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  1. 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?
  2. 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
  3. 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
  4. 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.
  5. 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?
  6. alldodge

    mercruiser 7.4 mpi can't figure out the ratio

    Bravo ratios
  7. alldodge

    power trim

    Something is worn and probably needs replacing
  8. 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...
  9. alldodge

    winterizing question

    From the GXI manual
  10. 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
  11. alldodge

    350 Mag MPI intermittent rough running.

    Should not be any issue with emissions
  12. 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
  13. 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...
  14. 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
  15. 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
  16. 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...
  17. alldodge

    bravo magnum - convert to accept trim senders?

    ok, so Bravo magnum gimbal ring
  18. alldodge

    bravo magnum - convert to accept trim senders?

    What does TO stand for?
  19. alldodge

    alpha 1 gen 1 water pump issue

    The pump can only supply the amount of water the muffs will supply. It will supply more with boat in the water. Turn the hose on and see how fast it fills the bucket direct from the hose
  20. alldodge

    Second Happiest Day . . .

    A 150?
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