Re: rebuild 90 i6 ????
Piece of Cake! Fresh water motor should just fall apart. IMHO, a LOT easier to work on than a V4. The hardest thing about the whole rebuild is dropping the crank, you can do it without special tools it just takes some patience and care. I suspend mine from the overhead and gently lower it in place with an engine hoist or comealong and guide the pistons in, one at a time.<br /><br />You can still get all the internal parts for these motors from Mercury and also the aftermarket, with maybe the exception of the crankshaft, which could be found used at any rate. I would hone out all cyl's, check for scoring and other problems, re-ring all cyl's not requiring new pistons and replace any bad pistons as necessary. <br /><br />You would only need to bore O.S. any cylinder that doesn't meet std specs; any others can stay standard and it won't affect balance or operation in any way.<br /><br />Replace the lower crank ball bearing, it's cheap at the auto parts store. Renew all other bearings as necessary upon inspection. Renew the rod bearings as a matter of course on any cyl on which you replace a piston. Renew seals o-rings, and gaskets.<br /><br />The 99.8 CI 90 is a good, torquey motor that doesn't have the top end grunt of the 115's, 140's, etc but is very economical and a great runner.<br /><br />BTW get the ser # off the motor and we can pin down the exact year and other spec's. If this motor turns out to be an older, 90 C.I. model, it may or may not be worth fixing depending on its internal condition and your desire!<br /><br />If you want to tie in with a bunch of other Inline Fanatics, check out this newsgroup which is dedicated to the Feeding and Care of all Towers of Power:<br /><br />news.kraits.org and the newsgroup is: bigweek.mercury-inlines. In Outlook Express use: tools/accounts/add/news and then follow the prompts.<br /><br />You'll be glad you did!<br /><br />HTH and See Ya on the Newsgroup...........ed
