25 HP MERCURY, RUNNING ON ONE CYLINDER

SPARKPLUG

Recruit
Joined
Nov 27, 2005
Messages
2
I HAVE A 1989 25 HP. IT WAS RUNNING GOOD, THEN IT APPEARED TO BE RUNNING ON ONE CYLINDER. I CHECKED THE SPARK PLUGS, IT HAS GOOD COMPRESSION, AND GOOD SPARK THROUGH THE PLUGS WITH THEM REMOVED. COULD THIS BE THE SWITCH BOX,(POWER PACK) GOING BAD EVEN THOUGH I HAVE GOOD SPARK WITH ENGINE NOT RUNNING? I APPRECIATE ALL THE HELP I CAN GET.
 

Wiggy

Petty Officer 2nd Class
Joined
Aug 16, 2005
Messages
130
Re: 25 HP MERCURY, RUNNING ON ONE CYLINDER

I've had exactly the same problem and found out later on that it was actually the switch box that was playing up.<br /><br />But the experts here may say different, as I'm just a novice!
 

SPARKPLUG

Recruit
Joined
Nov 27, 2005
Messages
2
Re: 25 HP MERCURY, RUNNING ON ONE CYLINDER

Thanks for the information, Does anyone else have any input on the power pack?
 
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