FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
Have a 97 Yamaha 80hp 2 stroke outboard that I purchased used. At the time of purchase all cylinders read 115 compression. First outing it ran great but on the second outing I noticed a loss in power. Took it to a mechanic and he said the top spark plug had water on it and the compression was...
