Sort of depends on what engine you may have...Inside the following link, click on the links that mentions 'Where to Find Mercruiser Stern Drive and Engine serial numbers'...,
https://forums.iboats.com/threads/miscellaneous-mercruiser-information.323278/
In this case you might want to stay with SEI parts only because I do believe (not 100% certain though) over the years Merc had changed a design to the shift spool and it "might" tend to create a different challenge for installation purposes without proper documentation paperwork to follow along...
If the engine was overheating then depending on engine model you have and accessories installed on the engine, generally you'd also be hearing a warning horn sound off once the engine gets too hot usually at which is typically about 196 degrees or more.
Being your temp swing is probably from...
56296
--STUD, (.437-20 x 4.750), GIMBAL HOUSING TO TRANSOM PLATE
Item number 2, https://www.mercruiserparts.com/bam/subassembly/30872/2203/40
https://www.mercruiserparts.com/r-mr-alpha-one-transom-assembly-1983-1-1
Yes...Nice find ta79pr, should be item number 16, https://www.volvopenta.com/shop/999222/part-sections/54142860
^, Blake0192 Might want to check if # 28 & 29 is there too just for a reference point.
Also Item 30, https://www.volvopenta.com/shop/999222/part-sections/54160574
Do you or the better half do Ebay stuff? Try running the original merc part number 55989A8 through Ebay as it seems you "can" find some of them at a lower cost vs checking the new number 97-8M0030655.
The ones for $42.50 say afatermarket but i wouldn't trust the material used as that could...
Hi, there is a cotter pin retainer on the inside of the boat that goes around the rubber. Have you removed the cotter pin before pulling on the wires...
https://forums.iboats.com/threads/faq-for-mercury-mariner-outboards.447800/
40C ELTO
6E9-502151 -
1987
Though the year guide has the model year at 1987, running the serial number pops up a 40 ELPTO from 1989 that you ought to be able to use as a parts guide if needed...
0M071173 comes up as an MERCRUISER 5.7L ALPHA ENGINE ONLY model number 4311225N1.
https://www.crowleymarine.com/mercruiser/oem-parts/stern-drive/1998/4311225n1?mdl=IQCK0R&q=0M071173
That serial number should make the engine right around the 2002-03 ish era…
Maybe @Yegboats can confirm the year.
Being the starboard side then maybe it could also be the mercruiser shift cable bellows has torn apart or the mercruiser lower transom mounted anode bolt area is becoming an issue.
https://forums.iboats.com/threads/outdrive-transom-mount-bolts-loose-merc-alpha-1.176514/...
Is the stern drive in the full up or full down position right now? or in the middle somewhere?
If the trailer up button seems to work then the pump itself should be working fine, but maybe it's the trim up limit switch is set at a position that it won't allow the drive to trim up a bit more as...
