Logo

Engine Main Breaker

Mboss9

New member
Can anyone tell me where to locate the main engine breaker on my Merc 5.0 Thunderbolt engine? Thank you for any help.
 
stbd side near the slave solenoid up front or to the right rear of the carb where the slave solenoid is located.
Why do you suspect it?
 
Please provide serial number for this lump

Engine serial is OL345096

I suspect it because I can’t find it and that’s the last “easy” thing to do before I commit to a new starter. I tried to start up my boat the other day and the key broke the ignition free, key spun freely. Installed new ignition and now the solenoid just clicks. Everything else works, the instrument panel/blower/bilge. Just won’t fire, boat has always fired up with ease.
 
if the solenoid clicks trace the clicking sound, If you find it jump the 2 large lugs, motor should crank.If not, starter or starers solenoid is bad
 
if the solenoid clicks trace the clicking sound, If you find it jump the 2 large lugs, motor should crank.If not, starter or starers solenoid is bad

I jumped the two lugs as you described with no action. I can’t imagine that the starter went bad concurrent with the ignition switch breaking loose but I suppose that’s a possibility.

I’m still curious whether anyone can tell me where the engine breaker is?
 
in front of the engine stbs side just above the water sep filter or to the rear and to the right of the carb or throttle body
 
Back
Top