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  1. J

    outdrive swap with 3.0l Merc

    Re: outdrive swap with 3.0l Merc I got the splines out of the upper gear box. Here are some photos. I should just be able to slap on a fresh lower unit, replace transom seals and such and go boating right? What do you think?
  2. J

    outdrive swap with 3.0l Merc

    Forgive my ignorance regarding math and gear ratios. That being said... I have a 1990 merc 3.0 l with a Gen 1 out drive 1.94/1 ratio. I ran over a good size piece of lumber a couple weeks ago, and it looks like the vertical drive shaft sheared clean of the splines just below upper gear box...
  3. J

    Ran over a floating joist beam!

    Ran over a big piece of wood today at about 18 knots. Engine runs but prop won't engage fwd or reverse. You can also spin the prop by hand when in gear. S/s prop, merc 3.0 l. What did I do?
  4. J

    So How Many Times?

    So how many time exactly can you forget to raise the lower unit and drag it up the boat ramp before you have some serious problems? lol:eek: I know the answer is probably once, but I needed to put a p-touch on my steering wheel that says "Remember to raise the Lower unit idiot!" and I've...
  5. J

    3.0 L Mercruiser non-winterizing question(s)

    So i don't really want to fully winterize the boat as i will be using it throughout the winter. Living in Western WA, it doesn't get real bitter cold, although it does freeze from time to time, and I plan on doing some fishing on the lake when the weather isn't "too" miserable. As a full time...
  6. J

    Loving it so far!

    'Bout 2 weeks ago, I bought 1991 maxum 1800 SR w/ 3.0 L merc I/O. I've spent more time so far wrenching on it that floating on it, and i gotta tell you... i love it! Blew the starter first time out. Fixed that, replaced the slave? Solenoid on the block, and yesterday disassembled most of the...
  7. J

    slight water leak

    What is the fore and aft cylinder shaped thing on the starboard side of engine compartment on 3.0L merc? I assume it is part of cooling system. It had a small leak today. I thought it was the hose, but that wasn't it, so I tightened the 9/16 bolt on the aft end of the cylinder, and that...
  8. J

    Salt Water

    So, I am curious about the amount of corrosion if I run my 3.0 L Mercruiser in salt water? It is 20 years old, runs good, but I am a little nervous about running in salt water. Any suggestions to keep corrosion to a minimum and operability to a maximum?
  9. J

    91 mercruiser 3.0. starter spinning, engine not so much.

    I have 91 Maxum 1800 with a mercruiser 3.0l. Today I had it out on the lake, and it started right up, and ran well all morning. I shut it down to drift a little and fish, and when I went to restart, the starter just spun, but the engine wasn't turning over at all. Any thoughts would be...
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