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  1. Lou C

    4.3 Gl over heat

    Average life of a cast iron exhaust system in salt water is 5-7 years. This depends on salinity of the water & how often you flush the system.
  2. Lou C

    4.3 Gl over heat

    Next is your exhaust manifolds & elbows. I bet they are corroded inside and restricting water flow. Time to pull them & inspect. Here's what new looks like for the manifold:
  3. Lou C

    1988 OMC 4.3 2V - Leaking Manifolds

    Here's mine when I was trial fitting all the parts. an easy way to install the manifolds is to take a bolt from the kit and go to the hardware store and buy 2 identical pitch but longer bolts. Cut the heads off and cut a slot in the stub. Thread one the first and last holes in the cyl head for...
  4. Lou C

    Popped through the intake.

    Is that all from the intake gaskets? Mine blew the head gaskets 2 years after an overheat but it didn't look that bad, even though it was in salt water. Judging by the rust in the intake ports it is possible an intake valve could be hanging open. When I pulled out all the lifters the cam looked...
  5. Lou C

    1988 OMC 4.3 2V - Leaking Manifolds

    Those go on dry no sealer...
  6. Lou C

    5.0 GXI Gaskets

    The things that have to be marine grade are head gaskets & core plugs & that’s only if you use raw water cooling.
  7. Lou C

    Marine Carpet Glue For Wood Decking

    My part of Long Island NY has some of the highest property taxes in the country I can tell you it will never happen till I leave. They will take the last nickel you have.
  8. Lou C

    Overheated 1989 4.3 OMC questions...

    Down pipe is part # 19 above. You can see all the components of the 2 piece system in this diagram. OMC & Volvo used this basically identical system. Some parts you won’t need with a pre Vortec V6 (pre 1996) are the one way check valves (part # 5) that are screwed into the exhaust elbows; these...
  9. Lou C

    Overheated 1989 4.3 OMC questions...

  10. Lou C

    Marine Carpet Glue For Wood Decking

    Yes that can work if you have the ability to get the boat inside so it dries out. Outside even under a good cover it will stay damp at least in this climate. No one around here had barns or garages big enough for boats. It’s just how it is.
  11. Lou C

    Overheated 1989 4.3 OMC questions...

    Very easy to remove those nuts. To pull the manifolds you have to spray silicone spray on the Y pipe & slide the bottom hoses down over the Y pipe. Might have to shove a thin screwdriver under the rubber & heat it a bit with a heat gun to get ‘em loose they kinda get baked on…. The down pipe is...
  12. Lou C

    Marine Carpet Glue For Wood Decking

    What’s your climate? Here a wood deck built off your house even if made of cedar lasts like 15 years most of it if not all will need to be replaced. Seaside area more or less constant moisture . That, termite’s & carpenter ants love the moisture. I don’t trailer miles to use the boat it’s is...
  13. Lou C

    Overheated 1989 4.3 OMC questions...

    IIRC I paid back in 2017: Barr Kit $725 Each of those VP down pipes was like $210, the hoses & clamps maybe another $100 (these were all brand new), so it was like $1250 for all the parts. If you’re in fresh water you’ll do this once; here in the salt pond we have to change manifolds & elbows...
  14. Lou C

    1989 5.7 omc propeller not spinning

    That prop definitely does not fit right try taking it off and checking which way the spacer is installed
  15. Lou C

    2001 Reinell 190 with Ford motor and OMC outdrive

    I’d love to see some pix of this…thing…
  16. Lou C

    Marine Carpet Glue For Wood Decking

    The carpet holds moisture for an extended period of time if you can’t put the boat in a garage or barn. When I ripped up the carpet the boat had been covered over the winter the whole area under the rear seats was still soaked. 1) polyester resin really isn’t waterproof it if it was boats...
  17. Lou C

    1988 OMC 4.3 2V - Leaking Manifolds

    Yep that’s what you need. When you install the gaskets between the manifold & elbow follow the manufacturer’s instructions as to whether you need sealer or not & torque specs. Volvo actually revised their gaskets a few times. I used the Barr gaskets with no problems.
  18. Lou C

    1988 OMC 4.3 2V - Leaking Manifolds

    Yep that’s what you need. When you install the gaskets between the manifold & elbow follow the manufacturer’s instructions as to whether you need sealer or not & torque specs. I re-torqued mine after running it for a while….
  19. Lou C

    2015 Motor MerCruiser 4.5L 250hp NO EC - OVERHEATING!

    BTW I had trouble with some of those dual inlet muffs because the rubber was too stiff to seal well against the lower unit. I had much better luck with the Mercury/Quicksilver round muffs with the metal clamp.
  20. Lou C

    1988 OMC 4.3 2V - Leaking Manifolds

    Before I invested $$$ I’d make sure that the block isn’t cracked. Look way down in the area above the oil pan (in front of the starter on the starboard side & in front of the oil dipstick tube on the port side) for rust stains….if it’s OK… those Batwings were used from 1985-1990, after that OMC...
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