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1987 Johnson GT 150

S

striperman70

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"Model #J150GTLCUR. This is my

"Model #J150GTLCUR. This is my situation.. It started with the rectifier going out so i replaced and 3 or 4 trips to the pond later my new rectifier looked as if a bomb went off inside, I replaced rectifier and stator, then on my 2nd outing one of the metal plates that are on the stator coils that the wires come out to connect to the power packs etc... come off and busted 2 of my fly-wheel magnets. Ok,new magnets are glued in, new stator and life is going great now.My question is what can make a stator and the rectifier go bad or burn up. I want to know what to look for and what to maintain to keep these very expensive parts in good working order,because my wallet will not survive another failure like this.. Thanks so much for any info and happy safe boating to all. Jeff (striperman70)"
 
the most common way for that t

the most common way for that to happed is usually hook battery up backwards or a direct short over heating the electrical.
 
"Striperman70, If your motor i

"Striperman70, If your motor is a 1987 and it has only gone out once thats not bad. I belive your motor has a 35amp alternator which from what I understand generates allot of heat. The rectifier gets really hot from that high amp output and over time (heat and electronics are not good friends) begins dripping brown goo from the coils and goes bad which in turn takes the regulator/rectifier with it. The magnets coming loose on the flywheel is also another common problem. My mechanic will not gurantee his work many times if he does not replace the regulator/rectifier without replacing the stator and vice versa. Those two parts also equal lots of $$$$$$$$. Good luck with your motor."
 
Oh and shawn is right. Hook up

Oh and shawn is right. Hook up the battery or battery charger backwards even for just a second will short the diodes out in the regulator/rectifier in a split second!!
 
"Jeff,

Anything that would

"Jeff,

Anything that would cause the voltage to soar could cause the rectifier to burn. A low battery, bad cable connections, an accessory that is drawing too much power, are just some of the possibilities.

Switching batteries while the engine is running could also damage the charging system.

A bad tach might also be something to consider.

Tony"
 
"Thanks for all the input guy&

"Thanks for all the input guy's... Tony my cranking battery was shot, the last time out the volt monitor on my depth finder/GPS alarmed with very low battery and was only showing 11.9-12.5 volts while running at full throttle, so with what you said about the battery i think this may have caused the problem but i am still going to check the tach. Thanks again for all the good advice. Jeff (striperman70)"
 
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