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Discussion Starter · #1 ·
Last winter my son and I completely rebuilt the engine and everything started up fine and ran great (my son cooked a cylinder, so we had it bored .010 over and had crank balanced and new piston and rings). However shortly after I ran into the following issue:
When the snowmobile starts it seems to run fine for 15 minutes or so and then just quits. It usually starts up right away and will run for about 15 - 20 seconds then quits again. It does this for about 12 - 15 times and then runs fine. I have never seen anything like this in all the years of snowmobiling. I replaced the plugs, wires and caps and no change. I don't think it's the coils because both sides stop sparking when it happens. I feel like it's electrical but at a loss right now. Any help would be greatly appreciated. Thanks in advance.
 
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