The motor has new plugs and new thermostat. The motor is used for watersking (20%) and the other 80% it is used for fishing with a trolling plate.<br />The last couple of times out fishing I trolled for about 3 hours but when I pulled the plate to start back the engine at about 3/4 throttle started to mis fire and I could only go 24 m/hr when full speed is 32 m/hr. I cut back on the throttle and made it back at 1/2 speed. Every time I tried to go past 3/4 throttle it started to miss. I let the boat sit for about an hour and started it back up and took it back out but the problem went away and I could not get it to do the same. The problem only seem to occur after trolling for long periods of time. The motor runs great any other time and the compression is fine.
