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  1. Lou C

    89 4.3 OMC cobra stalling at WOT

    220 is waaay too hot! These have a 160* thermostat and an open cooling system they normally run at 160-175*F. Here’s mine in a couple pix You may have: Stuck thermostat Worn impeller Clogged up manifolds Clogged water outlets on the thermostat housing With the engine running on the water hose...
  2. Lou C

    Oil in gas/water in cylinders 94 Volvo Penta 4.3

    Sounds like you had 2 separate problems contributing to the overheat & hydro lock: impeller & thermostat not maintained Exhaust system not maintained As far as evaluating possible damage that is difficult. IMO you can take the cyl heads to a machine shop to have them checked for cracks and check...
  3. Lou C

    89 4.3 OMC cobra stalling at WOT

    An 89 might still have points ignition, have those been changed? The dwell angle is set first then timing then idle speed. This is a long shot but a defective tach can short out the ignition. You can try disconnecting the tach lead at the coil. Also about the burned exhaust hose, the 86-90...
  4. Lou C

    OMC King Cobra conversion to merc

    Yes it is and in fact there was a member here by the name of Rick who did a similar conversion on a Four Winns Liberator the originally had that same power package (Ford 460/Baby King Cobra). If your drive & transom assembly are in good shape they can be sold on eBay or whatever for pretty good...
  5. Lou C

    5.7 omc stalling while shifting

    Yes
  6. Lou C

    5.7 omc stalling while shifting

    That’s used in the auto applications if you have the large water separating filter like I do you should have the screen filter there. We had a 1975 Olds Delta 88 350 with the Quadrajet and that’s the filter we used.
  7. Lou C

    5.7 omc stalling while shifting

    well now you gotta go learn how breaker points igniton work. you set the gap when the dist. cam is on the high point, but then check with a dwell meter at idle speed. Gap & dwell are inversly related, small gap = large dwell angle. It is actually the degrees that the dist cam turns, when the...
  8. Lou C

    One manifold hot (5.0)

  9. Lou C

    One manifold hot (5.0)

    Get all your tools together If you don’t own a rechargeable 1/2 drive impact gun get one Start early don’t do it on a hot day Drink lots of water I’m lucky that I can remove the rear seats in about 5 min then take apart the wood support panels in 5 min it’s wide open. The benefits of older...
  10. Lou C

    5.7 omc stalling while shifting

    Ok do you still have points ignition? If so & the points haven’t been replaced in a while a bad condenser can cause what you’re experiencing. This happened to me once before. I usually Change points when they get pitted or it starts running bad out of the blue.
  11. Lou C

    One manifold hot (5.0)

    BTW I had this problem once when a cooling hose popped off the ps cooler on the back of the engine. Overheated the engine & filled the bilge with seawater up to the pulleys. When I pulled the boat both flappers were fried and those exhaust hoses looked OK on the outside but were burned up on the...
  12. Lou C

    4.3 volvo penta flywheel problems

    glad you got it and it was a simple solution in the scheme of things....
  13. Lou C

    One manifold hot (5.0)

    If it burned up an exhaust shutter then it can burn up the rubber exhaust hoses that connect the elbow to the exhaust down pipe and Y pipe. If that happens water can leak or flood into the boat depending on how hot it gets. Fix it now, would be my recommendation. Those hoses can look OK on the...
  14. Lou C

    One manifold hot (5.0)

    Might want to start with the thermostat housing make sure you get equal flow out of both sides of it, then if that's good move on to the manifold/elbow on the side that was hot. Just pick up spare gaskets before hand. These raw water cooled systems can pick up a fair amount of crud depending on...
  15. Lou C

    5.7 omc stalling while shifting

    Here's a couple of pix to show what's what with the design of the Quadrajet...
  16. Lou C

    5.7 omc stalling while shifting

    Well if you have the standard OMC set up, there is a large cannister filter mounted near the mechanical fuel pump and there is really just a screen filter in the carb inlet of the Quadrajet. I would fix the leak, for sure, if you have the cannister water separating filter, you probably can run...
  17. Lou C

    5.7 omc stalling while shifting

    It's hard to say not seeing what it's doing but with the OMC Cobra system, the ESA will lower the idle speed from approx 600 to 450 rpm when you shift from FWD or REV into neutral. If the engine is not in good enough tune to run that slowly then it can stall. So you need to address any carb and...
  18. Lou C

    MerCruiser 5.7L Low-ish Compression

    And also if you have an advance timing light check the total timing advance against Merc's spec.
  19. Lou C

    One manifold hot (5.0)

    Well perhaps the elbow started clogging first, then water flow was reduced on that side and the hot exhaust gas with not enough water flow melted the flapper resulting in what you found. I leave an IR temp gun on the boat so I can take temp readings at idle, just after coming off plane, to keep...
  20. Lou C

    MerCruiser 5.7L Low-ish Compression

    Yes & yes
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