missourifishin
Recruit
- Joined
- Jul 4, 2003
- Messages
- 4
Model 75ELPTO Ser# OG739501. I have ordered some repair manuals from Seloc but they won't be here for several days so thought I might get some quick scoop from some of the the "good ole boys" and maybe gals 
who have been there and done that. My 1998, 75HP 2-stroke merc, 3 cylinder with power/trim/tilt etc, starts right up but runs and idles rough. Compression is 130 psi on all cylinders. Merc shifts in and out of gear ok and pumps water good. One mechanic told me his best quess was that it might need new main crankshaft and connecting rod bearings. Probably a dumb question but is there a way to determine if it needs new bearings without tearing it down? How hard would it be for a do it yourselfer/rookie to replace the bearings if this is the cause of trouble, as I would like to repair it myself if possible?<br />Thanks
who have been there and done that. My 1998, 75HP 2-stroke merc, 3 cylinder with power/trim/tilt etc, starts right up but runs and idles rough. Compression is 130 psi on all cylinders. Merc shifts in and out of gear ok and pumps water good. One mechanic told me his best quess was that it might need new main crankshaft and connecting rod bearings. Probably a dumb question but is there a way to determine if it needs new bearings without tearing it down? How hard would it be for a do it yourselfer/rookie to replace the bearings if this is the cause of trouble, as I would like to repair it myself if possible?<br />Thanks