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  1. nola mike

    4.3 Mercruiser fuel supply issue

    Yeah, as much as I'm tempted by a newer boat with an ob, a 21' with a 350 carb (or 383, why not) I/o would be tough to pass up from an ease of repair pov
  2. nola mike

    Shift cavity water...

    Didn't think of that. The o ring was still in place, but it will be replaced anyway. I'll pay attention to the bellhousing surface and clean it out. I coat it with grease, doesn't look like it washed it at all (you can see it a bit in the pic).
  3. nola mike

    Verify I have found all drain points

    I've removed this a few times and had zero water come out. The cavity in the manifold is large as well with plenty of room for expansion. Fwiw merc doesn't mention pulling this plug either.
  4. nola mike

    Shift cavity water...

    Pulled the drive the other day. Had been dealing with a sticky shift shaft cable that had been worsening throughout the summer. Pulled the drive mid-summer and the cable seemed ok, so I pulled the inner, wiped/dry lubed and replaced (the cable is only about 2 years old, but got dunked with the...
  5. nola mike

    4.3 Vortec Harmonic Balancers...

    Either balancer will be fine. I'd take a used auto motor over a marine any day. Marine engines are driven much harder than auto, and that doesn't even count the (usual) open cooling corrosion and generally harder environment/op conditions
  6. nola mike

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Imma channel my inner @Scott Danforth here and say... Rebuild your original
  7. nola mike

    Pumping out oil from dipstick

    Best thing I did when I replaced my engine. Changing that filter would be a nightmare on this engine
  8. nola mike

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Ok at this point I'd check the vacuum again... That bouncing would make me think a valve isn't seating. Confusing at this point... Your compression and leak down look good now
  9. nola mike

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Yeah, that's why I suspect his numbers are wrong. A 104 psi is leaking a lot from somewhere, right?...shouldn't have normal leakdown numbers. If you can't build good compression, you're by definition not sealing the chamber well.
  10. nola mike

    For those thinking about an engine swap...

    What vintage 4.3 did you go with? What's your WOT rpm? You should have at least had to reprop if you kept the old drive.
  11. nola mike

    1986 Mercruiser 470/170hp/3.7L Carb backfire, low vacuum, other weird issues

    Did I miss the part where those compression #'s were addressed? 14mm is still poor vacuum. I can't tell if my video is laggy or if that's the motor, but it looks like your vacuum is low, fluctuating, AND having a sharp drop (HG, rings, burnt/sticky valves?). And your leakdown test numbers are...
  12. nola mike

    Fogging thru carburetor

    Ok Boomer 😀
  13. nola mike

    Mercruiser Vacuum Gauge

    I hooked a vacuum gauge up when I was initially tuning my carb. Never took it off. It's helpful for setting idle, can give you a warning if you have valve problems. In combination with my a/f gauge I can tell when I go from lean-->rich on my carb rods, and also what spring strength I should be...
  14. nola mike

    winterizing a mercruiser 3.0 with sterndrive kept in water year round

    Any reason not to just pull the plugs every time? I can drain the blocks and manis on the 4.3 in about 30 minutes (most of the time spent remembering where the drains are). If I was doing it regularly I'd put in a few ball valves and do it in a minute.
  15. nola mike

    . . . and I Thought Hi-tech Boat Engines Were Bad . . .

    Wow. My '02 330 had 235k on the original clutch when sold, truck was replaced at 215k
  16. nola mike

    . . . and I Thought Hi-tech Boat Engines Were Bad . . .

    Mini cooper @85k has the clutch slipping already. I bought it at 55k and do almost no city driving. Apparently it's dual mass: paper mache and dreams/bubble gum
  17. nola mike

    First Aid Kit

    I honestly can't think of anything in a first aid kit that would be of use during the hour it would take to get home . I have rags and duct tape, you can always improvise a splint or tourniquet . Tourniquet would be the only thing that would possibly be life or death. Anything else is just to...
  18. nola mike

    Trim pump wiring acting opposite

    Nice to get the wiring correct so you don't totally confuse the next guy. Especially when you're the next guy and don't remember what you did
  19. nola mike

    Working During Winter

    Wouldn't work (maybe, there's been heated discussion about this over the years) because impeller (maybe) wouldn't pull water from the trash can. It would be interesting to submerge it and pull the supply hose to the engine and see if you're getting flow. Otherwise on what af you're using, 50/50...
  20. nola mike

    4.3 Mercruiser Crank, No Start

    Purple wire is always hot with ignition on. Purple/yellow supplies the FP, purple only goes to the switch
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