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2006 Merc 40 EFI won't start

52wrench

New member
Hi.
It ran fine a few weeks ago after I bought it. Started this morning at the dock then quit, I checked the kill switch and it was bad so I jumpered it. Still no go. I have narrowed it down to the HP fuel pump voltage supply. I am assuming I should have voltage at the connector on the VST with the key in the on position? I have no voltage either in the on position or when it is cranking. I checked the fuses on the front of the motor, they are fine but no voltage there either for both the fuel pump and ign coil circuit. The Smart data and the main relay/accessory circuits both have voltage. I don't have a service book for this motor yet so no wiring diagram. Are these two circuits supplied directly from the ign switch? When I go to start it I get the one beep. Hard to believe both the ign sw and kill sw would go bad at the same time. Thank you.
 
I was wondering about that so I did try it both ways and it still wouldn't fire. has to be the neutral switch in the control binnacle. Will find out today.
 
The ignition sw is worn. I went out this morning and had no beep with KOEO and no power at the motor. Got it running by working the key a few times. Time for a new ignition and kill sw.
 
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