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  1. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    You maybe pulling back on the lever, but from these "snapshots" The ECM seems to be adding air and fuel. If you look at manifold pressure, it's going up in chart 2 and has reached WOT in charts 3+4. Guessing the ECM is trying to add more air by opening the butterfly in the throttle body. If you...
  2. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    The video says the relief pressure is set by the manufacturer. Have you been getting these pumps from Volvo? I would think they would be the same pump used by GM, but some weird stuff can get changed during marinization. Agree that the chances of having 2 high pressure pumps fail exactly the...
  3. M

    Volvo Penta V6-240 Fuel High Pressure Dropping to Zero

    Don't think your in "limp mode" Here is Volvo's description of what your calling limp mode? Derate 1 limits maximum throttle opening to between 40%-45%. This will result in the engine speed dropping to somewhere near 3500 rpm. This speed will vary with the size and weight of the boat. When a...
  4. M

    WOT RPM Low. MAG350 MPI B3

    First I would check that the fuel pressure gauge is accurate. Might be relevant why the heads and injectors were replaced. In‑Water Test done in gear under load. 1. With a vacuum gauge and a fuel pressure gauge in place, operate the boat throughout the RPM range and record the pressure and...
  5. M

    B3X upper gearset lash

    Merc quit stamping numbers in the upper awhile back. Hope O.P. isn't in #28, that manual was like 600 pages in it's last version. Should be in #39, it's 6 books with about 1200 pages. Got to give a weekend warrior kudos to attempt this job, MerCruiser has made working on the new Bravo's soo...
  6. M

    B3X upper gearset lash

    Assuming you have all the tools and are following the service manual. That you have the exact same out of spec backlash on both gears is a bit of a red flag, guessing that it’s because of new gears and not wear. But when something unusual like this happens I would double and triple check my...
  7. M

    Volvo Penta 270 5L V8 power steering issue

    I think boats use a different pressure relief rating?
  8. M

    SX-D U joints and drive shaft non-repairable?

    Your gonna need some pretty big sockets for this job. I've only done this once without the Volvo tools, won't make that mistake again.
  9. M

    SX-D U joints and drive shaft non-repairable?

    I have done this job too many times. I don't think shop labor rate is why Volvo decided to only sell the complete assembly. Based on what I learned at Volvo drive school and doing the job. Volvo is very proud of how quiet their drives are compared to MCM. What they said they were finding in the...
  10. M

    Hot water heater

    It's been over a decade since I winterized a water heater. But it looks like the check valve is screwed into the hot outlet, should be in the cold inlet. Take a close look below where those hoses go into the heater. Should be a C and H stamped below them. If someone got things mixed up you can...
  11. M

    destroyed 2 gimbal bearing tools trying to dislodge a seized bearing. still stuck

    Might want to use your gimbal bearing install tool and make sure the bearing is straight. I'm guessing you either cocked it when you first started pulling or the last install wasn't straight. I was a "lazy" tech. If the bearing didn't come out with a few slide hammer pulls, I would drive it back...
  12. M

    Crack on drive unit - how concerned should I be?

    If you look closely right below the crack, there is a little 1/4" slot in the drive. That slot is there to drain the water out of the area where the crack is. My guess is that the drive hasn't been off in awhile or the last time it was, the person doing the service didn't know to check that area...
  13. M

    Bizarre IAC reading

    Are you sure 40 KNOTS? That boat would have had a speedometer that reads in MPH. Recordings might show an issue.
  14. M

    Bizarre IAC reading

    Diacom recording. Here is my recommendation on how to do the recording. Start with a cold engine and the boat in the water. 1. Connect Diacom 2. Turn on batt switch, turn on key switch -- but don't start engine 3. Start Diacom recording -- let run for 30 seconds to one minute 4. Start...
  15. M

    Bizarre IAC reading

    All the boat info is in my signature, Yes it is, looks like there is someone who should feel stupid --- me? --- sorry. At my age you would think I should know better. Or maybe that’s the problem? #3. yes, if it hasn’t been repropped. 25’ SSI w/6.2 should be about 50-55 MPH? Probably #1. Also...
  16. M

    Bizarre IAC reading

    You didn’t post a serial number or even a model number, but I see what looks like an ECM 555 in one of the pictures so I’ll take a guess. The MerCruiser PWM (pulse width modulatio) IAC is a great source of revenue for shops. I’m not sure why they cause so much trouble in marine applications...
  17. M

    Malfunction indicator Light constant on

    And I don’t want you to think I’m bad mouthing your Techmate. They are a great tool for certain situations. I will sometimes use one first for things like a MIL or check engine light. Boot time is very fast! And the screen is much easier to read in the sun. But people should know it’s...
  18. M

    Malfunction indicator Light constant on

    I would like to say Thank you for your service to our country. I’m sorry you have a lack of good dealers in your area. Volvo Penta does not have certified technicians. They grade their techs on levels. Higher levels will unlock more features of Vodia which Volvo Penta sells that a “good”...
  19. M

    5.0 GXi-F Injector Plugs on Wring Injector

    T/LBL Injector Driver cylinder #1 GR/BL Injector Driver cylinder #8 T/GN Injector Driver cylinder #7 GR/O Injector Driver cylinder #2 GR/Y Injector Driver cylinder #6 T/BN Injector Driver cylinder #5 GR/W Injector Driver cylinder #4 T/Y Injector Driver cylinder #3
  20. M

    No black/yellow kill wire on 9.9. 4-stroke

    Find the 4 pin connector on the electronic control unit. The brown wire is the kill. Should change to black/yellow before it goes to the stop switches. edit --- should have said disconnect it where it changes from brown to blk/yel
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