There is a fuse tucked up in the wire bundle that runs near the starter. It is I side a green snap-case. On my 3GM35F I ran through ALL of my connections before finally finding that this fuse case had opened up and was allowing the unsupported fuse to intermittently make and break contact. The case is made to clip shut and then be zip-tied. I replaced the lightly corroded fuse and zip-tied it shut. Haven't had a problem since...agout 1 year.
I knew it was a connection problem because with the key on I could grab the wire bundle/connections at the back of the engine and twist/wiggle them and get the alarm to sound. It was misleading cause I thought it was the connectors that were faulty. Turns out that the wiggle/twist movement was transmitted a short distance to the fuse case. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD Yanmar 3GM35F Josh Muckley On May 22, 2015 8:32 AM, "Tortuga via CnC-List" <cnc-list@cnc-list.com> wrote: > I’m having ignition problems with the 2QM15 engine in my C&C 30 mk1. > Normally, when the main switch is turned to on, the oil pressure alarm > sounds. Pressing the starter button starts the engine and the alarm stops. > > > This season, after a few successful starts, when I turned the main switch > on one day there was no alarm and nothing happened when I pressed the > starter. No cranking. Not a sound. My batteries spent the winter in my > basement and were fully charged. As well, shore power was plugged in and > the charger showed full charge on both batteries. > > > This happened once or twice last season but when I repeated the process > the engine started. > > > I assumed that the main switch was worn out and ordered a replacement > Yanmar switch from Rosborough Boats. It was my first dealing with them and > I was very impressed. Rob Manual had a new switch to me within a day. > > > I had carefully labelled and photographed the connections at the old > switch before removing it, but when I installed the new one it didn’t solve > my problem. When I keyed the switch on, I got a very weak sounding alarm > and pressing the starter button got no reaction. > > > I’m unskilled at tracing problems, so thought I’d ask for help. Thanks in > advance > > > Derek Kennedy > > Tortuga > > C&C 30 mk1 > > Ballantyne’s Cove, NS > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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