The accuracy of original tachs can be problematic. I’m pretty sure mine reads 4-500 rpm low. Near the top of the “ replace soon” list.
Tom Buscaglia S/V Alera 1990 C&C 37+/40 Vashon WA P 206.463.9200 C 305.409.3660 > On Jul 19, 2018, at 11:14 AM, cnc-list-requ...@cnc-list.com wrote: > > Message: 1 > Date: Thu, 19 Jul 2018 13:40:06 -0400 > From: Josh Muckley <muckl...@gmail.com> > To: "C&C List" <cnc-list@cnc-list.com> > Subject: Re: Stus-List Yanmar 3HM35F Exhaust riser/goose neck > Message-ID: > <ca+zacrbufau5rf1btanz7lf+ftbz4t03h-rhh-wxch4msm2...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > The Yanmar manual does have some guidance on page 44. > > https://drive.google.com/file/d/0B8pEh5lnvP1yenJtR1BxWjhqZGs/view?usp=drivesdk > > Josh > > On Thu, Jul 19, 2018, 10:47 AM Wade Glew via CnC-List <cnc-list@cnc-list.com> > wrote: > >> Ok. So my engine is a Yanmar 2GM20F. I find the vibration "sweet spot" for >> motoring is about 2200 rpm. Sounds like I should be pushing it harder >> trying to find a sweet spot at a higher rpm? I can't recall what the >> tachometer range is on my boat. I've also had someone mention pushing the >> engine up to a high rpm before shutting it down for what reason I don't >> know. Lastly, I notice truckers never shut off their engines immediately >> after a highway haul. Should I idle my engine before shutting down after a >> long motor. >> Thanks for your thoughts. >> Wade >> Oh Boy C&C 33 MKII >> >> On Thu, Jul 19, 2018, 09:22 Bruce Whitmore via CnC-List, < >> cnc-list@cnc-list.com> wrote: >> >>> Hello Wade, >>> >>> Essentially it means running the engine at relatively high RPMs (I've >>> seen the number to by 85% of full speed) whenever reasonable, in gear and >>> avoiding running the engine solely to charge the batteries. >>> >>> Bruce Whitmore >>> 1994 C&C 37/40+ "Astralis" >>> (847) 404-5092 (mobile) >>> bwhitm...@sbcglobal.net >>> >>> >>> ------------------------------ >>> *From:* Wade Glew via CnC-List <cnc-list@cnc-list.com> >>> *To:* cnc-list@cnc-list.com >>> *Cc:* Wade Glew <wadeg...@gmail.com> >>> *Sent:* Thursday, July 19, 2018 10:09 AM >>> *Subject:* Re: Stus-List Yanmar 3HM35F Exhaust riser/goose neck >>> >>> Hi Josh, >>> Being relatively new to the sailboat business can I please ask what you >>> mean by "keeping the engine load as high as possible" with regard to Soot >>> accumulation? >>> Wade >>> Oh Boy C&C 33 MKII >>> >>> On Sat, Jul 14, 2018, 16:24 Josh Muckley via CnC-List, < >>> cnc-list@cnc-list.com> wrote: >>> >>> I was pleasantly surprised, that after 5 years of use and no service, the >>> elbow was in no way clogged with soot. I believe this to be a result of >>> regulatory keeping the engine load as high as possible. >>> >>> Josh >>> >>>> On Sat, Jul 14, 2018, 5:11 PM Josh Muckley <muckl...@gmail.com> wrote: >>> >>> It is original to my ownership (6 years), who knows prior to that. >>> Replaced with "stainless" from ebay. >>> >>> Josh >>> >>>
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