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  1. #1
    diamondwatercraft's Avatar
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    01 Challenger pre mix

    I have been reading here about premix on the 240 hp merc. This thing is a EFI is that OK to do? Wont it clog the fuel injectors?


  2. #2
    diamondwatercraft's Avatar
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    The manual says to mix the fuel 32:1 prior to winterizing. I guess it must be ok to run premix?

  3. #3
    wkuadam07's Avatar
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    Pre-mix oil is actually good for the injectors, the question is where the injectors are placed in the motors. I am not familiar with these mercs, but if it is "throttle body" type fuel injection it will run just fine. If it's like the seadoo DI, or RFI motors and the injectors are in the side of the cylinders then the oil will never reach the bottom end of the motor and a seizure will occur fairly quickly. On the RFI and DI models the oil injection squirts into the throttle body... really only mixing with the air. Fuel is only found in the cylinders and the exhaust in a properly running engine.

    If it will oil the entire engine, then premix should be fine. All injectors work on the same basic principles, with different shapes, sizes, operating pressures, etc... even diesel injectors, the diesel truck guys are running tc-w3 oil mixed in their fuel to PREVENT injector failure, because the low sulfur fuel doesn't have enough lubricity to keep them moving and sealing properly.

  4. #4
    diamondwatercraft's Avatar
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    I believe that the merc is a throttle body. I will check. I can tell you the DI models inject to the cylinder. I do not think that you want any oil in those. The DI uses so little fuel I think you would fry it before the injectors clogged but the result would be bad either way. Thanks for the reply.

  5. #5
    diamondwatercraft's Avatar
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    What mixture should I run? 50:1? It is real smokey on idle but starts instantly. It loads up during those times I idle for a while. Is there a specific kind of oil that anyone would recommend to stop this? I am running quicksilver 2 stroke.
    Last edited by diamondwatercraft; 06-01-2014 at 05:56 AM.

  6. #6
    diamondwatercraft's Avatar
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    Not much action on this thread. BUMP

  7. #7
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    Legend oil burns well. Wont foul plugs. I have been running this stuff for a few years. Judging by your location, it should be easy for you to get too.

  8. #8
    diamondwatercraft's Avatar
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    Are you pre mix too? Have you tried amsoil?

  9. #9
    diamondwatercraft's Avatar
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    Trying the amsoil this weekend. Saber Supposed to be low smoke. We will see. Also was reading about others online running 60:1. That will help for sure. Anyone else run 60:1?

  10. #10
    diamondwatercraft's Avatar
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    Saber helped the smoke a bit. Not as much as I would like. Going to buy some legend oil and see how that goes.

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