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'.
My 1990 Mercruiser 5.7 hydrolocked after being used this summer for 10-15 hours. There was about 2 quarts of water in the pan and when I pulled the spark plugs, water ran out of the rear two cylinders on the starboard side. I pulled a compression check and found low compression on these two...
