1pAfgAJ9xXYQQ&m=J7yR_wioiYdv_W5vUkFkJJXcELH0RCiI3zMJI2QdlOM&s=MzpJcmBodkNtQt6LCSMy7duJv46NR659jwqyhr-gyzo&e= > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
Any smoke while this is happening? From: CnC-List on behalf of Eugene Fodor via CnC-List Sent: August 17, 2019 5:13 PM To: cnc-list Cc: Eugene Fodor Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly well. So my theories are (in approximate order of suspicion from my novice perspective based on reading) Governor is faulty and needs adjustment Injector faulty Fuel pump issue Air/water in fuel (I think I've mostly ruled this out) ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
Exhaust elbow John and Maryann Legacy III 1982 C&C 34 Noank, CT From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Eugene Fodor via CnC-List Sent: Saturday, August 17, 2019 8:14 PM To: cnc-list Cc: Eugene Fodor Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly well. So my theories are (in approximate order of suspicion from my novice perspective based on reading) Governor is faulty and needs adjustment Injector faulty Fuel pump issue Air/water in fuel (I think I've mostly ruled this out) ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
Maybe group in the pickup tube? Try disconnecting it and blowing it outBill ColemanOn Aug 17, 2019 8:13 PM, Eugene Fodor via CnC-List wrote:My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly wellSo my theories are (in approximate order of suspicion from my novice perspective based on reading)Governor is faulty and needs adjustmentInjector faultyFuel pump issueAir/water in fuel (I think I've mostly ruled this out) ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
I recently had a similar issue where the engine would drop RPM's under load and eventaully stumble and die. It ended up being the fuel lift pump was on it's last legs and just not getting enough fuel to the high pressure pump once the fuel level in the tank was low enough not to just siphon. Instead of replacing with a yanmar part for $$$ I bought an electric fuel pump on amazon for under $20 and wired it into the key switch, works perfect and not more problems. hope that helps. ~Luke SV Zella 1985 35-3 On Sun, Aug 18, 2019 at 9:29 AM wrote: > Send CnC-List mailing list submissions to > cnc-list@cnc-list.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > or, via email, send a message with subject or body 'help' to > cnc-list-requ...@cnc-list.com > > You can reach the person managing the list at > cnc-list-ow...@cnc-list.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CnC-List digest..." > Today's Topics: > >1. Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor) >2. Re: Yanmar 2GMF losing power under load/RPMs drop (Robert Boyer) >3. Re: Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor) >4. Re: Yanmar 2GMF losing power under load/RPMs drop > (Jeff Helsdingen) >5. Re: Yanmar 2GMF losing power under load/RPMs drop (ALAN BERGEN) >6. Re: Yanmar 2GMF losing power under load/RPMs drop (Paul Baker) >7. Re: Yanmar 2GMF losing power under load/RPMs drop > (John and Maryann Read) >8. Re: Yanmar 2GMF losing power under load/RPMs drop (Bill) > > > > -- Forwarded message ------ > From: Eugene Fodor > To: cnc-list > Cc: > Bcc: > Date: Sat, 17 Aug 2019 19:13:31 -0500 > Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It > also appears to drift a bit while operating at a fixed throttle. Tied at > the dock forward seems to have more difficulty that reverse. I should be > able to get up to 3200-3400 RPM (and have been able to in recent times with > no issue, but I'm only getting to about 2500-2800. When I open the throttle > wide it in gear it initially goes to high RPMs and then drops back. I > replaced the fuel filter and the symptom remains the same. Any thoughts on > what to look for and approaches to debug? > > I've got the service manual and Don Casey's book on small engines, but > nothing is matching the symptoms in trouble shooting exactly well. > > So my theories are (in approximate order of suspicion from my novice > perspective based on reading) > > Governor is faulty and needs adjustment > Injector faulty > Fuel pump issue > Air/water in fuel (I think I've mostly ruled this out) > > > > > > -- Forwarded message -- > From: Robert Boyer > To: cnc-list@cnc-list.com > Cc: Eugene Fodor > Bcc: > Date: Sat, 17 Aug 2019 20:27:57 -0400 > Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop > While this may not help you with your diesel issue, in the 36 years that I > have owned my boat, I have never even tried to achieve RPMs above about > 2800. I can achieve hull speed at 2600 RPMs and I generally cruise at 2400 > RPM. > > Bob Boyer > s/v Rainy Days > C&C Landfall 38 (Hull # 230) > (Presently in Baltimore for the summer) > blog: dainyrays.blogspot.com > email: dainyr...@icloud.com > > > On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List < > cnc-list@cnc-list.com> wrote: > > > > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. > It also appears to drift a bit while operating at a fixed throttle. Tied at > the dock forward seems to have more difficulty that reverse. I should be > able to get up to 3200-3400 RPM (and have been able to in recent times with > no issue, but I'm only getting to about 2500-2800. When I open the throttle > wide it in gear it initially goes to high RPMs and then drops back. I > replaced the fuel filter and the symptom remains the same. Any thoughts on > what to look for and approaches to debug? > > > > I've got the service manual and Don Casey's book on small engines, but > nothing is matching the symptoms in trouble shooting exactly well. > > > > So my theories are (in approximate order of suspicion from my novice > perspective based on reading) > > > > Governor is faulty and needs adjustment > > Injector faulty > > Fuel pump issue > > Air/water in fuel (I think I've mostly ruled this
Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop
You may want to replace the lift pump.anyway and use the electric pump as backup and for bleeding. From: CnC-List on behalf of Luke Wolbrink via CnC-List Sent: Sunday, August 18, 2019 10:42:42 AM To: cnc-list@cnc-list.com Cc: Luke Wolbrink Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop I recently had a similar issue where the engine would drop RPM's under load and eventaully stumble and die. It ended up being the fuel lift pump was on it's last legs and just not getting enough fuel to the high pressure pump once the fuel level in the tank was low enough not to just siphon. Instead of replacing with a yanmar part for $$$ I bought an electric fuel pump on amazon for under $20 and wired it into the key switch, works perfect and not more problems. hope that helps. ~Luke SV Zella 1985 35-3 On Sun, Aug 18, 2019 at 9:29 AM mailto:cnc-list-requ...@cnc-list.com>> wrote: Send CnC-List mailing list submissions to cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> To subscribe or unsubscribe via the World Wide Web, visit http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com or, via email, send a message with subject or body 'help' to cnc-list-requ...@cnc-list.com<mailto:cnc-list-requ...@cnc-list.com> You can reach the person managing the list at cnc-list-ow...@cnc-list.com<mailto:cnc-list-ow...@cnc-list.com> When replying, please edit your Subject line so it is more specific than "Re: Contents of CnC-List digest..." Today's Topics: 1. Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor) 2. Re: Yanmar 2GMF losing power under load/RPMs drop (Robert Boyer) 3. Re: Yanmar 2GMF losing power under load/RPMs drop (Eugene Fodor) 4. Re: Yanmar 2GMF losing power under load/RPMs drop (Jeff Helsdingen) 5. Re: Yanmar 2GMF losing power under load/RPMs drop (ALAN BERGEN) 6. Re: Yanmar 2GMF losing power under load/RPMs drop (Paul Baker) 7. Re: Yanmar 2GMF losing power under load/RPMs drop (John and Maryann Read) 8. Re: Yanmar 2GMF losing power under load/RPMs drop (Bill) -- Forwarded message -- From: Eugene Fodor mailto:efo...@gmail.com>> To: cnc-list mailto:cnc-list@cnc-list.com>> Cc: Bcc: Date: Sat, 17 Aug 2019 19:13:31 -0500 Subject: Stus-List Yanmar 2GMF losing power under load/RPMs drop My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It also appears to drift a bit while operating at a fixed throttle. Tied at the dock forward seems to have more difficulty that reverse. I should be able to get up to 3200-3400 RPM (and have been able to in recent times with no issue, but I'm only getting to about 2500-2800. When I open the throttle wide it in gear it initially goes to high RPMs and then drops back. I replaced the fuel filter and the symptom remains the same. Any thoughts on what to look for and approaches to debug? I've got the service manual and Don Casey's book on small engines, but nothing is matching the symptoms in trouble shooting exactly well. So my theories are (in approximate order of suspicion from my novice perspective based on reading) Governor is faulty and needs adjustment Injector faulty Fuel pump issue Air/water in fuel (I think I've mostly ruled this out) -- Forwarded message -- From: Robert Boyer mailto:dainyr...@icloud.com>> To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: Eugene Fodor mailto:efo...@gmail.com>> Bcc: Date: Sat, 17 Aug 2019 20:27:57 -0400 Subject: Re: Stus-List Yanmar 2GMF losing power under load/RPMs drop While this may not help you with your diesel issue, in the 36 years that I have owned my boat, I have never even tried to achieve RPMs above about 2800. I can achieve hull speed at 2600 RPMs and I generally cruise at 2400 RPM. Bob Boyer s/v Rainy Days C&C Landfall 38 (Hull # 230) (Presently in Baltimore for the summer) blog: dainyrays.blogspot.com<http://dainyrays.blogspot.com> email: dainyr...@icloud.com<mailto:dainyr...@icloud.com> > On Aug 17, 2019, at 8:13 PM, Eugene Fodor via CnC-List > mailto:cnc-list@cnc-list.com>> wrote: > > My 2GMF 13HP on my 29 mk 2 is dropping RPMs at max throttle under load. It > also appears to drift a bit while operating at a fixed throttle. Tied at the > dock forward seems to have more difficulty that reverse. I should be able to > get up to 3200-3400 RPM (and have been able to in recent times with no issue, > but I'm only getting to about 2500-2800. When I open the throttle wide it in > gear it initially goes to high RPMs and then drops back. I replaced the fuel > filter and the symptom remains the same. Any thoughts on what to look for and > approaches to debug? > > I've got the service manual and Don Casey's book on