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  1. alldodge

    Mercuiser 357 mag low compression on #6 (120 psi)

    Ron White I'm out
  2. alldodge

    New 5.7 runs and shuts off

    Not likely and as before it wouldn't matter if Reg was set to limit at 30
  3. alldodge

    Mercuiser 357 mag low compression on #6 (120 psi)

    Compression ratio is compression ratio Math does not lie, incorrect calculations can If atmospheric pressure is used, turbo changed, supercharged the formula is correct. The DF300AP list 123 to 213 psi which leads me to think this covers more then just the 300, as with the older Verado V6 OB...
  4. alldodge

    Mercuiser 357 mag low compression on #6 (120 psi)

    More good grief and I don't have the time right now to get into all of it, but the Suzuki df300 shows compression is 10.5:1 The 350 is 12:1 So suggest you show what your talking about this time
  5. alldodge

    New 5.7 runs and shuts off

    No, but even if it was the Reg should limit pressure to what it's set at. There is a color ring usually where the vacuum hose connects. What color is it?
  6. alldodge

    New 5.7 runs and shuts off

    Yes
  7. alldodge

    New 5.7 runs and shuts off

    Merged
  8. alldodge

    New 5.7 runs and shuts off

    You should see 30 psi so something is making it high. The Reg being new, are you sure it's a 30 psi and not maybe 40? Either that or maybe the gauge is off If you have a air compressor and air Reg can bench test the fuel Reg
  9. alldodge

    New 5.7 runs and shuts off

    Your high, it's probably flooding. Remove the FP Reg on the cool fuel module (item 15) and check the screen under it. If it gets clogged it will increase pressure https://www.mercruiserparts.com/bam/subassembly/31886/4856/90
  10. alldodge

    Mercuiser 357 mag low compression on #6 (120 psi)

    Good grief, another show me and manual is not good enough. Below is a link on how to convert compression ratio to psi. Formula is X:Y*P= PSI X:Y = 9.4/1 = 9.4 P = Atmospheric = 14.696 9.4:1 Ratio 9.4*14.696 = 138.1424 14:1 Ratio 14*14.696 = 205.744...
  11. alldodge

    Rotary Helm

    Welcome You can replace just the helm "BUT" it has to use the same type cable
  12. alldodge

    2005 5.0 GXI Volvo penta crank but will not start

    The issue started around you post 12 that the MIL connection goes to J2-25 and I'm saying it goes to J1-27, that's it. I showed in all the manuals I have that it does go to J1-27. Why get ticked off, this is a discussion Searching THT I'm not able to find your thread Also when searching...
  13. alldodge

    New 5.7 runs and shuts off

    Either fuel pump or electrical When motor starts dying if its slow then I'm thinking fuel, if it's fast like the key turns off then electrical Motor is 10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
  14. alldodge

    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    What's you motor serial number?
  15. alldodge

    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    Welcome aboard First guess is the tank is drawing a vacuum due to tank vent may be clogged. When boat stops loosen the gas cap and listen for air to be sucked in. If you hear air then that's what's doing it
  16. alldodge

    2005 5.0 GXI Volvo penta crank but will not start

    Looked thru the 3 and 4 manuals and provide the following. The A series it's unsure what pin is used on the J connector because their not numbered and also its opposite orientation First pic is the A series Second pic is higher and all show Pin 9 of 10 pin and J1-27 Third pic is 4 and 4B from...
  17. alldodge

    2005 5.0 GXI Volvo penta crank but will not start

    And again no, it goes to both places on VP. On a Merc it only goes the 27
  18. alldodge

    2005 5.0 GXI Volvo penta crank but will not start

    ripjmk doesn't matter what was said previous, or what is hand written in the pic above, it's not correct. For MEFI-3 connector J1-27 is where the MIL is connected. All VP and Merc manuals show the same pin out. The MEFI 3 is a MEFI 3 is a MEFI 3. Even MEFI 4 and 4B show J1-27 as the MIL. My...
  19. alldodge

    Random no crank on 5.0

    The start, main power and fuel pump ate all the same. The trim may be different and have not compared
  20. alldodge

    Random no crank on 5.0

    Your slave relay is not the typical one found on most, is the same as the fuel pump and main power relays. There are 3 of them and look for the one with the yellow/red wire on it, it will be the slave https://www.mercruiserparts.com/bam/subassembly/31751/12840/40
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