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  1. C

    Difficulty level of changing clutch dog

    ------------------------------ -------------------------------------------------------------------------------- 1986 4.3 -changed shift cable last year but now occasionally starting to jump out and back into gear especially under a hard pull (skier).It sounds like hitting a
  2. C

    43 water in valve covers only

    "Ok-same problem as posted man "Ok-same problem as posted many times before. I have a 1986 4.3 that has mayonnaise in the the valve covers only. Never have found water in the the oil pan. Engine runs strong/great. Have done a pressure test with air on the cooling system and no pressure drop...
  3. C

    Marine parts

    "Just came from my local Napa "Just came from my local Napa auto parts store that I have done business with for 10 years for my auto and agricultural equipment parts. I did not know that Napa has a whole line of marine parts avaliable. Got the catalog from them, extensive mercruiser parts...
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    Rochester 4bbl tuning

    "I put a Rochester 4bbl on my "I put a Rochester 4bbl on my 1986 170 Four Winns 4.3. omc. It is a factory rebuilt marine 4bbl that was listed for a 4.3 mercrusier. Four Winns offered it as an option in 1986.It does do what I want- it gives me more power at hole shot with a full boat and pulling...
  5. C

    Electronic conversion for esa interupt and overstroke microswitchs

    "I am having trouble getting i "I am having trouble getting interupt and overstroke micro switches to work at right time. Have original omc manual with step by step adjustment but still not correct. I have read past posts about petronox electronic ignition (I have points) and the esa module...
  6. C

    OK to shift into gear with only muffs on

    My 1986 4.3 cobra is waiting f My 1986 4.3 cobra is waiting for removed seats etc to be upolstered and I would like to change shift cable and service outdrive. Is it OK to shift in and out of gear with just the muffs on?
  7. C

    Replaced 2bbl with 4bbl Rochester on 86 43 OMC

    I just replaced my 2bbl roches I just replaced my 2bbl rochester with a 4bbl rochester and manifold on my 86 4.3 omc (just wanted the 30 more hp.) Got a Napa Marine rebuilt carb and used manifold. Idles great. The secondaries don't always open on acceleration. Sometimes there is some wavering...
  8. C

    Replace 43 with long or short block

    "1986 OMC 4.3, I have done eve "1986 OMC 4.3, I have done everything to find water leak, pressure tested cooling system cold and hot, I am givin in. What really bothers me is that this engine just runs so sweet. Should I get a long block or short block? I have not seen any short blocks online."
  9. C

    Replace OMC 43 exhaust manifolds with Volvo 43 manifolds

    "I am thinking of replacing my "I am thinking of replacing my 1986 omc 4.3 exhaust manifolds. Does anyone know if you could use Volvo 4.3 manifolds. Isn't the 4.3 a GM in both omc and volvo/penta? I would have to make up some of the pipe from the Volvo riser to the omc transom pipe, but $200...
  10. C

    OMC 43 still have water in oil

    "OMC 4.3 still water in oil pl "OMC 4.3 still water in oil please refer to post on 8-16-06. I finally found time to pressure test the cooling system side of the engine. I put 24 lbs air pressure at t-stat. Presasure has held for 6 hrs. I have checked head bolts with soapy water. No hiss, no...
  11. C

    43 still water in oil

    See earlier post about water i See earlier post about water in oil. Now I have pressure tested each cylinder with 50 psi air at TDC and looked for bubbles in water were t-stat housing sits. NO bubbles. I removed exhaust manifolds and found both flappers were missing in pipe. Replaced flappers...
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    Can you safetly disconnect flutter switch 43 OMC

    "I am looking for instructions "I am looking for instructions on how to adjust the shift interupter switch (flutter switch) on my 4.3 OMC. I is out of adjustment and flutters engine just as I try and increase speed. Not when I shift. There are no directions for adjustment in Seloc Manual. Both...
  13. C

    Omc 43 water in valve covers but not in pan

    "I had a valve job done on my "I had a valve job done on my 1986 4.3, 30 hrs ago. Just now see "wipped cream" in valve covers but no water on dipstick. Seloc manual says could be cracked block, intake manifold water passage leak or condensation if running too cold from stuck thermostat(replaced...
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