Re: testing Yamaha ignition voltage
I've had the engine 10 years and its been real solid until about a year ago when it started getting harder to start. Once started it ran fine all day. But in the last 6 months its started going flaky on me. Start ok, run 10 minutes and die and refuse to restart. <br /><br />At one time I sprayed some electronic parts cleaner up under the flywheel and spun it a few times and it started sparking at the plugs. Thought I had solved it, at least temporarily. Put everything together and it fired right up. Took it on the water and ran it 20 miles with no problems whatsoever. STored the boat two weeks, drug it South Padre the last week of Dec., it fired right up, we idled out of the marina but as soon as we jumped up on plane for about 5 seconds it died. It popped a few times while trying to restart but never would. Had no spark to any cylinder. Once since then in the driveway it started again, ran for 5 minutes and died and would not restart. <br /><br />I just received a new ESI 530 vom (same as Merc I think) to test voltages. Resistance on all the coils seemed with spec. How does a flywheel get demagnitized and can I check for that?