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  1. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Double check your tach
  2. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    I'm out of ideas what could cause it Same 22P prop, same rpm at WOT If the ratio was higher (2.0 or 1.8) then the prop would be spinning faster and would be going faster unless the prop has cavitation. If there is air getting to the prop from to high trim, or other method it would allow the...
  3. alldodge

    Stalls out on idle after 30 to 45 minutes. Mercruiser 4.3 TKS Thunderbolt V Alpha II

    Vapor lock doesn't happen with the carb, would need to be EFI or MPI The problem is the carb needs rebuilt again or adjusted The float can be adjusted correctly but the needle seat could be leaking. The carb has to much fuel in the bowl and this is the reason it drips and or floods
  4. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    If your using the boat speedometer then it could be its most likely doing the same as before, just the issue with the pickup hole in the drive. Might be partially clogged. Now if your using a GPS then I need to scratch my head some more :unsure:
  5. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Your getting 20 mph at WOT, meaning rpms go to 4800. You should also have to reduce the throttle because the motor will over rev, correct?
  6. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Maybe I should retract for a minute. With the old drive was the boat on plane at 25 MPH? With new drive at 18 MPH is the boat on plane or plowing? Can you get WOT of 4800 rpm
  7. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Not finding where a 1.81 tooth count for a diesel is different then the standard. Even the X drives are 29/27 With 22 props the slip is real bad
  8. alldodge

    Volvo Penta overheating issues

    Might be sucking air or other Have you verified it is over heating with an IR temp gun measuring the thermostat housing? Get a piece of clear hose and a barbed hose fitting at the hardware store. Place the short piece between thermostat housing and hose from the raw water pump.
  9. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Going from 2.2 to 1.8 your rpm's will be lower and speed would be higher. The 1.81 would have 29/27 gears in the upper For the rpm's to go up and speed down using the same props, the ratio would be higher What pitch props do you have?
  10. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Bravo ratios
  11. alldodge

    power trim

    Something is worn and probably needs replacing
  12. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Your new lower may be 13x24 giving you a 2:43 ratio. The old may have been 16x27 To determine ratio without disassembly pull the kill switch (if you have one) or disconnect wires from the coil, Also need a helper Mark the prop and the crankshaft pulley or balancer Remove protective cover off...
  13. alldodge

    winterizing question

    From the GXI manual
  14. alldodge

    350 Mag MPI intermittent rough running.

    Engine coolant temp Your motor has one for the gage and one for the ecm. The ECT is for the ecm
  15. alldodge

    350 Mag MPI intermittent rough running.

    Should not be any issue with emissions
  16. alldodge

    Stalls out on idle after 30 to 45 minutes. Mercruiser 4.3 TKS Thunderbolt V Alpha II

    At idle one riser will always be hotter then the other, and more so on a hose. Depends on the person but about 120* is pretty warm, 130* starts to burn
  17. alldodge

    Bravo yearly maintenance

    Shouldn't need to crimp lube bottle if you pull drive before draining. There will still be air in the drive unless its laid on its side with the vent up and finish filling The shift linkage should move to out when drive starts to separate and stay that way until its ready to reinstall. If it...
  18. alldodge

    First time water in bellows

    Pulled the bearing and as before, its smooth just doesn't have much grease left in it. Sealed bearing my back side. If it was greasable, I would have just done that and be good to go
  19. alldodge

    350 Mag MPI intermittent rough running.

    Really need to get a scanner and look at real time data. Can still be a few things, ECT, TPS, vacuum leak, injectors, something else
  20. alldodge

    bravo magnum - convert to accept trim senders?

    Could use a serial number to make sure, but the Magnum doesn't have trim senders. The later version called the HP assembly used a single 3 wire trim and switch. It was used with digital gauges. Mine is the HP and I have the single sender and also installed the Digital to Analog Merc...
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