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  1. nola mike

    Engine rpm is not stable below 2000 rpm

    And I was severely lean running Rick's setup, even though we have the same engine. The recommended calibration kit (forget the numbers off hand) I think is for the pre-vortecs, and possibly the vortecs need a richer jetting. FWIW, Michigan Motorz uses the 1409 out of the box (which is allegedly...
  2. nola mike

    Overhauling my 1988 Alpha One Drive Train

    I have a few circular brass brushes for this kind of thing. Typically used for cleaning gun bores.
  3. nola mike

    Waterproof engine compartment?

    I'm not sure if I have the clearance necessary for something like that, but yeah, that's the general idea. I'm worried about the heat in the engine compartment though.
  4. nola mike

    Waterproof engine compartment?

    So a few years back I reconfigured the traditional back-to-back lounge/2 jumpseat configuration on my bowrider. I put in a sundeck and L-bench seat in the stern, and 2 captain's chairs in the front (wow, what a difference BTW). Problem is that the seams in the sun deck allow water to drain into...
  5. nola mike

    Merc. MPI 300 Water Leak-Water Distribution Housing? & Winterization Question

    Anybody have a diagram? I don't see that design in manual #25 (most recent I have)
  6. nola mike

    4.3 Mercruiser Spark knocking at high rpm

    4800 is what you *should* max out at. There is no rev limiter. But I seriously doubt you're actually at 6k. You need to verify your readings with another tach.
  7. nola mike

    Overhauling my 1988 Alpha One Drive Train

    It isn't a standard bolt (standard size, but not a hardware store find)
  8. nola mike

    Need help with my 3.7l mcm 180

    He thought it was seized when he was trying to start it in neutral. I'm not exactly sure of the problem he's having
  9. nola mike

    470 coolant pressure test

  10. nola mike

    Need help with my 3.7l mcm 180

    Then it probably isn't seized
  11. nola mike

    Mercruiser 4.3 cracked intake manifold

    Or snap a bolt off in the head (ask me how I know that one)
  12. nola mike

    Need help with my 3.7l mcm 180

    It will be hard to turn in gear... Did you try putting it in neutral?
  13. nola mike

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    Yes What's with with the current engine?
  14. nola mike

    Mercruiser 4.3 cracked intake manifold

    Still have it, though the interior is redone with a different layout and the 4.3 replacing the 3.7
  15. nola mike

    Mercruiser 4.3 cracked intake manifold

    You don't need any sealant for the gaskets
  16. nola mike

    Mercruiser 7.4 from 1999 will not start (starter not turning), sometimes

    Naw, no sensors from what I see on that engine that would do it. The yellow/red should energize the slave solenoid. That wire gets 12v when the key is turned to start. The neutral safety is between the ignition switch and slave. You're saying you jumped across the safety switch and it still...
  17. nola mike

    Losing Power - After two hours

    I mean, if the rubber is melting somewhat and then solidifying when it cools back down...I don't know if this actually happens, and I can't imagine it would do it for many cycles
  18. nola mike

    Mercruiser 4.3 cracked intake manifold

    Yeah, dunno the reason, but it isn't a standard drain plug, and it's horizontal, and there's a lot of room in there for water to expand. Would be odd for omc to have a TSB and not merc if the manifold and potential issues are the same. Maybe @achris knows of one?
  19. nola mike

    Losing Power - After two hours

    So if you're ACTUALLY at 4k rpm and 10 mph and it isn't the prop, coupler is the only other option. Your gauge issue makes me think you might not be there though. At 4k rpm, the engine should sound like it normally does at 4k rpm.
  20. nola mike

    Mercruiser 4.3 cracked intake manifold

    I don't think this is the case. I've drained the block at least 6 times now. Removed the plug maybe 3-4 times, got zero water out. If you pull the t-stat hose, I can't imagine that enough water can accumulate in that large section to crack. Even without pulling the hose that area must be the...
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