Yamaha 90 HP four stroke blows 30 amp fuses

A

andrewcmsu

Recruit
Joined
Oct 3, 2009
Messages
2
Hello,

I have a four stroke yamaha 90 HP. Underneath the fuse panel there is a 20 amp and 30 amp fuse. The 30 amp keeps blowing as soon as i hook the battery cable back up. Please Help???
 
R

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Yamaha 90 HP four stroke blows 30 amp fuses

are you sure your connecting the cables to the correct posts.
 
stylesabu

stylesabu

Master Chief Petty Officer
Joined
Aug 2, 2009
Messages
849
Re: Yamaha 90 HP four stroke blows 30 amp fuses

you most likely have a short. first disconnect positive cable from engine. leave negitive on. now reconnect positive to battery, if fuse pops the positive cable is shorted to ground.start looking for a nicked wire or cable.then you will have to remove each positive wire connection( starter,alt feed, trim feed ect) one at a time to find what is drawing excess load.
 
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rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Yamaha 90 HP four stroke blows 30 amp fuses

if your positive your hooking the cables up correctly here is the current path from the starter solinoid where the positive cable hooks up to the 30 amp fuse.
from the start solinoid there is a 10Ga wire running to the trim relay at the positive terminal on the trim realy it feeds the 30 amp fuse and then onto the starter relay.
either a wire is chafed or possibly the start relay has failed.
thats is all that is on,or from the factory, that 30 amp circuit.
remove the red wire from the start relay and try again if its still pops fuses look from the relay back to the starter solinoid.
if it does not blow one test the relay.
 
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