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  1. M

    SPN 701 FMI 3 Check Engine Alarm

    V8-300-C isn’t a valid model designation. It’s missing a letter or 2 maybe post serial number? SPN 701 isn’t fault code that Volvo uses, maybe check again?
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    VP 5.7 Gi-J three or 4 sparks only

    You’re welcome, happy to help when I can. I’m not aware of ignition bypass on any Volvo EGC engine. Yours doesn’t have it. I have some concerns about using the Jaltest software. It hasn’t received Volvo Penta approval here in North America. I’m pretty sure your engine should be outputting...
  3. M

    Propeller not spinning No FWD or Reverse

    This is all you need to know. Something is wrong in the drive. Time to pull the drive and find out why.
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    VP 5.7 Gi-J three or 4 sparks only

    "Does anyone know if this ecm uses the GM ignition bypass circuitry during start phase?" Not sure what your referring to? Like the EST ignition on MEFI engines? I can't help with the screenshot of the scope, never used a scope on these engines. But the waveform diagram you show in 2nd post is...
  5. M

    Volvo Penta shop manual

    https://www.volvopenta.com/en-us/service-and-support/your-engine/manuals-and-handbooks/
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    2002 Volvo penta Gxi 5.0 beeping issue

    constant horn = s.l.o.w. mode, has rpm reduction above 2500 intermittant horn just means active code, no rpm reduction Code 44 is knock sensor not seeing enough activity. If this engine sees too much knock it will NOT set a code, just reduce spark and fuel. It's not a very smart system. You...
  7. M

    Wonder if I should go IO again or go OB?

    Very few I/O's are sold lately compared to O/B's but I'm guessing that when catalytic converters start being required on O/B's (and that day will come) we will see the pendulum swing back to I/O's. I’m guessing that’s why Merc and Volvo are still in the game. That 400hp O/B has a very expensive...
  8. M

    Wonder if I should go IO again or go OB?

    I’ll use Mercury Marine because they make both I/O’s and O/B’s. So based on what they charge for their different products I can form an opinion on long term cost. Pretty big difference when you buy one new. 250 hp I/O msrp $15-16,000 250 hp O/B msrp $25-28,000 Merc sells what they call...
  9. M

    Wonder if I should go IO again or go OB?

    my two cents from 30 some years as a tech. I like both, but what's right for you depends on how and where you will use the boat. Just remember that new O/B's are a gift that keeps giving. Mercury Marine sets the price on extended warranties. They feel that outboards will cost double in repairs...
  10. M

    AQ131 dwell setting

    62° +/- 3° is correct for your engine with the original distributor and coil. Dwell is the number of degrees the shaft turns while the points are closed - thus, the number goes up as the number of cylinders decreases. If you didn't have specs, the rough estimate was (360 degrees/number of...
  11. M

    Penta 5.7 256 SSX wont start

    The "E. U." you picture is the Active Corrosion Protection control unit. It doesn't have anything to do with your won't start. There will be a sticker or plate on your engine that will list the engine model, spec number and serial number. This information will be needed to give you accurate...
  12. M

    Volvo 4.3L GXI-F Cam/Crank not lining up

    Your engine does monitor oil pressure, but won't try to shut it down. After sensing oil pressure below 5psi for 30 seconds the engine will go into power derate 2 Your engine doesn't monitor block (water) pressure. There is a code that will show as "BP" DTC 0129 - BP Low Pressure SPN-000108...
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    Extended Warranty

    A little over 20 years ago I was a claims adjuster for the biggest seller of these in North America. I can’t speak to how it works on the other side of the pond, but here in the U.S. I recommend them to friends and family when they buy a new boat. The dealer gets 50% of the price, so they will...
  14. M

    DPS pressure and vac testing

    Have you pulled the drive to check for water in the bellows? Have you used the Volvo special tool to check for a bent prop shaft? Are your props out of balance?
  15. M

    DPS pressure and vac testing

    agree with this. single lip seal by the u-joints, just like mercruiser.
  16. M

    Annual Maintenance

    Read the owner’s manual. If you didn’t get one with the boat. Google “Volvo penta owners manual“ if you enter the engine serial number on the Volvo website they will give you a free downloadable copy. Now contact the boat dealer who did the maintenance and ask for copies. Compare what was done...
  17. M

    DPS pressure and vac testing

    Use motor oil at the possible leak points. It will either get sucked in or you will stop loosing vacuum. Have you pulled the drive to check for water in the bellows? The seal behind the u-joints will sometimes allow water in but still hold pressure. Also, when you’re pressure testing did you...
  18. M

    Newer Mercruiser Cooling System Questions . . .

    Yes, I believe that pretty much sums up coolant flow for the engine. The exhaust manifolds will have constant flow from the crossover to the manifolds to the heat exchanger And back to the crossover. I think there is only seals between the crossover and heads.
  19. M

    Newer Mercruiser Cooling System Questions . . .

    Yes, you are correct your engines do have the crossover and the parts breakdown you posted is the right one.. I was wrong. Note that when you pressure test this system, MerCruiser recommends testing with an almost full system at 20 psi. The service manual --- p/n 8M0099748 --- has a good...
  20. M

    Newer Mercruiser Cooling System Questions . . .

    The poppet valves serve a different purpose on outboards then on your engine. On outboards they release excess block pressure. On a catalyst engine they are one of the methods used to control catalyst temperature. Yes the crossover serves the the purpose that the intake manifold used to. But...
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