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  1. A

    Alignment tool how to use

    I have got my motor in and was trying out my new alignment tool. The tool goes in nice n smooth but I do not see and spline marts on it. Any tips here. Also I did not adjust the locks nuts in the motor mount just dropped the new motor in the same spot. PS you guys have been great through the...
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    Impeller installation which direction

    I need to make sure I am puting the impeller in correctly can some one please tell me what way the fins rotate in the housing. 1990 4.3 omc cobra
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    How to test a water pump

    I m getting ready to put my new motor back in this weekend. After knowing for sure my other one got hot tore ever thing up i know i need to make sure the same problem does not happen on my new motor. should i just buy a new water pump or can i test the one i have i would rather change it now...
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    Center bolt on crank pulley broke

    I broke the bolt putting the balancer back on the crank. Any idea if I just put the other 3 bolts through the pulley onto the balancer will that be enough to hold it all? Or will I have to easy out the broken stud which will be a pain in my ***.
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    Timing chain cover gasket removal

    I am reassembling my motor and I can not get the old gasket to pop out of the timing chain cover. Any tips please I was not going to take it apart and just reuse it cause it looked ok but decided to cause the gasket kit came with one no i have beat it up trying to get it out.
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    1990 4.3 omc head bolt size

    Can some one please tell me the head bolt size please??????????
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    pulling motor hot to pull it???????

    I have 1990 omc 4.3 and I am very curious what bolt are holding the motor in? there is 5 bolts on the bell housing area and then the 2 main engine bracket bolts. But there is also 2 larger bolt towards the transom that look like they me need taken out also with out having to unbolt the bell...
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    Omc drive and motor alingnment tool

    I am curious if there is any thing else I can use instead of having to buy this item for a one time use? I am puting in a new motor and have the drive off when puting back together i was curious if there is a size of pipe i can use.
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    1990 omc exhaust manifold

    I would like to know how I can check and make sure that both manifolds are in working condition? What can be done to inspect them? Can a machine shop do any thing special?
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    Omc 4.3 removal best to pull motor

    I am pulling the motor in my 1990 omc 4.3. I have heard that leaving the out drive on is the best way cause of reinstalling issues. As long as I have 6 or so inches should I be able to pull the motor forward to get the shaft out, then pull it up and out?
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    Motor tore down burnt piston??? Help??

    I got my motor tore apart heads off and they are going to the machine shop. but I have a piston that is toasted has chucks of the ring on top of it burt good from when the motor got hot. the cylinder walls seem to feel ok. Im going to pull the motor completely out and change the one piston...
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    Blown head gaskets

    Both sides of my cylinders have water in them 4 out of 6 it is a 1990 4.3 omc. The motor got very very hot temp gauge i found out does not read over 200 degrees and the thermostat froze shut. Should i have both heads checked or just replace the gaskets and see what happens?
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    Motor got hot smelled electrical burrning

    Took the boat out for the 4th time this year seemed to be running warm gauge said 200 degrees which it was ussualy 150. after driving for about 5 min i noticed an electric smell so i slowed down then head some thing like fire so i shut it down and opened the engine hatch to hear water boiling...
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    Cant get thermostat out of housing?

    My boat got hot so im checking the thermostat and it seems to be pressed in the housing? any one got any tips. its a 1990 4.3 omc. PS the impeller is good
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    A lot of smoke coming from pvc valve tubes?

    I have noticed a lot of smoke coming from these tubes coming out of the valve cover pcv valve tubes that connect to the breather especially when revving it up, at idle there is very little to none. is this normal or should it only be when running hard or just some fumes?
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    Holly carb who to rebuild???

    I have a 1990 4.3 with a holly on it and needs rebuilt and cleaned very bad. Any one have any tips who to use that is good at it and can have a good bench setting for me to bolt in on and go.
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    Hard start and rough idle

    I am sure the carb is original to the boat it is a 1990 omc 4.3. Im having issues starting the boat has to crank for a bit to fire then it idles rough have to keep the revs about 1000 to keep it running decent most of the time. The boat runs great so im guessing the carb is old and needs...
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    Clunking/exhaust leak sound engine bay? Help.

    Got the boat running good took it out ran great with a few little items to look into please give me some tips!!!!! 1. most important, the motor or outdrive has a noise that sounds like the drive shaft is slapping some thing or kinda sounds like an exhaust leak what confuses me is it makes the...
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    Firing order 4.3 1990 help

    Any one have the firing order for a 1990 omc 4.3. And the distributor wire locations? Please.
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    Changed point now will not start

    Ok please help i have never played with points but after alot of research I thought I could do this since there is not much I cant do. After a full tune up new plugs, wires, cap, rotor and points. The boat ran ok before just took a little when starting it and to get it to idle smooth especial...
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