After several hours of my motor running great, the motor lost power. Felt like loss of a cylinder. The tach only reached 2000 RPM vs. the 5000 it had at top speed. When I got home I checked the compression of all cylinders. They all were around 130, which is good. I then checked for spark - all cylinders had spark. the plugs appeared black and fouled - but all of them looked the same. Before I set out I had replaced the plugs with the proper type and gap. I had also sprayed sea foam carb cleaner into the carb and addative to the gas. Like I said previously, it ran awesome for several hours, then took a crap. Do you think a jet in the carb got clogged possibly? or the electrical system fails under load? The motor starts and idles rough, but lacks power like a cylinder isnt firing. But how do I get spark then? maybe its a weak spark. I am very frustrated due to the recent blown cylinder on my Mercury. This is/was the replacement motor and only had it out 2 times and this happens. I can't win with these 2 strokes. any suggestions on where to go with this? It would be greatly appreciated. thanks, Mike
