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  1. Scott06

    Quadra Jet: cross threaded fuel intake fitting

    Here is a video putting a helicoil in these guys di the repair as a service https://quadrajetparts.com/service-fuel-inlet-thread-repair-heli-coil-installation-p-355.html
  2. Scott06

    97 Bayliner 1950 Capri

    A 21" in a 19 ft boat would be slow out of the hole for sure. The 19" should put you in the right direction unless it has a ton of cup (lowers slip and thus wot rpm). I would think you would gain 300 -400 rpm at WOT.
  3. Scott06

    Where do you like to prop your boat?

    Really depends on how you use your boat I’m assuming the performance currently is reasonably satisfactory? If like me you prefer more hole shot for water sports etc. It may be worth trying a set of 25s. I think some folks on here with bravo threes have had luck with the hill marine 4 x 4 set up...
  4. Scott06

    97 Bayliner 1950 Capri

    Wouldn’t assume anything, surprised a dealer would install a new engine and leave it only making 4 k rpm at wot. If you’re confident in the engine try to find prop markings or see if you can test your friends 19” prop.
  5. Scott06

    97 Bayliner 1950 Capri

    Would think it would a 19” somewhere on it there will be some markings you may have to remove the prop and splined washer to see it down in the hub on top of it first you want to verify the tach is accurate if it is truly only getting 4000 rpm then you are down on power or really over pitched...
  6. Scott06

    y pipe leak or something else

    It where cooling water is feed through transom housing up to the engine there is a plastic 45 ish deg elbow on the transom housing that is what the hose attaches to . Could be the plastic fitting cracked gasket leaking or hose split as previously outlined need to get in close while running or...
  7. Scott06

    Carb Recommendations for 5.7L Vortec?

    Several brackets and throttle cable adapters here https://www.michiganmotorz.com/products/marine-parts-accessories/carburetors-renew-kits/throttle-brackets-miscellaneous are you just test running this or permanently mounting ?
  8. Scott06

    Mercarb idle speed screw and adjustment

    I dont know this is only my theory which may be wrong
  9. Scott06

    Mercarb idle speed screw and adjustment

    I also get the same with my Edlebrock 1409. Probably not the answer you want to hear but I suspect the passages in the accelrator pump circut or venturis dry out and have no gas until you accelerate and run some through. If it works really well in all other phases I would leave it allone or...
  10. Scott06

    TB V Questions

    OEM merc https://www.michiganmotorz.com/mercruiser-ignition-coil-hei Aftermarket https://www.michiganmotorz.com/thunderbolt-iv-v-hei-ignition-system-coil call MM if yku need answers regarding external resistors
  11. Scott06

    replace Mercarb on 4.3 with Rochester?

    We wouldnt pay $900 either. Hesitancy others expressed is abut who is rebuilding it and what parts are being used. Not trying to make this more complicated but would hate to see you have the same issue with another carb. Where exactly is fuel coming out of it? If you haven't measure your fuel...
  12. Scott06

    Gimbal bearing mystery

    dont over think it, just greasing a bearing ...
  13. Scott06

    Need a noise diagnosed…

    dissconnect the acessory belts and run the engine briefly see if it goes away. If it does it is one of the acessories or water pump
  14. Scott06

    replace Mercarb on 4.3 with Rochester?

    gas pouring out could be needle and seat /damaged float, or you have too high fuel pressure or if mechanical fuel pump has a ruptured diaphragm
  15. Scott06

    Gimbal bearing mystery

    yes best to grease while running, I idle mine and give it 5 or so pumps of grease
  16. Scott06

    replace Mercarb on 4.3 with Rochester?

    Depending on where the fuelinlet on the mercarb is and where it is on teh rochester you may have to bend or make a new fuel line to meet up on the adjacent side of the carb. The two carbs shar a common lineage as merc started with the mercarb after GM/Rochester stopped making carbs in the late...
  17. Scott06

    1994 bayliner reflex w/sport jet 90

    You may need to disassemble clean and rebuild the carbs. Likely you may be running lean. What do spark plugs look like ? running a jet out of the water even at idle will reduce the load on the engine as thee is no drag on impeller. My jet ski idles 1200 or so rpm faster on the trailer vs in...
  18. Scott06

    Need a noise diagnosed…

    hard to tell where its comng from but my inital thoughts are exhaust flapper which is in the exhaust down pipe just below the elbow , or lose rocker arm
  19. Scott06

    Fender for Shorelander trailer

    Mod Edit - Competitor removed.
  20. Scott06

    Mercruiser mpi ecu mapping

    Yeah feel the same way. I repowered 21 ft BR from a 4.3 to a 5.0, should have just stepped over the 5.0 and done a 5.7…. Biggest engine offered in my boat was a 5.0 mpi, thought a 5.7 would be too much, have yet to own a boat with too much power ….
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