gas in the oil on Turf Tiger

Discussion in 'Lawn Mowing' started by Shady Brook, Aug 6, 2002.

  1. Shady Brook

    Shady Brook LawnSite Bronze Member
    from Indiana
    Messages: 1,517

    I thought I would post this where there was more visability.

    I have had substancial amounts of gas in my oil for several hundred hours now. The dealer thought it was coolant, changed head gaskets, but it did not help. My fear is that gas not being a very good lubricant, damage could have occured. The dealer acts like it is probably nothing, and I can not really tell any power loss, so who knows. The mechanics got rid of the oil, so I can not take a sample for wear metals.

    Does anyone have an educated opinion on whether or not I should be very concerned about this situation. It was not just a little gas, but a whole bunch. I would not be suprised if it were a 50/50 mix.

    Any thoughts are most welcome

  2. Jay

    I had gas get into the oil of a 36 belt drive scagg the dealer told me it was from not turning the fuel valve off and the machine bounceing around on the trailer from stop to stop.

    The walkbehind i thought sure had blown the engine you coundnt even pull the start rope .

    Well it turned out to be gas in the oil and the mechanic said it was a lot of gas in it.

    Jay did terpstra's do the work on your tiger?

    Hope it works all ok those darn repair bills can kill ya.

  3. Shady Brook

    Shady Brook LawnSite Bronze Member
    from Indiana
    Messages: 1,517


    Hey buddy, yeah it was Terpstra's that is doing the work. It was only this time that one of the Mechanics thought a more through test needed to be done. Could have saved many, many days without the mower. Oh well.

    It will be covered under warrentee, or the body count will be high! :angry: :D

    The carb is bad, we could see the carb bubleing fuel out on the inside. I just want to know if it is ok, or if I need to look to sell it soon.

  4. barnard

    barnard LawnSite Senior Member
    Messages: 618

    If it doesn't smoke or have excessive oil consumption don't worry about it. Why do you think you had gas in the oil for several hundred ours? you might have had some getting in for a while but it cooks off(evaporates quiklly in a running engine. It was standard practice in the old days of 6 volt batteries on tractors to thin the oil with gasoline so it crank over in extreme cold weather. the gas would then evaporate from the crankcase during operation. Also if youhad lots of gasoline in the oil your engine would have been running rich lie the choke was on due to gas vapors being drawn into the carb from the crankcase ventillation tube(hose).This didn't happen on the old tractors because crancase vapors were vented to the atmosphere instead of being drawn into the intake manifold and burned as the are now.
  5. strickdad

    strickdad LawnSite Senior Member
    Messages: 544

    ok here is the deal, the carb has a needle and seat stuck (trust me on this i used to be a mechanic) and it is alowing the fuel to flow in to the compression chamber and "puddle" on top of the piston (this is all happening when the engine is not running) the fuel will evently get by the rings and go into the crankcase,where it will blend with the oil . what will happen is the oil will thin out and lose its "viscosty" which inturn will accelerate wear. also gasoline is a oxidiser meaning it will have an aciditic effect on bearings etc. if the problem is not corrected in a timely manner it will lead to engine failure....
  6. ScotLawn

    ScotLawn LawnSite Senior Member
    Messages: 309

    If there is no engine damage then switch oils to either mobil 1 syn or opti syn and ALWAYS shut off the fuel when you load the mower on the trailer. synthetic oils will help protect the engine incase it happens again. shutting off the fuel after loading the mower on the trailer will PREVENT this from happening again. Just Ask 65Hoss. He will tell you what it almost cost him due to the same problem.
  7. lawnmowerman29

    lawnmowerman29 LawnSite Member
    from Iowa
    Messages: 34

    I just cannot believe your mechanic told you not to worry about the gas in the oil! If i were you i would find a mechanic who knew what he was talking about like a kohler master or briggs master tech. Gas in the oil can and will hurt your engine. It breaks down the oil and cause premature engine failure. I should know i turned wrenches on these mowers for 5 year before getting into the biz myself. The needle and seat on your carb is not sealing and allowing gas to leak by into the crankcase. Its a 10$ part and 1/2 hr labor job.
  8. Shady Brook

    Shady Brook LawnSite Bronze Member
    from Indiana
    Messages: 1,517

    Yeah, the dealer and mechanics are not inspireing much confidence in me currently. "Oh yeah, it should not hurt anything, go ahead and run it." It is sitting at the shop waiting for a carb kit that does not exisit according to the parts man, and a solenoid that shuts down the fuel, I believe.

    I am demoing a Hustler Z today from another shop. Great start to this demo is...No tire pressure in any of the tires. Blades were dull, with one chewwed to bits. A mulch kit was on it when I did not ask for one, and the blade that was cobbed up also touched on of the baffles when the blades were engauged. The machine has 4 hours on it, it has rusted pulleys, rust on the muffler, and one of the armrests is cracked from sitting in the sun..... Hum, I wonder if I buy from them I will get this kind of service?

    Thanks fellas, looks like Russian Roulette at this point.

  9. Shady Brook

    Shady Brook LawnSite Bronze Member
    from Indiana
    Messages: 1,517

    Still searching for answers.

    They rebuilt the carb, and put on a new shut off solenoid. No worky! Ok, so they put on a new carb.... No Worky. Kawsaki rep told the service guy it must be carb related. They told them they rebuilt it, and installed a new one, he continues to say that it must be the carb. They are going to try a fuel pump. Any other suggestions why my oil level keeps rising? Thanks for you help guys.

  10. 65hoss

    65hoss LawnSite Fanatic
    Messages: 6,360

    The oil level keeps rising, but are you shutting off the fuel when trailering or letting it sit overnight?

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