First a worg of gratitude for all the help in the past.
Last season the problem started and it didn't go away with a carburetor exchange or new plugs but it seemed to go away when I ran engine off of fresh gas from a jerry can. This season, I hand pumped all the gas out of the gas tank(used it in my car with no problem) and refilled the tank.
Engine has Pertronix electronic ignition (thanx MarineEngine Forum) and changed spark plugs last season.
Engine started right up and exhaust seemed slightly more than I rember last season but not heavy white or black. Warmed engine and then took out on lake. For 5 minutes it ran well and hit 30mph (previous max speed). Then it started happening again. The RPM just fell and I was able to keep the engine going by puuling back on the throttle and pushing gently forward. This rall in power repeated several times at times the engine cut out. Each time it restarted , occasionally requiring a partially open throttle to start. When I got back to the dock, I let the engine idle and several times it slowed to stop. With a slighlty higher idle speed and with the throttle open a little, there seemed to be occasional falls in RPM as well. No backfiring noted.
Any ideas??
Last season the problem started and it didn't go away with a carburetor exchange or new plugs but it seemed to go away when I ran engine off of fresh gas from a jerry can. This season, I hand pumped all the gas out of the gas tank(used it in my car with no problem) and refilled the tank.
Engine has Pertronix electronic ignition (thanx MarineEngine Forum) and changed spark plugs last season.
Engine started right up and exhaust seemed slightly more than I rember last season but not heavy white or black. Warmed engine and then took out on lake. For 5 minutes it ran well and hit 30mph (previous max speed). Then it started happening again. The RPM just fell and I was able to keep the engine going by puuling back on the throttle and pushing gently forward. This rall in power repeated several times at times the engine cut out. Each time it restarted , occasionally requiring a partially open throttle to start. When I got back to the dock, I let the engine idle and several times it slowed to stop. With a slighlty higher idle speed and with the throttle open a little, there seemed to be occasional falls in RPM as well. No backfiring noted.
Any ideas??