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  1. JustJason

    Fiberglass cracking - BRAND NEW R4 Surf 2023

    If you can physically hear/feel flexing underfoot there is a latent defect in the hull and it wasn't laid up thick enough in the mold. It may or may not be able to be repairable. Taking it to the dealer is always the first step, they may or may not be able to fix it. Depending on the feedback...
  2. JustJason

    Carburetor question

    It's likely from bacterial growth. You can always give bleach a shot but if that doesn't work there is a product made specifically for bacterial pinking. It's called, wait for it, Pink Away.
  3. JustJason

    Doral 360 - Water Trapped in Hull

    No, no drain holes. If there were drain holes any potential CO leak from the engine compartment could find there way into the accomodation spaces.
  4. JustJason

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

    That's what PM's are for.
  5. 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...
  6. JustJason

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

    Service manual 36
  7. 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?
  8. JustJason

    Carburetor question

    Black soot is often times a sign of low engine compression. So if you run out of ideas, check that compression.
  9. 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.
  10. 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.
  11. 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...
  12. 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...
  13. JustJason

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

    You literally have no idea what you are talking about.
  14. 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...
  15. 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...
  16. 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...
  17. 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.
  18. JustJason

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

    Can you show me the documentation you are getting your numbers from?
  19. 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...
  20. 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.
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