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  1. Lou C

    New motor knocking???

    I had milky oil like that simply from blown head gaskets. The heads were cracked from a previous overheat but that's not how the water got in 2 cyls and the oil. As it turned out the repair wasn't that complicated. Replaced the heads with a reman set and it was all good. Got the water out fast...
  2. Lou C

    Is there a better gear oil pump out there?

    been like this at least 10 years lol. without the clamp I think they suck air and don't pump right.
  3. Lou C

    Is there a better gear oil pump out there?

    I have a Merc one I bought like 15 years ago and put a hose clamp on the hose on the pump end this seemed to make it work consistently. I have a few of them for the Jeeps for gear oil & transfer fluid changes.
  4. Lou C

    Exhaust Flappers

    agreed if Merc could have saved money by eliminating them they would have, so if they were there, they are needed.
  5. Lou C

    malibu 5.7 mercruiser

    Yep the Quadrajet is a 4bbl, if yours is flooding like that, then there is probably a bit of grit holding the float open or the needle valve is not sealing. The rebuild is not hard but there are some tricks to getting the air horn off, and on, and you have to really clean out the idle air tubes...
  6. Lou C

    New motor knocking???

    Clean up the sealing surfaces as best you can and check for flatness with a straight edge & feeler gauges (less than .003”) I used Fel Pro marine intake gaskets on mine and they sealed well. Make sure that the bolt holes in the heads are clean.
  7. Lou C

    Can someone PLEASE tell me which bellows are which? taking on some water...

    Same here. Outboards from now on. Life is too short at this point to be fiddling around with all the extra hassles and if you price modern I/O parts prices vs outboards they are just as bad; but with all the designed in headaches of I/Os. Mechanics here in the salt pond refer to them as “double...
  8. Lou C

    Can someone PLEASE tell me which bellows are which? taking on some water...

    You’re welcome! I’m in a salt water region and have an old boat used in salt water approx 20 years. While salt water corrodes all metals it’s less likely to rot wood. Fresh water actually causes more rot. As legend has it the bacteria that causes wood rot can’t live in salt water...
  9. Lou C

    Can someone PLEASE tell me which bellows are which? taking on some water...

    Go back to the first parts diagram I posted, The transom seal is part #65 it’s a loop gasket that goes around the inner side of the transom mount, yes these can leak but often it’s a transom with the wood coring getting soft after all those years. Unfortunately this repair is VERY involved: Pull...
  10. Lou C

    Can someone PLEASE tell me which bellows are which? taking on some water...

    No. The only way that running the engine on the muffs will put water in the bilge, is if your hoses for the exhaust system, or the gasket where the exhaust Y pipe is bolted to the transom mount leaks, or if the Y pipe rots through somewhere and leaks. Rusted exhaust manifolds and elbows can...
  11. Lou C

    Can someone PLEASE tell me which bellows are which? taking on some water...

    Bottom one is the exhaust bellows, it will usually have a series of slits in it, this and the exhaust Y pipe are both full of water when the boat is in the water, that water will be nearly up to the level of the rubber hoses that come down from the exhaust elbows onto the Y pipe on each side...
  12. Lou C

    1985 OMC 3.8 v6 exhaust manifold questions

    1 1/2” So based on your pic even the Barrs would be to big to fit without grinding.
  13. Lou C

    New motor knocking???

    Before you take it all apart there is an air pressure test you can do to determine if the cooling system holds pressure; and also with the boat in the water you can replace the manifold feed hoses with clear hose, and run it till the stat opens, if you see bubbles in the cooling water that’s a...
  14. Lou C

    5.7 1987 OMC shuts off at Low RPM

    The spec is 500-600 rpm in the water...
  15. Lou C

    5.7 1987 OMC shuts off at Low RPM

    remember shift from n to fwd, and fwd to n
  16. Lou C

    1985 OMC 3.8 v6 exhaust manifold questions

    Closest I can see is mine are about 11/2" from the bottom edge to the center of the bolt head. Those OMC original manifolds, it looks like they ground the fwd part of them to clear those hydraulic mounts! I'm wondering if you tried the Barr manifolds but ground away just enough cast iron it...
  17. Lou C

    5.7 1987 OMC shuts off at Low RPM

    gotta see it running in the water...
  18. Lou C

    New motor knocking???

    Well it’s hard to say but normally you’d get noise suggesting that but of course it can be tough to track these things down. So I’d put some of that oil in a clear container and let it sit for a day & see if any water settles out. If not it could be assembly lube. These engines (Vortec) also...
  19. Lou C

    1985 OMC 3.8 v6 exhaust manifold questions

    some of these 2 piece manifolds for the 4.3 are thicker on the bottom, which is how the original OMC design was, but some of the aftermarket makes it thinner with more clearance..... sierra...
  20. Lou C

    New motor knocking???

    well that looks like water, I did not use assembly lube when I did my top end overhaul, what I did was just squirt Mobil 1 from my oil can on the cam lobes, lifters, pushrods, etc. Then before starting, I grounded the high tension lead of the coil and cranked it till I saw oil pressure on the...
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