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  1. #1
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
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    anybody good with older snowmobile engines?

    i have an old arcticat lynx 340 that won't run. my buddy was riding it and it was running great. he was putting in the barn and it popped through the carb and now it won't start.it had been sitting for three years so we went through the entire fuel system before even starting it the first time. it has great spark and gas to the plugs. one cylender is a little dry but should run. it won't even fire on starting fluid. any ideas? i am stumped. i have worked on these since i was a little kid and consider myself fairly good at it. but i don't know about this one. i am leaning toward timing.

  2. #2
    Join Date
    May 2012
    Location
    Upper Michigan
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    Fuel spark and air are all you need, is it flooding, did you try new plugs?

  3. #3
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
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    6,051
    Quote Originally Posted by Joehvac25 View Post
    Fuel spark and air are all you need, is it flooding, did you try new plugs?
    Also need compression. 2 stroke?

  4. #4
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    Feb 2008
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    Altmar, New York, United States
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    yup, used hotter plugs too.

  5. #5
    Join Date
    May 2012
    Location
    Upper Michigan
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    Hmm seems strange, what I do sometimes is heat the plugs up and also put a torch in the cylinder to burn the fuel out then try some carb cleaner or pour some gas in the cylinder then try.

  6. #6
    Join Date
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    Location
    Upper Michigan
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    Quote Originally Posted by SBKold View Post
    Also need compression. 2 stroke?
    I guess that's assumed since it ran before lol but I was going to mention yhat

  7. #7
    Join Date
    Feb 2008
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    Altmar, New York, United States
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    Quote Originally Posted by Joehvac25 View Post
    I guess that's assumed since it ran before lol but I was going to mention yhat
    it had 115 on both cylanders. it is oil injected. i put gas in them and starting fluid. no fire at all. doesn't make sence.

  8. #8
    Join Date
    Feb 2009
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    Tallahassee, FL
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    Check the reed valves if it backfired.

  9. #9
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    Altmar, New York, United States
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    Quote Originally Posted by SBKold View Post
    Check the reed valves if it backfired.
    would i still have good compression if they are bad? the motor was rebuilt 4 years ago.

  10. #10
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
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    Yes you could on the guage.

  11. #11
    Join Date
    May 2012
    Location
    Upper Michigan
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    Did you try to bump start it yet? Lol jk

  12. #12
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
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    Quote Originally Posted by Joehvac25 View Post
    Did you try to bump start it yet? Lol jk
    lol.

  13. #13
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
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    Seems odd that one cylinder won't even fire, try pulling the air filter off maybe, it's been awhile since I've done any wrenching.

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