My '84 Catalina 27 inboard Yanmar diesel has three switches to start. Turn ignition key to on. Press spring loaded glow plug button to heat glow plug for 20 seconds Pull spring-loaded plunger starter switch to start. For some reason when I tried to start this spring when I push the glow plug button the starter starts cranking immediately. I disconnected the plunger starter switch in case it was stuck and the engine would still crank when I push the glow plug button. Could the key ignition switch be bypassing the glow plug? Any suggestions?
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What happens when you pull the starter switch? Does it activate the glow plugs? Could the wiring have been mistakenly reversed during another repair? I've got an 84 C27 with a Universal Diesel, and my set up is the same as you describe yours. I've never run into an issue--the push button switch operates the glow plugs and the pull switch operates the starter. I am at a loss as to how the push button could suddenly begin operating the starter. Randy
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