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  1. Lou C

    Water in oil

    Water in the cyls eventually will get into the motor oil and crankcase. I had 2 blown HGs letting water in to the cyls (#2 and just a little in #1) no leaks from anything else and I had the same water in the oil under the valve covers as you did. You won't see it on the dipstick right away but...
  2. Lou C

    Water in oil

    Those shoulda been tossed FOR SURE. But water in the engine can have more than one source. Did you have water in the cyls, rusty spark plug electrodes? Likely from what I see there. If those sealed it would have been a miracle. What the sealing surfaces look when new for the OMC/Volvo style...
  3. Lou C

    To fuel filter or not. 3.0

    I took my old pump apart, there is no filter inside of these. It is exactly like the same old diaphragm pump used by Chevrolet on those engines since the '50s, just with the extra fitting to prevent fuel from leaking from a bad diaphragm into the bilge. However, it looks like Merc did use a...
  4. Lou C

    Overheat

    Check for water in the cyls and in the motor oil; signs of a blown head gasket
  5. Lou C

    To fuel filter or not. 3.0

    I don't think you're right about that, I have a pic here to show you what a 4.3 marine mechanical pump looks like, just like the V8 pump but mounted upside down. Old one is OE Carter, new is Sierra aftermarket, I also have a new Carter one, looks exactly the same. So no integral filter on these...
  6. Lou C

    E15 Gas experience

    The bigger issue is the is something that is inherent to using a gas/alcohol mix: inaccurate mix by tanker truck drivers when the E-10 change over started here in 2004 or so, samples were tested and many had more than 10%. That combined with the cleansing effect of ethanol caused big problems in...
  7. Lou C

    Water in oil

    this was discussed on the other thread, the intake gaskets are suspect, that will put water right into the cam valley & motor oil.
  8. Lou C

    Cooling system question

    You might want to back flush it from the impeller hose at the housing, back ward to the outdrive. Those drives have a clean out that can be removed so you can do that and any crud in the PS cooler could be flushed out that way. The other thing that can cause that (low raw water volume) is rotted...
  9. Lou C

    I/O to outboard conversion

    Cost, late model outboard are expensive, unknowns, will the boat have correct balance, it is a lot of work for unknown outcomes. That boat would be well powered with a 4.3 V6-4bbl if you want to get away from the 470 engine but you have to change the front engine mounts, but might be less work...
  10. Lou C

    Water in oil

    If you pull the spark plugs and crank it over would see if water got in via the cyls or not. Always good to do diagnosis before dis-assembly. Merc had a service bulletin explaining how to check for the causes of water in the oil and/or cyls. On mine it was blown head gaskets from an overheat 3...
  11. Lou C

    2.3 timing belt

    You can use the Merc/Quicksilver High Performance Gear Lube. Just make sure to refill it the correct way, most of them take about 2 qts of gear oil.
  12. Lou C

    Water in oil

    https://www.summitracing.com/parts/fel-ms901312/make/chevrolet I think this is what you need, there are marine head gaskets (hope you used those!) but I don't think the intake gaskets are marine specific, Fel Pro is one of the better brands, just be careful with the torque. I used their marine...
  13. Lou C

    Water in oil

    Well when I did mine my cyl heads sealing surfaces were perfect because they were new reman units. My intake manifold was original, there was slight pitting on the water port area that I cleaned up but still I used some Permatex Aviation gasket sealer on the gasket in those spots. The pre-Vortec...
  14. Lou C

    To fuel filter or not. 3.0

    see my post on the 2 different pumps used on the 3.0. One had an integral filter (used by OMC and Merc) the other did not (used by Volvo Penta). The integral filter may, or may not be adequate for your conditions. If in a damp climate and forced to use E-10 fuel like we are, I would use a...
  15. Lou C

    To fuel filter or not. 3.0

    Correct and the only pump I have ever seen that used a built in filter was on the 3.0. None of the others to my knowledge had that built into their pumps. Probably because the marine pumps for the V6 & V8s were based on automotive pumps, that were modified for marine use so had to use the add...
  16. Lou C

    To fuel filter or not. 3.0

    With the same base engine Volvo Penta used a spin on canister filter. The confusion might be from the fact that older versions of the mechanical pump did have a smaller filter built in; the V6/V8s did not.
  17. Lou C

    To fuel filter or not. 3.0

    And you only need a 10 micron for EFI engines; for carbed 20 is fine. Don’t overthink this
  18. Lou C

    To fuel filter or not. 3.0

    If that’s the case the cause was probably not changing the oil. Look at the spec on some of those filters. A Racor flows 90 gallons per hour!
  19. Lou C

    To fuel filter or not. 3.0

    The standard 20 micron filter canister is not a considered a fine micron filter. They are referring to something like a 2 micron filter. Not a standard 20 micron for carbed engines.
  20. Lou C

    Water in oil

    Yes that might be it. Might just have to change the gaskets and torque correctly.
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