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'.
I just look at one of my old merc manuals and it stated 25:1, variable throttle up and down, no WOT for the first few hours. Of course that is for a new motor, I would assume it would be the same on a rebuilt.