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  1. K

    4.3 efi tbi throttle question

    Yea prop and hub is the only new thing same diameter/pitch brand model and did have the local prop shop check pitch old and new to verify that previous owner didn’t have the prop repitched as the local prop shop can go up or down 2” from factory on aluminum props they were the same cupping was...
  2. K

    4.3 efi tbi throttle question

    Put boat on a scale with trailer and empty trailer on scale it came out to 3120 factory specs say 2850 for boat weight and I did have some electronics In stuff in boat so I don’t think waterlogged always gets trailered and bottom paint is not perfect but it wasn’t perfect last year either even...
  3. K

    4.3 efi tbi throttle question

    My next thought was I’m not sure how the drive coupler exactly works if it’s kind of like a hub in a prop or what but could that be spinning some at higher rpm causing loss of speed or would that be something I’d most definitely know or something that would go KABOOM or could it have a slight...
  4. K

    4.3 efi tbi throttle question

    Prop does have a Flo-torque hub brand new that was my first thought as well pulled prop and checked no signs of hub spun
  5. K

    4.3 efi tbi throttle question

    Speedo is gps reading SOG And doesn’t seem like a cavitation/blowout on the prop
  6. K

    4.3 efi tbi throttle question

    Compression test 1-152 2-148 3-151 4-153 5-143 6-147 Fuel pressure 31psi at 2500 rpm Fuel filter/water separator all fuel no water
  7. K

    4.3 efi tbi throttle question

    I have a 79 Grady white 212 “21.5’ cuddy” last year boat would jump out of the water 2200 I was out of the water on plane doing about 20-25mph, 3500 was around 40-45, wot 4650-4700 was around 52-55 this year wot is still around the 4700 mark yet only getting 34mph and sluggish out of the hole...
  8. K

    2003 mercruiser 4.3 efi throttle body injected alarm and engine shutdown at idle/neutral

    And sorry I am not at the motor right now I can look and post the serial number later
  9. K

    2003 mercruiser 4.3 efi throttle body injected alarm and engine shutdown at idle/neutral

    But if the shift interrupter is retarding the motor slightly could that cause low oil pressure
  10. K

    2003 mercruiser 4.3 efi throttle body injected alarm and engine shutdown at idle/neutral

    So doing more playing around if I wiggle the shift interrupter once the alarm sounds it will stop and engine stays running
  11. K

    2003 mercruiser 4.3 efi throttle body injected alarm and engine shutdown at idle/neutral

    Okay I have a 2003 4.3 efi throttle body injected mercruiser that upon showing up to the lake will fire off easy and idle just fine to warm up after I push off the dock and toss in gear to head out I can almost immediately go back to neutral and it will run for 3 seconds then throw a steady...
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