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    Cracked block- External 'How To'

    Just thought I would post up my recent findings. I have a OMC 3.0 L that I recently discovered has a decent crack along the block underneath the manifold. It ran fine with no water hooked up then when I had done all the work I needed to, to the boat and engine I hooked up some muffs and started...
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    Having trouble getting OMC Cobra running

    The video below is what happens when it does actually somewhat "start". But this is only with the starter still engaged the minute I try and put it back to on position at the key it shuts off. Any Ideas? http://www.youtube.com/watch?v=Kh-isfP_XaU
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    OMC Starting Issue

    So I recently purchased a boat with a 1987 (I Think) OMC 3.0 4cyl Serial number T0969422. When I turn the key all I hear is a Click noise and then nothing happens. I replaced the solenoid because that is what the marine store recommended. Any other thoughts? Would it not start if the outdrive is...
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    Drainage issue.

    I have a 1987 Cuddy Cabin that i just purchased , where you go into the cabin part of the boat in that step down there is a hole that i assume is suppose to drain water that collects there but i can see the water just sitting beneath the whole , my question is how can i get the water to the back...
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    Mericrusier I/O ,fuel,and starting

    Hi all, I just bought a 1987 18' Sport-Craft Cuddy Cabin for $500. I have a few questions, the hr reading on the dash is 424.3 is that a lot of hours on a mercruiser engine, also I did not get the opp to test the engine because no battery, and its been sitting a while and I didnt want crappy...
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    Switchbox? or Trigger?

    Ok I am trouble shooting my 1975 Mercury Outboard 85hp. I Am now going on my THIRD switchbox on this motor. So I read it might be the trigger. Does the trigger transfer power through the switchbox to the coil ? Also I am not positive on the whole jumper wire tests. ANY INFO would be greatly...
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    After market switch box

    Hey I was wondering if anyone has switched there mercury switch box for a new cdi one, The one I am looking at has the coil built in and is actually a lot cheaper then a factory one, Any input would be great, Thanks http://www.magemarinestore.com/cdimeresw111.html
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    Question regarding switchbox

    This is my 2nd switchbox on my mercury 850 I am not getting spark and my coil is not getting any juice when i turn it over everything on it has power except coil , what makes these things go bad and is there anything or anyway to rig it up so I dont have to pay 500 bucks for a new one Mercury...
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    How to figure out if I have a bad transom

    This is my first boat its a 1959 MFG gypsy tri hull and it is good condition , but it use to have a blown 50hp on it and i just recently put a 85hp mercury on it a lot heavier and the max size allowed for this boat and when I first put the motor on the boat going down the road and hitting a bump...
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    Need of wiring diagram!!

    I have a Mercury thunderbolt 850 and im switching over parts from a older 850 and noticed there are differences like the coil and carbs and other things so i am looking for a wiring diagram so i can figure out how to hook up everything. Serial number is 4101442 Mercury Thunderbolt 850 Thanks...
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    Mercury Thunderbolt 850

    Just bought a old merc motor serial number 3497531 not positivie on the year, but I bought it knowing it has no spark i was wondering what this could be and how i would go about testing to see what is going on i am clueless i have heard it might be the switch box or coil?
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    1969 Mercury 50 hp

    Alright recently I just purchased a tri hull boat with this motor on it. It will run fine on high idle but I can not get it to run without being on high idle which is bad because when I engage it into forward it jerks and for a 50 hp it is not going as fast as it should and most of the time it...
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    motor wont run without choke

    Hello everyone I am new to the forum and new to boating in general. I just recently picked up a 1959 Tri hull with a 1960s motor I am assuming im not positive on the year i cant find a model number anywhere. But this is my problem. It will not run without choke fully on meaning hardly any air...
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