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    Water in the BOAT

    How do I know if my boat is holding water somewhere it shouldn't? How can I drain it if it is all the way down? My max speed a couple of months ago was about 50-51mph. A month later 47mph and now 41-42mph. It has been used alot already this year. I have replaced the coupler, and the shift...
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    39377466C0N2J149 What year merc 120hp is this??

    This is a 120 hp mercruiser marine motor. I don't know how to find the year for it. It is on an 81 starcraft, but the guy told me it was not the original. Any thoughts???
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    Transom assembly question

    Will a 1980 120/140 hp pre alpha changeout with a 1984 229 cid 165hp out drive??? What would be the problems if they would or wouldn't? Thanks
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    Tachometer????

    Is there any difference in a tach for an inboard and an I/O???<br /><br />Thanks
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    battery or alternator???

    My negative battery cable got so hot it melted all the insulative rubber around it. I also could not restart it after I stopped. I founded that my cables were not real tight. Could this have been the problem or would it be something else? Thanks for your help.
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    four winns tri hull

    When did four winns stop making a tri hull.<br /><br />Thanks
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    1979 Mark Twain. Lenght ???

    I just bought a 79 Mark Twain. I measure it to be just over 17ft. It's model # is 180v i/o BR if that helps. The hin is mtm11042m79e. Am I missing the mearsurement? Is it an 18 footer??? Can you help me out???
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    prop question

    will a 21 pitch prop plane me faster or a 19p?<br /><br />For sking
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    gear ratio

    How do I find out what gear ratio I have? It is on a 79 pre alpha with a 305. Also where can I find the prop slip? It is on the prop, right? Thanks,
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    coupler or shifter cable??? pre alpha mercruiser

    I have a 79 mark twain with a 305 and mercruiser drive. I can get it in gear if I adjust it all the way to one side...either all the way forward or all the way reverse. I have not done this in the water, yet. Basically, if I pull on the cable and have someone stand behind the boat and spin...
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    Should there be a resistor between the coil and cap

    I am burning the little center peice out on my distributor cap. Do I need to put a resistor in between my cap and my coil? If so does it need to be an 8 volt resister? Its on a 79 mark twain with a 305 mercruiser..
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    adjusting shifter cable

    If I take both cables off I can put it in either fwd or rev. When I adjust them to what I think is right it does work while I have it on a water hose. When I put it on the river there is no telling what is going to happen. I have tried doing it at the river, but no good ever comes. Right...
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    trim gauge....has power...only moves to up position

    It does not work correctly. It is getting power because when I turn it on it always goes to up. Of course, I know this is not correct. What type of sensor should I be looking for? I have some experience dealing with certain up and down indications. Then I had a manual. I know, I know I...
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    trim gauge....has power...only moves to up position

    It does not work correctly. It is getting power because when I turn it on it always goes to up. Of course, I know this is not correct. What type of sensor should I be looking for? I have some experience dealing with certain up and down indications. Then I had a manual. I know, I know I...
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    Free flood area behind the prop

    When I take the prop off should there be water behind it. I know there is a seal a few inches behind that where there should be no water.
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    Alpha drive V/S Bravo

    First off what is the difference in the two? Second, how can I tell which one I have? I have an old mercruiser on a 79 mark twain with a 305. Also, how can I see what type of horsepower mine puts out? Thanks,
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    more prop questions

    What is the difference between a pitch right and left? Does that mean if I put the wrong one on my boat my fwd would be rev? Also how can I tell if I have an Alpha or Bravo stern drive?
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    Prop prices

    How much do you guys pay to have your props refubished? Including the inards and having them clean the out up and balance it. I have a 14 1/4, 19 pitch on my mercruiser. I figured this was as standard as they came, so, it would be fairly cheap. Maybe $100. Oh, it is stainless. My local...
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    Cannot get my boat in a gear.

    It ran fine for a long time on the same day that the problem occured. I stopped for about 15 min. As I headed back out at about 5mph I gave it a little more gas. The engine reved up and it seemed to be out of gear. I slowed down again and tried to get it in gear. Again I could go about...
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