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Old 10-29-2007
wnor wnor is offline
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I had the same problem as in Post #1 with my Yanmar 3GM: pressing the start button always caused the solenoid to click but energized the starter only about once in five tries. I replaced the solenoid, blah, blah, blah. The problem was as follows: The Yanmar wiring schematic calls for a white wire in the wiring harness from the start button to the solenoid. On my boat someone interrupted that wire and spliced in leads that led to a microswitch in the "all-in-one" throttle/transmission control. The idea was to prevent starts with the transmission in gear. A good idea, but poorly executed: the spliced wiring and microswitch were too wimpy to carry the current necessary to reliably drive the solenoid piston all the way home such that the starter contacts closed. I restored the wiring to Yanmar's specifications, and the engine now fires up every time the start button is pushed. HTH.
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