Search results

  1. JustJason

    2010 350 Mag MPI bravo 3 gaurdian mode issue. 5% power

    That's what PM's are for.
  2. JustJason

    2010 350 Mag MPI bravo 3 gaurdian mode issue. 5% power

    Addimittently I didn't look up the serial number to check the ECM version, I just looked at the model year of 2010 and grabbed the 555 manual. That said, I looked at the PCM 09 manual, I don't see a code 61 in there (Skips right over the number). Specifically what smartcraft gauge are you...
  3. JustJason

    2010 350 Mag MPI bravo 3 gaurdian mode issue. 5% power

    Service manual 36
  4. JustJason

    Carburetor question

    Were you still having this problem when you bought it? Or did the problem occur after you bought it/checked the compression?
  5. JustJason

    Carburetor question

    Black soot is often times a sign of low engine compression. So if you run out of ideas, check that compression.
  6. JustJason

    Need Ideas/Advice/Removal of Broken Upper Vertical Shaft Bearing.

    You "may" be able to get it off with an air hammer. But be real careful.
  7. JustJason

    2010 350 Mag MPI bravo 3 gaurdian mode issue. 5% power

    Maybe.... If the engine overheated and melted the FI wiring or melted an FI that would do it. Techmates a tough tool to work with as you can not read all of the live data at the same time. Plus if you have DTS techmate won't show you any of that stuff.
  8. JustJason

    2010 350 Mag MPI bravo 3 gaurdian mode issue. 5% power

    No. You may get a 2 beep alarm but you would not go into power reduction For the engine to go into power reduction limiting you to 5% power the engine is either overheating or has low oil pressure, or thinks that it is because of a sensor/wiring issue. Duplicate the problem and see what the oil...
  9. JustJason

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

    "OPs engine is a Mercruiser SBC 350 reman with anywhere from a 0.020 to 0.060 overbore sold as a "357" so it could be a 352 cube, 355 cube or 357 cube. Unless you look at the reman tag, neither you or I know the displacement.. you are arguing for the sake of arguing" You also have no idea what...
  10. JustJason

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

    You literally have no idea what you are talking about.
  11. JustJason

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

    So I have all the books. Service manual 17 is for 1993 through 1997 5.0 and 5.7 engines, which is not what OP has. Service manual 18 is for 1993-1997 V6 engines, which is also what OP doesn't have. To add to that, you wrote "to get to 200 psi cranking pressure, you need to have well over...
  12. JustJason

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

    Sure thing chicken wing In all fairness, the DF300 engine I was quoting is the older DF300 without the lean burn technology. The photos below come from that older engine service manual. However, I do have the manual for the DF350A engine, which does have the lean burn. That engine has a 12.1...
  13. JustJason

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

    Good grief.... That's not even remotely correct as it doesn't apply to engines.... For example, where does the formula take into account volumetric efficiency or valve timing? Here is an example. Honda BF200 engines. The compression ratio listed in the service manual is 9.4 to 1, same as the...
  14. JustJason

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

    So you are unable to show me the documentation you are getting your numbers from, got it.
  15. JustJason

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

    Can you show me the documentation you are getting your numbers from?
  16. JustJason

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

    Your compression is low. Your engine is 9.4 to 1 compression and you should see compression test results in the 170 to 200 PSI ballpark. I personally would not run the engine. If you have a leaking valve you can end up burning up that valve completely until the point the valve fails, and drops...
  17. JustJason

    5/8" barb fuel tank vent fitting?

    ABYC does not require 2 hose clamps on the vent hose. ABYC requires 2 hose clamps on fuel fill and engine exhaust systems only. 1 clamp is fine.
  18. JustJason

    Beginner Buying Used Question Re. Sea Trials

    Actually, I wasn't soliciting. I asked how much money he was talking for the boat so that I could give him some sound advice. But since you assumed I was soliciting, OP can get his sound advice someplace else. Sheesh.
  19. JustJason

    Beginner Buying Used Question Re. Sea Trials

    I'm a surveyor, send me a PM. Mod EDIT: Please use PM's for any solicitation of business as per forum rules.
  20. JustJason

    5.0 Gxi-ce 270-r misfires cyl 4&7 at full throttle

    Never swap ECM's. Make sure your mechanic understands live data on the scan tool and understands how fuel trims work. There could be sensor issues that are not throwing codes. You can definitely still have bad plugs. You can take a brand new spark plug and drop it on the ground just 1 time...
Top