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Using former two-stroke tank for four-stroke motor???

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  • Using former two-stroke tank for four-stroke motor???

    I just re-powered my boat with a newer four-stroke outboard. I would like to use my old gas tank, which held two-stroke mixed gas. Is there any way I can use the tank for the newer four-stroke? Do I need to wash it out some how? If so, how do I manage to do that?

    thanks,
    RW


  • #2
    Re: Using former two-stroke tank for four-stroke motor???

    If it is totally empty there should be no problem with filling it with fresh gas and running it. There would be very little oil residue left in the tank. Personally, I would do it even with a small amount of treated gas in it, but would not suggest you do it.

    Glenn
    sigpic

    08 Sun Tracker Regency, Party Barge 22
    08 Mercury 115 hp 4 stroke

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    • #3
      Re: Using former two-stroke tank for four-stroke motor???

      As long as the tank doesn't have other junk in it, the trace amount of oil left behind shouldn't harm anything.
      1976 Rogers Custom Boats 18' "Bonneville" W/ Chevy 454/ Berkeley 12JC

      Care Taker of 1976 Glastron V-184 Crestflight W/ Volvo 170B/280 I.O.
      & 1969 Starcraft W/ 1956 Evinrude 7.5hp Fleetwin.

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      • #4
        Re: Using former two-stroke tank for four-stroke motor???

        Even if you ran the 4 stroke on some 50-1 mix, it wouldn't hurt the motor at all. Might foul the spark plug after a while. Just empty the 2 stroke out and put in your new gas.
        Don S.

        sigpic

        Please, no PM's (Private Messages) regarding boat/engine problems.
        That is what the forums are for.
        Only forum/moderator issues will be answered in PM's.

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        • #5
          Re: Using former two-stroke tank for four-stroke motor???

          drain it and gas up
          Kevin

          But, where are the reevets?
          1981 Wellcraft V-20 CC Fisherman (FREE BOAT)
          1989 Wellcraft Monte Carlo 28(Build thread here)
          1992 Hotsports Jet'n'Cat Yam 701 WR3 drivetrain "SS George Washington"
          90's Yamaha WRIII and a pair of 95 Kawasaki ZXI-900's
          Fresh clean cheap oil is better then old dirty expensive oil any day
          sigpic

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          • #6
            Re: Using former two-stroke tank for four-stroke motor???

            If it 1/2 full of 50::1 mix or less, fill it with fresh gasoline and go boating.

            If more than 1/2 full, you could fill it and go boating, but is will smoke some.

            If tank is more than 1/2 full, and it is easy to drain some 50::1 mix out, I would do that. If it is not easy to drain, just fill it up and smoke some...

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            • #7
              Re: Using former two-stroke tank for four-stroke motor???

              Thanks everyone! That's good to hear... Now if I can just figure out what kind of wiring harness plug / connector is on this motor, I'll be set. Though it seems like that question is taking a while to answer, haha...

              RW

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