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  1. M

    5.7 MPI Misfires Under Load

    Post the drive and transom serial numbers along with a pic of the ECM sticker. I can usually link an engine with that. Post the year make and model of the boat. I haven't seen any REC files posted. I personally don't know how to post them, I just know it can be done because others have done it...
  2. M

    2019 Volvo V8 380 C-M won't start unless i give it throttle

    Yes, finding a trained tech can be hard especially one that has the time to travel this time of the season. Might have to look at getting the boat to them. But I'm guessing you do need one. I don't know why this problem is showing up now. I have found most failures just happen. Ran good...
  3. M

    4.3 Mercruiser MPI Chugging/Surging and Beeping during turns/Waves

    I think you might be referring to a post I made on a Volvo Penta. Not all engines use this strategy. O.P. Didn’t post a serial number so at this point any advice would be a bad guess. I see someone has recommended a “wiggle“ test. I would never recommend this test on a running MPI engine. There...
  4. M

    2019 Volvo V8 380 C-M won't start unless i give it throttle

    Those numbers are normal, the fuel pressure at those pumps will fluctuate because the ECM uses PWM (pulse width modulation) to control them. Your engine is EFI high pressure direct injection. This means that you have a 3rd fuel pump under the intake manifold. This pump ups the pressure to...
  5. M

    2019 Volvo V8 380 C-M won't start unless i give it throttle

    Welcome to iBoats. what fuel pressures did you measure? What was the PSI?
  6. M

    Ignition service manual 1997 4.3GL

    Pink wire is a EST color. What ignition system do you have?
  7. M

    Ignition service manual 1997 4.3GL

    https://forums.iboats.com/threads/proper-manual-for-volvo-4-3gl-e.341349/ Don S. Man I miss that guy.
  8. M

    Ignition service manual 1997 4.3GL

    You didn't provide a serial number so I can't be sure. But I'm guessing you have the prestolite BID ignition system. The weak point we saw on these was module overheating. This system doesn't like people who leave the key on when the engine isn't running and warns the operator in the owners...
  9. M

    Volvo Penta 5.7 no spark

    This engine uses a Lever Based Throttle System. Basically what this means, If you set the throttle lever to half way (50%) this will command the ECM to try to maintain a certain RPM (lets say 2600 rpm as a guess for this engine) so the ECM will try to keep engine speed at 2600 rpm no matter what...
  10. M

    5.7 MPI Misfires Under Load

    Post the numbers from the injector balance test. Post the engine serial number. Post a pict of the ECM stickers. Post the Diacom files, snapshots of the screen doesn’t really show much.
  11. M

    2018 V6 200 J Oil pressure dropping and alarm

    Pretty sure your engine is 6 qt /5.7 L What do you see on the dipstick?
  12. M

    2018 V6 200 J Oil pressure dropping and alarm

    Yes, too much oil can cause low oil pressure as @Scott Danforth said. But this would be a constant problem, not intermittent. And usually only at higher RPMs. Alarm is triggered by the ECM, how that data makes it to the dash horn depends on the gauges. If I wanted to confirm oil pressure with...
  13. M

    2018 V6 200 J Oil pressure dropping and alarm

    https://www.harborfreight.com/engine-oil-pressure-test-kit-62621.html Looks like this might have the correct fitting that you will need.
  14. M

    2018 V6 200 J Oil pressure dropping and alarm

    Your engine has the oil pressure sender mounted on the front top of the engine, just a little starboard of centerline. This is NOT a 4.3L engine that some of the people giving you advice seem to think it is. This engine has variable valve timing and high pressure direct fuel injection. Oil is...
  15. M

    Replacing alternator belt

    No. Yes the engine moved. Yes the engine was moved back to within a few thousands. Nothing changed enough to justify the cost of an alignment check.
  16. M

    Replacing alternator belt

    tighten the bolts on the alternator and have a helper lift bottle jack under the harmonic balancer 2x4 as a lever under alternator couple of 2x4 across the gunnel, loop a rope thru the lifting eye and around the 2x4s, stick a long screw driver thru the rope and twist it it doesn't take much...
  17. M

    Replacing alternator belt

    Remove the 2 bolts, remove the spacer the belt is laying on, install new belt and reassemble.
  18. M

    3856761

    I had this tool at one of the shops I worked at, used it once. Waste of time. As you turn the eccentric piston you will notice it moves in and out as you shift from forward-neutral-reverse. When it's at the most in (half way between forward or reverse and neutral) that's were to do the shimming...
  19. M

    Volvo Penta 280 Drive Shaft Nut Clearance

    I'm not sure what you have going on, but here are a few things I've learned at Volvo school and doing this job many times. It's pretty rare the shims you install per the calculations are what you end up with after backlash and gear patterning. Backlash and patterning are not optional, they...
  20. M

    Volvo Penta 280 Drive Shaft Nut Clearance

    They gave you good advice on replacing that brass washer and the keepers. My guess on why you lost clearance, the brass washer was starting to bend. This allows too much clearance at the nut and will keep getting worse until the brass washer lets good and the shaft will come shooting out the top...
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