1991 Mercruiser 3.0 won't start

pmbertsch

Recruit
Joined
Jul 27, 2020
Messages
1
Gauges work, cranks when I jump the relay. Nothing when I turn the ignition Key. The 50 amp breaker and 90 amp fuse are OK.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,317
Howdy
Need some more info.

Is this a new to you boat?

Turn the key to start and starter will not engage and crank?

Can jump the starter at solenoid but still will not start?

If above is correct them may have 2 issues.
See if there is 12V at the coil pos post when key is turned ON
If no 12V then may be the kill switch

Is the slave relay clicking when key is turned to start?
If not then may be the neutral safety switch
 
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