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  1. S

    4.3 no start: starter whines and spins freely

    I checked all the plug gaps, and set the idle speed screw (just touching cam) and idle mixture screws (1 1/4 turn out). I cannot check the idle timing if it's not running, however it was running previously and no adjustments were made. It started right up on the first try, ran for 15...
  2. S

    procedure to manually flush non-running 4.3 engine?

    It started up in seawater for 30 seconds or so then stalled out. I couldn’t get it started for more than a few seconds when I got home to the muffs
  3. S

    procedure to manually flush non-running 4.3 engine?

    Is there a procedure to manually flush salt water out of the engine without a running engine? I really don't want salt water sitting in there until I can get it running! I know I can pull the blue plugs to drain, but can I remove the hoses from the thermostat housing and force fresh water...
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    4.3 no start: starter whines and spins freely

    I have a Thunderbolt V ignition.
  5. S

    4.3 no start: starter whines and spins freely

    I have not confirmed sparks, but it did start and run. Would that be possible without good sparks? Also, I had a storage water/bilge issue with lots of corrosion. I replaced carb, starter, plugs, wires, cap, rotor, coil. Maybe fuel pump?
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    4.3 no start: starter whines and spins freely

    Replaced the starter. Engined fired up almost immediately, ran for about 20-30 seconds, then sputtered out. I had backed off the throttle after it started to about 1k rpm, but that was not at idle. I was unable to goose it back up. I was also unable to restart it. I tried first without...
  7. S

    4.3 no start: starter whines and spins freely

    New starter on the way. Does this flywheel look "normal", or is this indicating greater issues? FWIW, the engine fired up and ran. thanks.
  8. S

    4.3 no start: starter whines and spins freely

    I read: if the starter motor spins but fails to crank the engine, the causes wad corroded or gummy Bendix drive. so, I pulled the starter: Despite the appearance, the plunger does move up and down, though I cannot say if it's "free". Seems like an obvious candidate for replacement. I've got...
  9. S

    4.3 no start: starter whines and spins freely

    Hi All, After engine started fine, then stalled, then restarted, then stalled... my starter started to make this whine with no apparent engagement of the engine. Is this a broken starter or the connection to the flywheel? Also, is there a procedure for flushing saltwater out of a non running...
  10. S

    spring vapor lock?

    It's not working fine, and I don't know if I should start a new thread ??? My new reman carb fired up great yesterday, ran 10 min. low idle at first, but then fine after warming up (it's been that way for a long time). Today, I tested it again. fired up, but the idle was lower (350ish), and...
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    spring vapor lock?

    It's in and working fine. Fired up immediately. Thank you for the evolving assistance. You good people enable me to own and maintain a boat, which I probably couldn't afford otherwise. Conclusion: storage mistake leads to corroded components. cleaned and reset exhaust manifolds...
  12. S

    spring vapor lock?

    excellent - thanks. Do I need to connect the overflow to something?
  13. S

    spring vapor lock?

    this is on the back the original appears to have been removed "289" and "281" imprinted on the throttle valves underneath
  14. S

    spring vapor lock?

    I wound up purchasing a Carter AFB-4.3L-Marine-Electric Remanufactured 4 Barrel 4.3L Marine Carburetor - Electric Choke, Carter-AFB. It's virtually identical to the one I'm removing except that it has a shiny pewter like finish instead of the painted (sealed?) version. It also has a fuel...
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    spring vapor lock?

    Perfect. Thanks.
  16. S

    spring vapor lock?

    Is this compatible with the 1406 or other part number? Trying to source a local replacement. Thanks
  17. S

    4.3 firing order - this sequence looks wrong

    Upon further inspection, it IS possible that I switched the #2/#4 wires (there is sufficient length to reach either way), which would make the correct sequence: Is this more likely?
  18. S

    Exhaust flapper fell down in the exhaust tube

    Been there - done that: https://forums.iboats.com/threads/how-to-get-flapper-out-of-4-3l-pipe-without-pulling-bell-housing.619200/#post-4561922
  19. S

    4.3 firing order - this sequence looks wrong

    BEFORE removing any wires, I traced them all, and this is what I found: The numbers correspond to the FWD numbers on the distributor cap. I would expect some symmetry, and this just seems off. I replaced the plugs recently, and marked them, and this is also the only way the existing wires...
  20. S

    spring vapor lock?

    Thank you!
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