1987 YAMAHA 150HP OUTBOAD Compressor, 90-99 PSI,

[mcgill]

HELLO


I HAVE A 1987 YAMAHA 150HP OUTBOAD I ATTACHED THE Comreption metter to each cli, and i am gett Compressor, 90-99 PSI,is this good ,ok or bad.i did not do a wet compretion test.

 

[robert graham]

Re: 1987 YAMAHA 150HP OUTBOAD Compressor, 90-99 PSI,

HELLO


I HAVE A 1987 YAMAHA 150HP OUTBOAD I ATTACHED THE Comreption metter to each cli, and i am gett Compressor, 90-99 PSI,is this good ,ok or bad.i did not do a wet compretion test.

If all the cylinders are pretty near(10%) the same and the motor is running fine, then you're probably good. Maybe run some Yamaha Ringfree de-carbon through the motor? Are you having any problems with this motor that prompted the compression test?

 

[mcgill]

Re: 1987 YAMAHA 150HP OUTBOAD Compressor, 90-99 PSI,

Hello'''


The motor will run good for 10 mui, then start to miss. soon it will stall out ,and you can not get it started untill it cools down. I replest all the igntion coils thay are the same one on it when it was built in 1987.