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    merc 115 OB, is it a short or long shaft?

    I have heard the terms "short" and "long" shaft/housing refering to lower unit drive shafts. How would I determine which my 1990 115 merc is? Is there a place where I can take a measurement, and if so where.
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    90' 115 merc 4 cyl, need prop info

    I am looking to buy a new prop, but was wondering what other years, engine models will have the same prop as far as mounting splines go as my 1990 mercury 115hp OB. Are there any mercruiser stern drives with the same spline pattern?<br />thanks,<br />h2o
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    Merc 115 water pump question

    This is sort of a continuation from my last question, but thought I would separate it from the other issues.<br />When I am running with the water muffs, should I only be seeing water exiting out of the telltail(as well as leaking around the muffs)? I am finding water coming out the exhaust, and...
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    90 merc 115 rebuild done, some remaining water Q's

    To all who have given me advise the last couple months, many, many thanks. After a complete rebuild (my first), I got my 1990 115hp Merc (4cyl) on the water for the first time Sunday and for the most part, everything ran great. I kept the speed down, so I don’t’ know what its like at WOT yet.<br...
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    merc 115 water pump access

    I am rebuilding my '90 merc 115 (4 cyl). I am waiting for parts for the power head rebuild, and thought that while I was waiting, I would rebuild my water pump. <br />The manual says that prior to removing the gear housing, to put the boat in forward gear, but since the power head is off, I...
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    stainless vs aluminum prop

    I've been thinking of investing in a stainless prop. I have run aluminum props on my run-about since I owned it and have been fairly happy with them, but I do a lot of river boating and once a year I hit a sand bar and snap a blade. A friend had a stainless version of the same size and pitch of...
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    does 115 Merc rebuild need new jets?

    I noticed a comment in one of the earlier posts regarding rejetting when an engine is over bored (hopefully not overboard) as part of a rebuild.<br />I am rebuilding my '90 Mercury 115 (4 cyl). 2 pistons are getting replaced and they are .020" oversized (per machinists suggestion). Per...
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    MERC PISTONS

    I am rebulding my 1990 115 merc after an over heat last summer. After pricing out pistons from dealer at $230 a pop, I am looking at after market options. Heres the kicker, according to factory manual, I don't have to rebore all cylinders if only 1 needs it because merc pistons for this engine...
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