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  1. Lou C

    Volvo 5.0 gxi Stalls at idle. Hard start.

    It is also well documented by people who owned GM trucks that used the same system. Sometimes these "improvements" are anything but. In the old days GM HEI caps lasted a long time as do the Prestolite design caps I have used on my old points distributor. I replace 'when I see corrosion on the...
  2. Lou C

    Intake manifold

    updated 2 piece exhaust on 1988 OMC 4.3
  3. Lou C

    OMC 5.0L Wiring Diagram

    When replacing engines you can’t mix years that are not part of the same basic series with the exception of changing a one piece main pre Vortec with a Vortec (all of which were one piece main seal engines). This is a change GM made has nothing to to with OMC or Merc they just had to change...
  4. Lou C

    Drive oil

    That’s the Premium Gear Lube. Different product. You want the High Performance Gear Lube. I’ve used it in my OMC Cobra for 15+ years at the advice of my now retired mechanic. It runs quiet and shifts like new.
  5. Lou C

    OMC 5.0L Wiring Diagram

    That explains it then. The 1984 engine is a 2 piece main seal engine and the 1997 is a 1 piece main seal engine. The flywheels are different & that’s why the Merc coupler won’t fit the OMC flywheel. Not sure how to work around this….
  6. Lou C

    Risers and manifolds at the same time?

    And in either system the elbows deteriorate faster because they are partly full of water but not fully like the manifolds. The air gets at damp surfaces at the end of the elbow and corrosion there is usually the worst. As noted the sealing surfaces especially on wet joint systems often gets rust...
  7. Lou C

    Intake manifold

    That part # is for the exhaust manifold. Once in a while you can find those units on eBay but they are all used & old, might be ok for a few years but who knows. The better plan if you’re going to keep the boat is to convert it to the later style exhaust. You can buy a conversion kit from GLM...
  8. Lou C

    4.3L Mercruiser Milkshake

    Interesting. Does look like rust thru rather than freeze damage because the cast iron there looks very thin. My original short block has 20 seasons in salt water on it maybe more but I have been filling the engine with AF with corrosion inhibitors since I’ve owned it for winterization. Wonder...
  9. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Hard to say but check if the fitting is loose or the clamp is loose. Might be necessary to just carefully tighten…
  10. Lou C

    5.7L MerCruiser Bravo III under water...repairable?

    That's really a shame all the owner would have had to do is pay someone to pull the boat for him when they could no longer use it, winterize it and pull out the plug, cover it appropriately for the elements.
  11. Lou C

    Merc 5.7 Keeps Shearing starter bolts

    Yep that has to be dealt with fast. If you don't have much time just remove the plugs, spin it over, and drain both the manifolds and engine, then oil up the cyls to prevent rust. Check for water in the oil as well, not just on the dipstick but also under the valve covers where it tends to show...
  12. Lou C

    1989 mercruiser 5.7 carb exchange

    I'm sure that Crusader used a Marine Q-Jet as OEM, but after all those years (they stopped building Q-Jets in about 1990 or so) and people's reluctance to properly rebuild an original (which I don't understand, they are just not that hard to do, at all) who knows what happened! The only new...
  13. Lou C

    Actuator rebuild

    Yep that's the old version. Check on Corvette and Mustang restoration websites for parts and rebuild instructions. I was able to find a good used unit for my OMC on ebay. I also have the rebuild kits as well. Removal isn't fun! PS these have a grease fitting on the back side of them, do not...
  14. Lou C

    1989 mercruiser 5.7 carb exchange

    Make sure that it’s actually a marine carb. One difference you can see easily is the barb on the carb body for the mechanical fuel pump overflow hose. Right front part of the carb bowl. Auto carbs don’t have those. I don’t recall seeing any emissions certification on Marine QJets so if I saw...
  15. Lou C

    Actuator rebuild

    The older style ones with the control valve that has 2 hydraulic lines attached to it can be rebuilt because that valve is the same as what was used on Corvettes & unit body Ford products like the Mustang. Those parts and sone of the seals for the hydraulic cylinder are still available. The...
  16. Lou C

    Intake manifold

    do a search on my member name...I replaced those one piece units with Barr aftermatket + Volvo Penta parts to mate them to the OMC Y pipe....
  17. Lou C

    Merc 5.7 Keeps Shearing starter bolts

    If you’re lucky it will be faulty exhaust….
  18. Lou C

    End of Season Maintenance

    Agreed; regular maintenance saves money and avoids repairs in the long run.
  19. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Yes all boats will need work; I’ve done a lot on my old 1988 Four Winns 4.3/Cobra. However for old boats affordable parts are kind of a make or break thing.
  20. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    See it now? the lost simplicity I was referring to: simple old style V/P exhaust system This was a retrofit to an OMC 4.3 V6 that originally came with the OMC one piece manifolds that have long since been NLA. I knew that OMC changed to this later system before being bought out by V/P in '93/94...
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