yamaha

T

tiger24

Recruit
Joined
Aug 3, 2009
Messages
3
guys i have a 88 50 horsepower yamaha motor and did a compression test on all 3 cylinders and got 100 on first and 95 on second and 90 on third, is this good, the boat runs real good, just trying to get as much info as i can, thanks in advance for the replys
 
M

mphelle8vld

Petty Officer 1st Class
Joined
Aug 17, 2005
Messages
321
Re: yamaha

A leak-down test would be a better way to judge the health of your motor, personally I think it's fine. If you're worried about your numbers and you're using an automotive gauge, run the motor until warm, put it back on the trailer and pull the plugs for your test. Make sure the throttle plates are propped open and that you have a fully charged cranking battery. The numbers should come up. I have two of these and would only recommend changing the water pump impellor annually, they're great motors.
 
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