Thanks Mike - I had a full blown alarm but also had a bit of chirping at the "edge of rpm" when the issue would sound the alarm. Jotted down electrical connections as something else to look into as well. But not sure that explains why it would happen at lower rpms.
Sean > Subject: Re: Stus-List C&C 34 - 3GM30F oil pressure warning - theory > or solved? > Message-ID: > <cahiz4azgpngpgjttzvfhdkz8s+41_zdwtsuojuhm38ffvdy...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi Sean. I had the same "chirping" problem with my 2GM20F. My oil level > was fine. The ground on the sensor was good. So I replaced the sensor, > but still had the chirping. My mechanic came by and we put on a pressure > gauge...pressure was good! > > So, for now I'm just living with the chirping which only seems to happen at > certain rpm. However, I do check my oil level regularly!! > > Mike > Atacama 33mkii > Toronto > > On Mon, Jul 30, 2018, 4:20 PM SEAN CONNER via CnC-List, < > cnc-list@cnc-list.com> wrote: > > > Listers- > > After reading a bunch of old posts about oil pressure warnings, I wanted > > to share this scenario to see if anyone can impart any more wisdom about a > > theory, etc; Our C&C 34 has a 3GM30F with a couple of thousand hrs. > > Engine runs like a top..change oil, filters, etc. religiously Only issue is > > grey smoke on hard start.. Maybe a small puff of blue, which I understand > > is not that uncommon. No smoke when running under load and no other issues. > > The other day we motored for 1.5 hrs in flat seas and as we reduced RPM's > > the low oil pressure alarm sounded. Killed engine and checked oil- it was > > ~50% so added ~1/3L qt. Checked for oil in bilge, exhaust and water in oil > > and everything was fine. Restarted engine and had same issue. Decided to > > motor back to mooring at about 2,200 rpm. After ~30 min or so, started to > > hear a slight chirping from the alarm and when reduced rpm it seemed to go > > off at an even higher rpm (2,000 maybe?). Shut it down and sailed home for > > 2hrs. Started engine to get to mooring and alarm persisted, but seemed to > > happen at lower rpms (~1,200?). Came home, read up on the digests and > > figured out my troubleshooting plan. First step, replace oil pressure > > switch/sensor. > > > > Today, before replacing the sensor, I decided to start engine and do a > > more precise test on what rpm the alarm was sounded, but I could not > > recreate the issue (!?). Ran engine at 2,600 at mooring for ~15 min and no > > issue. Replaced the sensor anyway and everything seemed fine. > > > > So the question is, did I solve the problem with the new sensor or is > > there another theory that could explain these symptoms? I won't have time > > to run engine at higher rpms for an extended period for a few days, so was > > hoping to get a bit more educated on next steps if the issue resurfaces. > > Will keep the board posted on what I learn and appreciate any other insights > > Thanks > > > > Sean Conner/Ladyhawke > > _______________________________________________ > > > > 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 > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20180730/1e79ef0b/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > CnC-List mailing list > CnC-List@cnc-list.com > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > ------------------------------ > > End of CnC-List Digest, Vol 150, Issue 139 > ****************************************** _______________________________________________ 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
