Join Date: Apr 2003
Location: Blairmorganville, Saskatchewan
What do the spark plugs and top of the piston look like? I don't know for sure, but I'll guess that the head uses inner and out o-rings instead of a head gasket. There would also be o-rings on the bottom of the head of the head bolts because they are in the water jacket. One loose head bolt shouldn't cause coolant to leak into the combustion chamber, but you will want to check all of them for proper torque. If you're getting coolant into the combustion chamber you should have white smoke billowing from the exhaust, and it should not prevent your engine from revving. Start by torquing everything down.
I don't believe your condition is caused by a coolant leak at the head. Is your condition a lean bog, or a rich bog? Is it electrical, meaning is something cutting the ignition as the throttle is opened, as in a throttle safety switch? (I'm familiar with the Cat TSS, but I don't know what, if anything, Skidoo uses) Is something physically preventing the carb slides from lifting?