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'.
Hi folks, first post from a newbie and novice boat owner
I have the Mariner III engine on a 6 meter RIB so there's plenty of power. However when I push up above 3.2k rpm for more than a minute the overheat alarm sounds so I figure it's time to look at the impeller.
WHen I look at the lower half...
