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  1. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    This is my assumption. Only way I know to verify is by doing a air pressure regulator test I mentioned previous. I know this works because @tpenfield has done it and it works
  2. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    Reg should release pressure above 43 (at least no lower then 40) Is your gauge accurate? Use air pressure with known good gauge and regulate pressure to compare I don't see it being the filter, you replaced with one FT mentioned and there was no change With Reg not getting any vacuum then...
  3. alldodge

    Possible water intrusion or lean sneeze?

    The top cylinder is not firing and is being flooded with gas. Probably so much gas that even the plug can't ignite the gas. Check the carb
  4. alldodge

    Impeller Job - Mating Surface Corrosion

    Agree, post 11 has best link to find parts, the others don't always have all updates. Heck the other sites still don't have my motors showing up because they are to new I guess
  5. alldodge

    bravo III milky oil but holds pressure for days

    Was it all milky as in a lot of water or just a little? If just a little then there might have been something that got next to the seal causing it to leak. Then after a bit of running it stopped. Could put 2 to 3 in of vacuum on the drive and try to see if it holds. If drive gets real hot (many...
  6. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    Things just don't add up with pressure You can pinch off the return hose and pressure goes up close to 60. Can keep it slightly closed to get 40. With pump jumped and motor off you get 40, but with it running you get 33. The regulator should be set at 40, so pinching off line more should not...
  7. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    With motor off and pump running you get 40 psi, but when motor is running you get 30 psi, correct? Any time fuel is released from gauge there is a lot of bubbles, correct? I don't see an issue with lower voltage at the pump, your good there
  8. alldodge

    coast guard ratings plate

    Only boats that are 20ft or less require the plate. Yours being a 21ft it is not required
  9. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    Doing this is not going to prove anything
  10. alldodge

    Yamaha cavitation plate repair

    Same answer, JB is good stuff but will not hold up under a torque load. The Cav plate riding straight will get vibration, but in a turn there will be more loading and vibration and IMO don't see how it will last. As always this is just my opinion, no direct test knowledge
  11. alldodge

    Mercruiser 3.0 Distributor posotion and Timing

    Firing order is 1-3-4-2 and rotor turns clockwise If it's near 4 then dizzy needs to be turned, pulled and reinstalled or move plug wires on cap to align with number one. Also note the mark for TDC on the damper comes around twice so the motor mat be on TDC of the exhaust stroke. If it's on...
  12. alldodge

    Yamaha cavitation plate repair

    5200 is great but not that great, it might hold for a while, but not that long Sandwiched plates will hold but may also cause cavitation because of the edge on the lower side. The water flowing under it may cause bubbles and then you just lost some slip
  13. alldodge

    Confused New Owner of an Old Boat

    Welcome The motor is a 250 cu in inline 6 with 165HP, Merc uses its HP rating The serial number on the drive can be used on many motors. This LINK shows the 165 with same serial number band
  14. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    ok, try this; take the one you have replaced and do the test I mentioned above. I'm I would bet a lion light it's a 30 psi reg
  15. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    BTW are you buying the Regulators from a dealer or ebay? Dealer/Merc cost is $183
  16. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    Check voltage to fuel pump at the fuel pump relay or fuel pump. You have 2 relays on top the motor, one is main power relay (MPR) and other if FP. Turn relays over and which ever one the Red/Purple stripe wire, that's the MPR. The FP relay has a Pink/Green and a Pink/Yellow wires. Pink/Green...
  17. alldodge

    Low Fuel Pressure 2005 Mercruiser 4.3L MPI

    The Reg should have a Blue ring on the vacuum port Try and test it. Remove Reg and take to the bench. Use a air compressor and air regulator. Can use a air nozzle with a rubber tip. Place rubber tip on Reg port and slowly increase air until air starts to escape on the fuel line port. It should...
  18. alldodge

    Sea King 5 hp Questions from a newbie

    Sure don't, never had a sea king or one like it
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