RobertN
Super Member
I inherited by sorts a '73 Chrysler 14' trihull runabout with a 45hp Chrysler outboard to match. I have had it out a couple of times. The hull is sunfaded, but everything works. Except... the motor.
Twice I have taken it out on the local lake. After cruising atmaybe 3/4 throttle for 15 minutes or so, it will just cut out. The first time, let it sit for a few minutes while my son and fished, and then it fired up. Second time out, did similar, but when it finally fired, it barely ran. Got it back on the trailer, and pulled a spark plug. Lower cylinder looked ok, but the upper cylinder was fouled and getting a heavy crusted buildup.
Today, I checked compression. Lower cylinder was 125psi, but bumped to 155psi after a little squirt of oil. The upper cylinder was 90psi, but bumped up to 110 with a little squirt of oil.
It would seem a set of rings is in order. How hard would it be to put rings in that 2-cylinder motor?
Twice I have taken it out on the local lake. After cruising atmaybe 3/4 throttle for 15 minutes or so, it will just cut out. The first time, let it sit for a few minutes while my son and fished, and then it fired up. Second time out, did similar, but when it finally fired, it barely ran. Got it back on the trailer, and pulled a spark plug. Lower cylinder looked ok, but the upper cylinder was fouled and getting a heavy crusted buildup.
Today, I checked compression. Lower cylinder was 125psi, but bumped to 155psi after a little squirt of oil. The upper cylinder was 90psi, but bumped up to 110 with a little squirt of oil.
It would seem a set of rings is in order. How hard would it be to put rings in that 2-cylinder motor?