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  1. S

    4.3 tb IV no fire from coil

    My carb is acting up to keep shutting off ima do the compression test and get this carb cleaned. And another problem arise it’s running hot impeller was good in one piece changed it anyway. Getting water thru the inlet hose removed thermostat still same, barely any coming from pump so ordered...
  2. S

    4.3 tb IV no fire from coil

    She ran hot last night while cruising and oil pressure shot up ima change impeller today
  3. S

    4.3 tb IV no fire from coil

    Ok so I am back with an update changed propeller to a 19 still only getting 3500 rpms and 30 mph a 17 pitch was too small wouldnt plane
  4. S

    4.3 tb IV no fire from coil

    Can I wire a digital tact in
  5. S

    4.3 tb IV no fire from coil

    Thank you so much I appreciate all the help and the knowledge ima def go buy a 17 then
  6. S

    4.3 tb IV no fire from coil

    I dnt see it
  7. S

    4.3 tb IV no fire from coil

    Have no idea where to look for the drive ratio but I did notice that this isn’t the prop for this boat!!! The fin that’s above the propeller was removed because the prop would hit it I took the 19 off my 3.0 merc
  8. S

    4.3 tb IV no fire from coil

    Here’s numbers
  9. S

    4.3 tb IV no fire from coil

    Here’s prop
  10. S

    4.3 tb IV no fire from coil

    Quick silver laser 2 yes it has vents and 3 blades tabs are manual
  11. S

    4.3 tb IV no fire from coil

    It’s a quicksilver 48 16546 A40 21p
  12. S

    4.3 tb IV no fire from coil

    Looked at prop it has a 21 p shall I try a 18 or 19 p
  13. S

    4.3 tb IV no fire from coil

    Mabe the pitch is too low because she shoot right out up on a plane also have tabs on the back
  14. S

    4.3 tb IV no fire from coil

    It’s a 20 ft so how do I check the engine revs? And what am I looking for
  15. S

    4.3 tb IV no fire from coil

    Thanks everybody I’ve figured out why it wasn’t getting fire. The safety or man overboard switch was erratic so I bypassed it temporarily and voila it started. Now I have to figure why I’m only hitting 4000 Rpms n 32 mph!!! I think mabe my carb isn’t opening up all the way? Idk never had a...
  16. S

    4.3 tb IV no fire from coil

    Sorry yes I cleaned the connections now I’m getting 12 volts at the coil still no fire
  17. S

    4.3 tb IV no fire from coil

    Yes the firing order is correct , I replaced the coil and drove for a few hours. So I replaced the sensor inside the distributor cap still no fire, I check the red/ white lead from dist to ignition module and it’s only 11.7 volt!!!!! Would that be the ignition module
  18. S

    4.3 tb IV no fire from coil

    Had some time to play around with the boat, I noticed my batt is only 12.5 volts the ignition is reading the same voltage but when I click it over to accessory it drops to 11.4 could the switch be the problem. Wait on my cuz extra hand to do the other test
  19. S

    4.3 tb IV no fire from coil

    Bought the boat replace coil cap rotor button plugs she fired right up took it out wouldn’t go over 32 mph at 4000 rpms couldn’t get any higher rpm either come back in 2 days later she wnt start was reading 11.7 volts at coil and red and white wire coming from module on exhaust manifold put plug...
  20. S

    1989 MERCRUISER 4.3 V6 WONT SPARK

    Have the same problem except mines was reading 11.7 volts at the coil getting no spark
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