Nakoakapuu
New member
Hey all new here but need some help with my ad31 with 290dp-e. My engine overheats when I run over 3000 rpm. I swappped the outdrives and the overheating followed the leg. I have taken the outdrive apart 4 times checking different things. The exhaust is clear all the way through, I bypassed the leg and put in a thru hull water pickup. Like I said the problem follows the outdrive. I recently had one mechanic tell me to check the drive ratios because that is all they can think of next to check. Motor and drives were bought second hand so I'm working on that today. He also said to check if there is a stamp on the bearing housing under the zinc so I pulled both zincs and found the bad leg had been stamped M7-C not sure what this means. Any ideas would be greatly appreciated. thanks