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  1. Lou C

    Mercruiser 4.3 L Manifolds

    That is true, one thing that people should do is always measure static water line vs manufacturers specs. If you add weight to the stern because you added a bigger swim platform, or went from a V6 to a V8 your elbows could wind up too low. Merc makes spacers for this problem and Volvo makes...
  2. Lou C

    Mercruiser 4.3 L Manifolds

    That’s the problem without some advanced visual imaging techniques you can’t tell if the casting is too thin or not. FWIW, I had 3 sets of the OMC version of the same thing over 15 years in salt water & never had a failure. But, that was replacing them proactively due to salt water use. All you...
  3. Lou C

    Another gear oil thread... 80w-90 vs. 90

    I have used Merc/Quicksilver High Performance gear oil in my Cobra on my previous mechanic’s recommendation and it has kept it shifting like new for 20 years, all salt water use.
  4. Lou C

    Mercruiser 4.3 L Manifolds

    PS that conversion kit I think is about $1200 from Barr. Check out Lighthouse Marine (Partsman) in Riverhead Long Island they do stock them & will ship to you. They are local to me so I just drive out there & save on shipping…
  5. Lou C

    Mercruiser 4.3 L Manifolds

    Barr Marine makes a nice conversion kit for the batwings and is a good deal cheaper than Merc OEM. The key to it is the down pipe adapters that allow you to use the same Y pipe. I did I similar conversion on my OMC 4.3 with the OMC batwings. I used standard OMC/Volvo manifolds & elbows and...
  6. Lou C

    Mercruiser 5.7 EFI Water in Oil

  7. Lou C

    Mercruiser 5.7 EFI Water in Oil

    It’s water passages but only some of them however I’d just put sealer on all the bolts. Pretty much a small block Chevy thing but other engines are like that too. The thing that messed up a lot of engines was confusion when the Vortec engines came out. The torque spec for the intake was like...
  8. Lou C

    Does anyone remember when car & boat engines only had.

    I refuse to: Get rid of my boat with a carb & no electronics Get rid of my 2 stroke yard equipment. I have a bunch: 1998 Toro 2 stroke Suzuki 5 hp snow blower Echo trimmer Echo blower Echo hedge trimmer Husqvarna chain saw All the Echo machines are about 20 years old, excellent machines good...
  9. Lou C

    Another gear oil thread... 80w-90 vs. 90

    Living on an “island” we have plenty of boat supply stores so don’t ever have to go to Walmart lol.
  10. Lou C

    Mercruiser 5.7 EFI Water in Oil

    Do both sides, take heads to a machine shop to check for cracks & maybe do a valve job at the same time. Mine both had cracks from a bad overheat but amusingly it ran fine with normal compression until I started getting water in the oil & a bit of water in 1 cyl, just a trace of water in the...
  11. Lou C

    Mercruiser 5.7 EFI Water in Oil

    This can be tricky to figure out. A leaky intake gasket will put water in the oil vis the cam valley but not in the cylinders. A leaky head gasket can put oil in both. To further complicate things a bad HG doesn’t always show up on a compression test. Mine didn’t! I did the clear hose test...
  12. Lou C

    Tips On Replacing Starter

    The new style PMGR starters are so light that you can hold it up one handed & get the bolts started
  13. Lou C

    Starter install help.

    Try to get down by the starter and take a pic of the wiring on the solenoid. There is a wire that you didn’t mention that goes from the solenoid positive terminal up to the alternator B+ (output) terminal. Is this in place?
  14. Lou C

    Major engine malfunction today and could use advice on next steps

    The wiring issue might be a result of the overheated exhaust manifold melting wires or connections. If the impeller was intact you should really consider inspecting the exhaust system; in salt water it is a regular maintenance item that may require replacement every 5-7 seasons. Sometimes you...
  15. Lou C

    Stupid me, no oil

    You really have to spray them with Corrosion X every few years. I’ve been doing that and my 1988 4.3 still has the original pan & it’s been kept on a salt water mooring for 20 seasons 5/6 months each season.
  16. Lou C

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Power valve is supposed to open at a specified vacuum level and enrich the fuel mix. Head over to Holley.com there are many videos & info on how these carbs work. Probably 85% of all the carbs on Hot Rods & many classic cars are Holleys because they are a standard design modular carb in...
  17. Lou C

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    OP has a simple Holley 2bbl not the EFI. I’d prob go thru the carb again & carefully clean the jets, passages & air bleeds. Replace all gaskets & install a new accel pump diaphragm
  18. Lou C

    Tow Smart "Submersible" LED tail lights are junk... better solution?

    That could be the ones I bought 9 years ago were made here.
  19. Lou C

    Tow Smart "Submersible" LED tail lights are junk... better solution?

    https://tecniqinc.com/
  20. Lou C

    Tow Smart "Submersible" LED tail lights are junk... better solution?

    American made & excellent Tecniq lights Installed in 2015 still working, salt water trailer
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