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EFI fogging concoction recipe?

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  • EFI fogging concoction recipe?

    I know I've read the formula for taking a small can of gas along with two stroke oil and whatnot to run through engine before winterizing, but I can't seem to find it by searching and its not in the stickies, they only reference the carb process and I have EFI. Can someone please enlighten me on the process?

  • #2
    Get input from Mischief Managed or tpenfield
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 Seadoo GTX
    Merc Adults Only VP Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

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    • #3
      1 gallon of gasoline add 12-13 ounces of of 2-cycle oil, plus appropriate amount of stabilizer, all in an auxiliary tank.

      Connect tank to engine fuel line. Run engine for 10-15 minutes so that the winterizing fuel gets through the fuel system and into the engine.
      Best regards, Ted . . . . Cape Cod, MA

      Current Boats: Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
      Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

      My Boating Web Pages: http://www.tpenfield.com

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      • #4
        Exactly what I needed...thank you tpenfield !!!

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        • #5
          Just add your two cycle oil into the fuel filter/separator and run the engine for about 15 minutes. This period will warm the oil up so that you can then pump it out.
          Summer Fling-II
          2008 Chaparral Sunesta 264
          Summer Fling
          2003 Chaparral Sunesta 243

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          • #6
            Originally posted by BRICH1260 View Post
            Just add your two cycle oil into the fuel filter/separator and run the engine for about 15 minutes. This period will warm the oil up so that you can then pump it out.
            That's what I used to do, until I found a nifty port with a threaded plug just downstream of my throttle body. I usscrew the plug and use it to add fogging oil.

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            • #7
              I just run the tank as low as I dare. Fire 5l of fuel in at about a 20/1 mix and run it.

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              • #8
                Just my opinion.... injectors are not designed to squirt oil.. I don't fog mpi injected systems, but I do add Sea Foam the the gas and run it awhile. I'm sure people have been doing the mix for years with no problems, But I respectfully disagree.

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                • #9
                  Five answers that are different from Volvo's recommendations.

                  People wonder why their engine has problems?

                  kdiddle doesn't say what engine they have but this is Volvo's latest from the owners manual.

                  Fuel Storage Mixture
                  This procedure requires a moderate level of
                  mechanical skill and knowledge. If you do not feel
                  comfortable performing this procedure, see your Volvo
                  Penta dealer for assistance. Ask the dealer to perform
                  this Fuel Storage Mixture procedure as part of
                  preparing the engine for storage.
                  Using a portable, outboard engine fuel tank, add:
                  • Fresh fuel (enough to run engine 15 minutes)
                  • Two-cycle motor oil (50:1 ratio, gas to oil)
                  • Volvo Penta Ethanol Fuel Treatment, per label
                  instructions
                  DANGER!
                  Fuel and vapors will be present during procedure,
                  which can result in an explosion; provide ventilation
                  and eliminate all sources of spark or flame.
                  WARNING!
                  Engine must be run to complete process. Take
                  precautions to ensure safety and prevent engine
                  damage:
                  • Boat must be properly supported.
                  • Run the engine using the engine flush fitting. The
                  engine must have adequate cooling water; always
                  monitor engine temperature gauge and alarms
                  when running engine with boat out of water.
                  1. Not available in all markets. Use a comparable marine fuel
                  stabilizer if the Ethanol Fuel Treatment is not available.
                  • Run engine with drive out of gear and in full trim
                  down position.
                  • Do not run fuel pumps dry.
                  1 Disconnect the fuel line at the inlet fitting of the
                  engine's fuel pump. Connect a line from the
                  portable tank (with storage mixture) to the fuel
                  pump inlet.
                  2 Run the engine on the storage mixture for five
                  minutes at 1500 RPM. This will ensure that all fuel
                  system and internal engine components are
                  protected.
                  3 Reduce the engine speed to idle and stop the
                  engine.
                  4 Reconnect the boat fuel line to the fuel inlet fitting
                  and check for fuel leaks. Do not start engine.
                  DANGER!
                  Failure to inspect your work may allow fuel leakage to
                  go undetected. This could become a fire or explosion
                  hazard.
                  Good Luck Muc

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                  • #10
                    The Mercruiser service bulletin has the mix at a 10:1 ratio, unless they have recently changed it . . .

                    The part of either procedure that I find the most difficult is disconnecting the fuel line. I find that it also helps to prime the line from the auxiliary tank.
                    Best regards, Ted . . . . Cape Cod, MA

                    Current Boats: Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                    Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                    Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                    My Boating Web Pages: http://www.tpenfield.com

                    Comment


                    • #11
                      Originally posted by tpenfield View Post
                      The Mercruiser service bulletin has the mix at a 10:1 ratio, unless they have recently changed it . . .

                      The part of either procedure that I find the most difficult is disconnecting the fuel line. I find that it also helps to prime the line from the auxiliary tank.
                      Yes MerCruiser still recommends the 10:1 ratio.
                      But I thought this was a Volvo?
                      Maybe the O.P. Has a throttle body with VST fuel system? Maybe that would have a different preferred procedure?

                      i guess the point I’m trying to make is that a lot of people seem to think that all EFI engines are the same and that what’s best fior a MerCruiser will be right for a Volvo. Many times that can lead to big problems. All the ways recommended in the above posts can work OK on some engine (except dumping oil in the filter —- that’s just a bad idea on any engine) but there will be one method that works best for your engine.

                      Remember, when we fog an EFI engine it’s not just about protecting the pistons and cylinder walls. It’s also about protecting the fuel system. Pumps, injectors and fuel pipes need love to!
                      Good Luck Muc

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                      • #12
                        Originally posted by Mischief Managed View Post

                        That's what I used to do, until I found a nifty port with a threaded plug just downstream of my throttle body. I usscrew the plug and use it to add fogging oil.
                        What "nifty port" are you referring to?

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                        • #13
                          Originally posted by dearmosd View Post

                          What "nifty port" are you referring to?
                          There's a threaded plug in a threaded hole that's about 1/2" diameter on the top of the intake manifold, just downstream of the throttle body. The plug has a 1/4" Allen head and comes out easily. I take it out with the engine running, use my finger to throttle the air going in to keep the engine speed around 900 to 1200 RPM and spray fogging oil into the port.

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                          • #14
                            Owner Winterization is one of the biggest money makers for Dealerships. Good profit on all the stuff the do-it-yourselfers buy, then next spring/summer a long line of mocha in the oil pan repairs, gummed up carbs, or injector systems.

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                            • #15
                              Sign up today
                              Surely the vp GLI is a merc EFI and a VP gxi is a merc MPI. Meaning the fogging for one, would suit the other.
                              The merc manual was changed recently to advise the heavy 2 stroke mix at about 10/1 and NOT to fog as per the usual way.

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