I had a similar problem that was a result of a corroding ring terminal attached to the grounding stud on the engine, located on a bracket aft of the starter motor. (2gm) This is where the wiring harness grounds to the engine and thus the battery negative.
When I do any work on the boat I inspect/tighten all terminals etc and have found other issues in the making. My key switch is also wearing and requires a wiggle once in awhile to have the contacts engage. I will parallel-wire a hidden switch inside the boat to eliminate this issue. Hope this helps. Dave Sent from my iPhone > On Jul 10, 2018, at 8:50 AM, Dreuge <[email protected]> wrote: > > 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, [email protected] wrote: >> >> Date: Tue, 10 Jul 2018 00:30:59 -0600 >> From: Sam Salter <[email protected]> >> To: [email protected] >> Subject: Re: Stus-List Intermittent starting Yanmar 3GM >> Message-ID: <[email protected]> >> 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 >> <[email protected]> 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 >
_______________________________________________ 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
