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    Hard Starting when warm

    Hey guys, I have a 1990 OMC Cobra 4.3L with brand new 2BBL holley carb. and a brand new electronic delco voyager distributor with a brand new fuel pump as well with new spark plugs. Here is my problem, I took my boat out and everything was running good on my first 4 tanks of gas. Approximately...
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    Gas Tank Repair

    I have a plastic in-hull gas tank that I am having some problems with. Where the pick-up mount and the sending unit mount, mounted on top of the gas tank are not sealing properly. The mounts are metal and the gas tank is plastic. With a full tank gas leaks through and out of these mounts. I have...
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    Low Compression

    Hey I just did a compression test on an engine that has been sitting for awhile. All the cylinders checked out good for compression except for one cylinder. My question is: What will having compression low in one cylinder do to our engine? Will the engine not run properly? Could the compression...
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    OMC Shift Assist Module

    Hey guys, Just updated my 1991 OMC Cobra 4.3L with a new delco voyager est electronic distributor. I have it all set up and running but my question is, what do I do with the shift assist module? How do I set it up on my engine or what do I do with it now? Thanks
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    Timing or Carburated Issues?????

    Hey guys, I hope you can help me out on this problem. Heres my problem: I can run around the lake at 3,000 RPMS ALL DAY long without a problem. (after running, turn the motor off and look in my carb. with the throttle completely open so the carb. is open and white smoke comes back out of it)...
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    Rust build up

    I got a boat engine that has quite a bit of rust build up in it in the water pathways throughout the engine. Its causing me cooling issues on the water. This isnt surface rust on the engine walls may I add. This engine has been is saltwater which is half of my problem. What is the best way to...
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    Valve adjustment

    I have a 1991 OMC Cobra. gm v6. Awhile ago I was getting water in my oil. My head gaskets were leaking. So I pulled my heads off and changed them. May I mention I had gotten alot of water in the engine. After this I put everything back together as the repair manual said. Than I ran the engine...
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    Carb. rebuild

    Does it matter whether I get my marine carb. rebuilt by a car mechanic shop or a marine mechanic shop?
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    OMC Cobra ignition help~!

    Hey guys I took my boat out of storage last weekend and changed the oil startd in up in the driveway and everything was fine. Went out to the lake and no start. I began trial and error process and checking everything out. I am thinking it is electrical problem. A blown fuse maybe or something...
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    OMC cobra exhaust

    Hey guys. I have a omc cobra v6 gm motor. And I was wanting to send the exhaust straight out of the boat in the back. Give the boat some noise and a sense of power!!! Can anyone give me some tips or any of advice of how to do this?
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    shift assist module

    i have a 91 omc cobra v6. can anyone tell me the the purpose of the shift assist module?
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    Omc cobra ho timing sensor

    Can anyone help me out>? I have a 91 OMC COBRA HO setup. Can anyone tell me if that motor has a timing sensor? I have the plug in and it says the sensor is located on the upper flywheel housing but there is no sensor to be found or even look like there was a sensor there at one time. Does anyone...
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    omc cobra HO timing sensor

    I just bought a 91 4.3L OMC Cobra HO motor. I was looking at the wiring and an adaptor is not connected. Further inspection it was the timing sensor connector. I believe that the timing sensor was taken out or I am just missing it. Can anyone help me on where this might be located on a part or...
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    Converting to 2BBL to 4BBL

    Hey my first post! I have a 1991 4.3L GM OMC COBRA with a 2BBL Carb. I just bought a 91 4.3L HO OMC Cobra engine that was cracked during winter storage. I was just going to part out all the parts. I noticed it has a 4BBL Carb. Can I put that on my engine? If so, what all would I have to do...
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