Re: Need to rebuild 90 HP lower unit - Help
I replaced the broken driveshaft and all the bearings on my V6 150... Figured I had nothing to lose... I had to make up some "special" tools, took some head scratching, but nothing was terrible.<br /><br />For the big 4" nut holding the bearing carrier, I used a blunt chisle tapping with a 3 lb hammer (not whacking hard). Move the chisle to other slots... came out fine, didn't wreck the nut. It didn't seem like it was too tight to start with. There are probably better ways to do it (I thought about making some kind of bar that fit across that nut), but this ugly way served the purpose.<br /><br />I made a bearing carrier puller from a couple of long threaded hooks that I hooked around the carrier... then put threaded ends through holes near the ends of about a 6" piece of bar stock. The stock sat across the prop shaft (across the prop nut). Tightening the nuts on the threaded hooks pulled the carrier back.<br /><br />I sacrificed a curved pry bar/nail puller, and ground the nail pulling end to fit into the slot for the shift linkage nut... The shifter rod fit between the 2 fingers (where the nail would normally slide in) and then I was able rotate the whole thing to take out that funny round nut.<br /><br />Lastly, I had to grind the sides off a wrench (make it thinner in profile) to get it to fit on the pinion nut properly. <br /><br />It was kind of an ongoing project for a couple weeks... I'd hit a snag then try and figure out what I needed to get the next piece off. A few skinned knuckles and brews later and it was back together. I think it's been 3 seasons of use since then.... still working fine. The parts still cost me ~$500, but it would've been around $2K if I had taken it into a shop. Timewise it was about a wash because the shops were so busy they wouldn't even commit to looking at it for a few weeks.<br /><br />Good luck..
