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  1. Scott06

    1984 228 305 carb problem

    Thats his MO… must be making up for other inadequacies
  2. Scott06

    1984 228 305 carb problem

    Very true. video your carb...at 900 rpm if properly set up no fuel will be coming out of the venturis
  3. Scott06

    Merc 5.7 Keeps Shearing starter bolts

    Did you figure out why its hydro locked you may have water in oil now and time is ticking if you got water in the engine
  4. Scott06

    1984 228 305 carb problem

    Agree on the idle speed, but at 900 rpm the carb will still be on the idle and transition circuit. on a properly set up carb you wont see fuel coming of main venturi until 1800-2000 rpm give or take… you can see this if you look straight down the bores and slowly open the throttle. Fuel flow of...
  5. Scott06

    No spark, 91 536

    If you didnt set the dwell after replacing points it may not fire. Read through what dubs posted. Points havent changed since 74…
  6. Scott06

    1984 228 305 carb problem

    Mine is a 65, the tripower can only handle about 3.5 psi. i found when i replaced my fuel pump the new one put out way too much pressure. if you are weeping of the venturis at idle its either fuel pressure too high or float/ needle and seat. might be worth post on cliffs q jet forum what fuel...
  7. Scott06

    Alpha one, noise from gimbal bearing area, new gimbal bearing, no water intrusion. Stumped!

    I would pull the drive off reinspect that gimbal is fully seated and the gimbal housing is not worn such that gimbal bearing can move in housing. Run the engine by stuffing a hose in water port on bellhousing see if noise is still present If it’s not present you know it’s the drive would...
  8. Scott06

    1984 228 305 carb problem

    You’ve checked most of the low hanging fruit I’m thinking your fuel pressure is a tad to high ? Is float water logged ? If you turn idle speed down thinking fuel pump being slower outs out less pressure ? Had the same thing in my gto this morning lowered the fuel pressure regulator half a turn...
  9. Scott06

    Oil Pressure Switch Necessary with the Sniper EFI?

    yes i would think that if you go off the blue wire (fuel pump 12 v supply in sniper wiring) that would meet the regulation If say the engine dies but key is left in run… the fuel pump should shut off. Thats what the oil pressure switch does. Would run that by holley. why would you want to...
  10. Scott06

    Proper prop??

    jimbo is steering you straight need to drop pitch 17” three balde should get you to about 4600 rpm if 4 blade would go 16 or 15” are u currently using aluminum ?if you want to pull skiiers try a michigan vortex 4 blade 16” i used one on my previous boat did wonders for holeshot
  11. Scott06

    Overheating issue.

    Good looks like a bunk sending unit
  12. Scott06

    Overheating issue.

    Also you replaced the thermostat and gasket. The oem merc thermostat housing gaskets have rivets in them to ensure continuity between the thermostat housing and engine. You may not have that if aftermarket gasket is used. More resistance to the gauge will indicate higher temps. if no rivet...
  13. Scott06

    4.3 mercruiser engine replacement

    Best to start your own thread or ask the mods to move it to a new thread... Yes you can go back in with a vortec motor. Exhaust manifolds are the same but need to check if yours are not cracked given other issues. Will need a Vortec intake as well. Can get a '96 and up truck engine swap marine...
  14. Scott06

    Mercruiser 260 Backfire Through Exhaust

    @Scott Danforth would know
  15. Scott06

    1989 mercruiser 7.4 bravo one

    entirely possible if engine was replaced with a partial engine over the years it is not in the factory Merc location. If you look at the photos of the rear of the engine in this partial engine package there is a bracket between distributor and carb where they are located in a lot of non OEM...
  16. Scott06

    Mercruiser 5.7 carbureted wont start when warm

    His carb is dumping a huge amount of fuel down out of the float bowl after shutoff.
  17. Scott06

    Mercruiser 260 Backfire Through Exhaust

    Good at least you know exactly what wrong . Hopefully you find a crack in the head not block…
  18. Scott06

    Struggling with Gauge Temp

    Exhaust elbow on top of exhaust manifold
  19. Scott06

    Struggling with Gauge Temp

    If that water tube seal is split you wer likely leaking water on discharge side of impeller pump, only would contribute to overheating by dumping cooling water into the exhaust stream and overboard instead of to engine
  20. Scott06

    Mercruiser 260 Backfire Through Exhaust

    I don’t think he tested the other manifold yet or at least only mentioned port manifold. Either way if the block and heads hold pressure no need to take them apart
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