65 horse johnson problem

A

asu72

Recruit
Joined
Mar 4, 2006
Messages
2
a friend hooked up his battery cables with reversed polarity. Now it cranks but won't fire. Did he fry his powerpack??
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: 65 horse johnson problem

65HP Johnsons were manufactured from around 1968 on up. Lots of years, models and differences. Which year was yours?<br /><br />Anyway, check the fuse and check under the flywheel.
 
WillyBWright

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: 65 horse johnson problem

If it has amplified ignition, yup. :( If it's CD ignition, then it should have no effect on spark :) except that he'll need a new voltage regulator for the battery to charge again.
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: 65 horse johnson problem

And if you don't find anything visually, disconnect the yellow wires running from the stator to the rectifier.<br /><br />If it starts then, the rectifier is bad. <br /><br />If the rectifier seems bad, don't even think about reconnecting it because if it shorts out inside it can ruin your stator.
 
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