I also agree that it could be corrosion with one of the start battery cables. But I also had a problem as described, and in my case, it was the starting switch/button which was failing. I replaced it with a cheap SeaDog switch which conveniently stocked locally. The SeaDog switch started exhibiting the same problem within 6 months. I replaced the switch with a better quality Cole Hearse switch and have been problem free for years.
- Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ > On Jul 10, 2018, at 7:31 AM, cnc-list-requ...@cnc-list.com wrote: > > Date: Tue, 10 Jul 2018 00:30:59 -0600 > From: Sam Salter <sam.c.sal...@gmail.com <mailto:sam.c.sal...@gmail.com>> > To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > Subject: Re: Stus-List Intermittent starting Yanmar 3GM > Message-ID: <cafe2e45-dcad-409b-9c6c-4a4f5f342...@gmail.com > <mailto:cafe2e45-dcad-409b-9c6c-4a4f5f342...@gmail.com>> > Content-Type: text/plain; charset="utf-8" > > Check the ground connection first, mounted to one of the flywheel cover > bolts. Clean it up and retighten. They corrode over time. > If that doesn?t fix it, I?d replace the thick battery to starter wires and > connectors. 36 years is a fair life for those electrical cables and they > corrode inside the insulation so it?s difficult to spot a problem. > I had the same problem a couple of years ago on my 2GM 20F and 4 new off the > shelf wires with ends from Canadian Tire solved the problem. (I know - not > tinned, but I sail in fresh water and another 36 years is all I?ll be needing > !) > > sam :-) > C&C 26 Liquorice > Ghost Lake Alberta > > > On Jul 9, 2018, at 7:33 PM, John and Maryann Read via CnC-List > <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote: > > There was a thread some time ago about intermittent starting of Yanmar > engines. Our OEM Yanmar 3GM ( now 36 years old) works just fine but is > occasionally exhibiting symptoms where the starter clicks when I push the > button for a few tries without turning over. The starter then turns over > after 2 or 3 clicks, engine starts right up and all is well. Batteries are > fine, cranking speed is fine. Seems like corrosion in the button or wiring?? > Can someone point me to the thread or advise the consensus of the fix? > > John and Maryann > Legacy III > 1982 C&C 34 > Noank, CT
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