johntking1981
Recruit
- Joined
- Feb 26, 2015
- Messages
- 2
I have a 1986 115hp V4 Yamaha and when I take it out on the water it will idle fine and when I put throttle to it the boat comes on plane and then the motor looses power. It sounds to me like it floods. I changed the spark plugs and put 15gal of new gas in inboard tank, Carburetor is new so I do not suspect it. I went to check compression and was very upset. The motor had not been run (it was cold) and I disconnected all the spark plugs, installed my compression gauge and turned it over about 4-8 times. I got the following data. 60# 90# 60# 55#. I am not sure if I messed up the test or need to go look for a new motor. Seems to me it would be the piston rings, pistons, or really bad blown head gasket. Any thoughts on this would be awesome.