Blew my piston I think..

Discussion in '2-Stroke Engines' started by Luybaton, Jul 10, 2016.

  1. Luybaton

    Luybaton Member

    My chain won't move unless I disengage the clutch so I know for damnd sure its not that tuff in compression left it at my friends house because it was far sondidnt get much time to examine but the craberator had white smoke coming out of it so did my muffler I put 2cycle (red) from gas station and boost performance gasoline treatment and 93 from the shell gas station mix rich as well any opinions of what I could be doing wrong witch I think its the boost performance stuff butt dnt know maybe I drive to far..
     

  2. crassius

    crassius Well-Known Member

    first, take out spark plug and see if it turns - if it doesn't try to find where turning stops because it may be bad bearing or something in sprocket or clutch - if it does turn, then fill it with regular gas and regular 2-stroke oil at 32:1 and see what happens
     
    Luybaton likes this.
  3. Steve Best

    Steve Best Active Member

    Crassius is telling you the straight goods.
    1) Plug out, does it turn? If not, pull the side covers and see if the magneto or clutch gear are damaged.
    2) if not, remove the intake (2 nuts) and exhaust (2 nuts) and then the 4 head nuts.
    3) Pull the head off and have a look. Any damage to the head or cylinder? Does it turn over?
    4) Pull the cylinder. The piston may be stuck in the cylinder. Use penetrating oil and ATF to get it free.
    5) If the piston slid easily out of the cylinder, check the crank bearings.
    Regular fuel, a good 2-stroke oil mixed at 32:1 and NO ADDITIVES will run these motors perfectly.
     
    Luybaton and Frankfort MB's like this.
  4. jaguar

    jaguar Well-Known Member

    how much oil did you add to the tank of gas?
    probably too little which lets the piston/rings have too much friction which then get too hot which melts the piston
     
    Luybaton likes this.
  5. Luybaton

    Luybaton Member

    I mix rich tho its weird
     
  6. Luybaton

    Luybaton Member

    Ok will get to it today
     
  7. Luybaton

    Luybaton Member

    I'll try this to thanks guys.
     
  8. Randall

    Randall Member


    "Regular fuel, a good 2-stroke oil mixed at 32:1 and NO ADDITIVES will run these motors perfectly." --- True, but I have found that running 92 octane (non ethanol) and the Octane Booster with MMT and, of course, oil mixed right gets a bit better throttle response. Just sayin'. : )
     
  9. Steve Best

    Steve Best Active Member

    I found 92 octane reduced my top speed by 5kph in my ported and modified head 66cc motor. Read the posts about it.
    Heavy oil gave fouling problems (read my posts of tests from 16:1 to 50:1). 32:1 of almost any synthetic seems to work well.
    Testing of all the octane boosters I could lay my hands on showed no perceptible gain. (no posts here, was with supercharged T-Bird motor)
    Read the label on some of those bottles:"Raise Octane 8 Points!" which would be 0.8

    Really test your stuff. Quantify it by measuring it. The butt dyno and the ear are often fooled by a hopeful heart.
    Use an accurate speedo and a hill to see if it really works. Measure it and know for sure.

    Steve
     
    Luybaton likes this.
  10. Randall

    Randall Member


    "I found 92 octane reduced my top speed by 5kph in my ported and modified head 66cc motor. Read the posts about it.
    Heavy oil gave fouling problems (read my posts of tests from 16:1 to 50:1). 32:1 of almost any synthetic seems to work well.
    Testing of all the octane boosters I could lay my hands on showed no perceptible gain. (no posts here, was with supercharged T-Bird motor)
    Read the label on some of those bottles:"Raise Octane 8 Points!" which would be 0.8" --- Huh, interesting. So many variables in these engines. Yeah, I only run synthetic in mine. Runs really good. Still a newbie, but learning every day. Will read what you recommended. Thanks Steve : )
     
  11. bcredneck

    bcredneck New Member

    the acitone in the cheap octane boost breaks down synthetic 2 stroke oil even just feel oil between you fingers and add some "boost" it should instantly not feel slippery
     
    Luybaton likes this.
  12. Luybaton

    Luybaton Member

    Thanks bro I figured it out finally lol
     
Loading...