Hi All -
I went to buy a 18' Carolina Skiff with a 2002 Yamaha 115hp 2 stroke on the back. It sounded good on muffs and was clean as a whistle. However, when I did a compression test it was between 75-80 PSI across all 4 cylinders. This test was done after letting the motor run on muffs for about 5-10 minutes. The motor wasn't hot, only slightly warm. I did not touch the throttle. The temperature outside was around 55 degrees. The motor is oil injected and the plugs seemed to have a good bit of oil on them.
I didn't get a chance to water test it. The compression gauge looks like it's in good condition. My question is, 75-80 PSI sounds low, right? I know the saying "it should be within 10-15% on all cylinders." This one is but just a little concerned.
What are your thoughts? Thanks.
I went to buy a 18' Carolina Skiff with a 2002 Yamaha 115hp 2 stroke on the back. It sounded good on muffs and was clean as a whistle. However, when I did a compression test it was between 75-80 PSI across all 4 cylinders. This test was done after letting the motor run on muffs for about 5-10 minutes. The motor wasn't hot, only slightly warm. I did not touch the throttle. The temperature outside was around 55 degrees. The motor is oil injected and the plugs seemed to have a good bit of oil on them.
I didn't get a chance to water test it. The compression gauge looks like it's in good condition. My question is, 75-80 PSI sounds low, right? I know the saying "it should be within 10-15% on all cylinders." This one is but just a little concerned.
What are your thoughts? Thanks.
