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  1. mtconcreteco@gmail.com

    91' OMC 4.3 to 02' 4.3 Vortec Block swap(maybe carb to fuel injection)

    Hey there, A little back story... i have a 91 four winns with the 4.3 omc 2nd year i have owned it and it sat out a long time before i got it. The first year i was getting water in oil but boat ran pretty good. I pulled intake manifold and sure enough a couple hair line cracks in block...I also...
  2. mtconcreteco@gmail.com

    1991 Omc 4.3 Cobra, Compression test results.....?

    Hello there, In need of help. I Have OEM 1991 OMC Service manual and i can not find the info i need. Just got this boat a couple weeks ago, ran though it doing and checking all the things you would before taking it on the lake. Oil looked good before i started it. actually everything looked...
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