Compression on gx160 honda engine

Discussion in 'Mechanic and Repair' started by stallone, Oct 9, 2006.

  1. stallone

    stallone LawnSite Member
    Posts: 3

    Hi all,

    I am a new member on your forum and appreciate all the help your site can give to me.

    I have just buy an honda snowthrower hs624 with gx160 6hp engine on it. I have check the compression of my engine at hot and it give 118 psi to me.

    1) Is it good?

    2) My snowthrower is about 8 years old, is it necessary to do and valve clearance if i doubt that doesnt be done? If yes, can you give to me the procedure and number of the clearance please!!

    Thanks a lot,
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    First off [​IMG] to LawnSite.

    118 lbs compression is more than adequate to run this engine with no problems.
    Unless they are a little noisy I wouldn't bother, But if they are adjust them with the engine cold.

    .004" intake and .006" exhaust at top dead center compression stroke.
     
  3. stallone

    stallone LawnSite Member
    Posts: 3


    Thanks for the reply!!

    And what is the normal range of compression (upper and lower limits).

    Bye:waving:
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    120 lbs maybe a little higher on this high side. When it gets down to 60-65 it's harder to start and 50 or below is no start.
     
  5. stallone

    stallone LawnSite Member
    Posts: 3

    I dont know what you mean about "120 lbs maybe a little higher on the high side"? Is it normal 118 psi at hot?

    thnaks
     
  6. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    I read restrorobs post to mean that 118 out of 120 is about as good as you can get - and it is.
     

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