90 HP Mercury 1989 3 Cyl - blown 20 amp fuse

Reg S

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Jul 29, 2011
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I have a 90HP Mercury 3 Cyl (1989) that started blowing the 20 amp fuse on the right side of the engine. When it blows you can't restart the motor or raise or lower it. It will keep running, but can't be restarted. You can run at trolling speed or up to 2500 rpm all day. Once you run at WOT the fuse blows. Is it possibly a bad battery that pulls too many amps to charge. I noticed that when fully charged with a trickle charger and left for a day, it takes most of a day to recharge it again.
 
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