The engine starts fine, runs fine at full throttle for 5 minutes, then the bottom cylinder drops out. Running like this for five minutes or so suddenly (and I mean at the click of a finger)jumps back into full power running on both clylners. This usually happens twice (sometimes more) and then the boat runs fine for the rest of the day. I have noted the bottom clylinder spark plug to be fouled. Three different boat mechanics have looked at the motor each returning a verdict that electronics check out OK and that the carbi needed a clean. The problem has never been fixed. Engine has behaved this way for about 15 years. I have rebuilt the carburetor, changed the coil on bad cylinder no changes to the problem. Whenever I put a timing light on the bad cylinder I cannot detect a missfire. <br />Could the prob be faulty reids. The right hand side feeds the bottom cylinder and is sealed from the left (which feeds the top cylinder).<br />If an electrical problem whats most likely stator, trigger, or powerpack.<br />Also the timing is set at 12 degrees BTDC at WOT is this correct? There is a major mark at 15 but I have never been game to advance further.<br />Any ideas out there! Please help.
