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  1. nola mike

    2003 25 hp merc 2 stroke impeller replacement

    TL;DR : how do I drop the lower unit to change the impeller? Looks like the shift shaft is holding it on. Manual says disconnect the linkage near the cable, but on my remote shift model that doesn't release anything. Long version: My boat found a crab pot. Couldn't figure out why it would stall...
  2. nola mike

    4.3 Alpha One - Gimball bearing issue

    Get that one.
  3. nola mike

    1978 5.7l pre-alpha with alpha gen 1 drive over heating

    Not necessarily, and that's what a leak down test would show. Combustion gases are under a lot higher pressure than what you'll be pressurizing the block to.
  4. nola mike

    1978 5.7l pre-alpha with alpha gen 1 drive over heating

    The rest of your compression numbers aren't so hot either
  5. nola mike

    Mercrusier 350 MAG MPI - RPM issue under a load

    Just that you wouldn't expect a reading of 0 or 5v on the TPS even if all the way open/closed
  6. nola mike

    1995 Mercruiser 454 mag EFI SKI Temperature Sender

    Serial number for the engine.
  7. nola mike

    Hole shot, Mercruiser 4.3L

    Actually just realized I made a mistake in my OP. The bigger prop was actually 23p, and I've been using a Michigan 21p. The 4 blade was a 19p. All were fixed hub. I'm waiting on a new lock washer for the 4 blade, and needed a bigger socket than my 1 1/16 for the included brass nut. I think the...
  8. nola mike

    4.3 Alpha One - Gimball bearing issue

    I'm going with faulty gimbal bearing install. Doesn't look like there was water intrusion in the bellows that would rust the bearing to the shaft. Was the water in your shift shaft bellows? The rust I see is in the water passage, which is where water should be Edit: didn't see @dubs283...
  9. nola mike

    1995 Mercruiser 454 mag EFI SKI Temperature Sender

    We don't know what you're working on (same as your other post). Generally one is for the gauge and one for the alarm. Usually on the thermostat housing, tan wire
  10. nola mike

    Mercrusier 350 MAG MPI - RPM issue under a load

    Most/all 5v sensors don't operate at 0 or 5v (so somewhere in between) so that the PCM can tell if there's a disconnection/short in the circuit
  11. nola mike

    Water leaking from block but pressure tested fine?

    Aside from being undersized if it's a starter wire, what makes it unapproved?
  12. nola mike

    1998 Mercruiser 5.0 Intake manifold gasket mismatch issues

    Little salty for someone that doesn't know wtf the issue is and is soliciting free advice, no?
  13. nola mike

    2014 MPI fault codes 321 & 322

    Lazy o2 sensor could do that, not reacting quickly enough. Can you post the values at the time of the fault? Does your reader allow you to look at how quickly o2 sensor cycles, and min/Max voltages?
  14. nola mike

    Bow mount fuel tank. Balance?

    I think this might be more ballast in your boat than in most...
  15. nola mike

    Bow mount fuel tank. Balance?

    You can try moving your current tank to the bow and add some additional ballast to see how it would do
  16. nola mike

    Mercrusier 350 MAG MPI - RPM issue under a load

    If you're positive that this follows Pcms and it's reproducible when you disconnect the map, then this has to be an information problem to the PCM, right? But you need to be sure that it's reproducible (most of the time... Other times makes it seem like it's not) What's wot rpm when it's running...
  17. nola mike

    Mercruiser Alpha One Gen I Winterization

    Oof, looks like the floor is still in the way. You *can* probably reach from the front, but it will suck. Have some spare plugs handy for when you drop them in the bilge and a magnet won't pick em up. Good luck with the spark plugs.
  18. nola mike

    Mercruiser 470 Starter

    Yup, meant to follow up on this. I knew it was an auto pattern, makes sense that it's Ford. The newer 470s (3.7) do have an integrated solenoid with a slave, the earlier ones don't have the slave. Thanks for the correction.
  19. nola mike

    Mercrusier 350 MAG MPI - RPM issue under a load

    That doesn't make sense to me. Map temp should be exactly the same temp as what it is measuring, plus maybe a bit because of increased under cowling temps. Some auto pcms will lower fuel charge to account for lower air density at higher temps, though I think that that's more heavily weighted in...
  20. nola mike

    Battery discharge. ...normal?

    Ha, this solution never occurred to me. I've never owned a car or boat new enough to have a warranty.
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