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502 merc multiport that I just replaced all rocker arms on due to one cracking.
Idles smooth. vibrates @ 1100rpm and up in or out of gear. Didnt even drive on water after rocker arms being replaced. Have ran in driveway and on trailer while lowered in water. any guesses on what it might be?
Hey guys, new to the forum since ive had some problems with my boat :)
502 Merc EFI... had 6 people in boat and a 23p prop(all i had for the weekend) so obviously it was hard to get on plane but i only had to get up a few times and thought i would be alright. When returning to dock i heard a...