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  1. alldodge

    Trailer wiring plug

    Welcome White is ground Brown is tail lights Green is right brake Yellow is left brake
  2. alldodge

    Wont go past 2500 rpm

    Your motor doesn't have a in neutral/gear switch according to the serial number
  3. alldodge

    Wont go past 2500 rpm

    That may or may not be an issue. It's a GM part and may be able to get it from a GM dealer. It's a 1 Bar (1 atmosphere) pressure sensor
  4. alldodge

    Wont go past 2500 rpm

    Do make sure the electrical wires and connections are good. A bad connection will give same issue
  5. alldodge

    Wont go past 2500 rpm

    Searching around using old number I found one at walmart for $97, do look around https://www.walmart.com/ip/Sensor-MAP-Sensor-GM-V6-V8-MPI-Mercruiser-Indmar-1998-Up-Pro-8817-Cross-Ref-881731-8M0054726-18-7660-3861321-556102-8M0054726-861249-861249A1/905199679
  6. alldodge

    Wont go past 2500 rpm

    The MAP circuit is causing a problem, and can be the MAP or the circuit. In most cases it is the MAP but look close at it to see if it has already been replaced by prior owner Merc does really like there parts, really high Original was 861249A1 Updated one is 8M0186195 $280 Item 12...
  7. alldodge

    Wont go past 2500 rpm

    33 is MAP voltage high - yours is a MEFI 1 Means either the MAP is bad or signal lead is shorted to power 5V or grounded
  8. alldodge

    Wont go past 2500 rpm

    Tad low (might be the gauge) but looks good for idling
  9. alldodge

    1976 36' Chris Craft Commander Trim Tabs "Needed"?

    ok, I hope there is someone here which has one
  10. alldodge

    Doing a Full Removal 1986 Mercruiser 3.0L 140 hp Engine Question

    Without knowing your given boat and setup Merc list the carb 3.0 Dimensions (LxWxH) in 29 x 26 x 21
  11. alldodge

    1976 36' Chris Craft Commander Trim Tabs "Needed"?

    Welcome Trim tabs help level a boat, and if lowered further will push the bow down. With pushing bow down the stern can also move up, but not the same amount. Tabs in all cases increase drag, and the increase drag will reduce fuel economy.
  12. alldodge

    Wont go past 2500 rpm

    This should be zero psi, it's before the pump. You need to place gauge between fuel pump and throttle body Go to post 15 and click one the word "FUEL" it takes you to the TB and shows were it can be connected at Don't run motor above 1500 on a hose. The hose can not supply enough water to keep...
  13. alldodge

    Wont go past 2500 rpm

    Not for initial test, but with you being unable to go above 2500, will need to see if things change as RPM increases
  14. alldodge

    Wont go past 2500 rpm

    Thanks Need to measure FUEL pressure by connecting Tee adapter at item 1 or remove item 3 at attach gauge. Pressure should be 30 psi If you have a digital meter with tone or a 12V resistor LED can connect it to DLC connector. Turn key ON and do not start, then listen for tone or LED to flash...
  15. alldodge

    MerCruiser MCM 4.3LX back fires after a while

    Go by the cover with gap at .035 manual 18 list .040 but always go with the motor info
  16. alldodge

    Wont go past 2500 rpm

    What is the motor serial number?
  17. alldodge

    MerCruiser MCM 4.3LX back fires after a while

    Thanks I'm finding your motor has TB4 ignition so timing should be 8* BTDC with idle set 650 to 700 RPM Plugs AC-MR43T / Champion RV15YC4 / NGK BR6FS Gap .040 (1mm) Thermostat 140*F (62*C)
  18. alldodge

    MerCruiser MCM 4.3LX back fires after a while

    Welcome What is the motors serial number? The number can be found above the starter. Have you checked timing?
  19. alldodge

    Colocación de flaps caseros en embarcación 4 metros 80

    Welcome / bienvenido Translation: Hope someone can help
  20. alldodge

    LiFePO Batteries ???

    ll the info is very good, but how about a what if?? Bruce What if you were doing this, what would you do/use
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