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2 cycle compression

Discussion in 'Mechanic and Repair' started by vipermanz, Sep 18, 2005.

  1. vipermanz

    vipermanz LawnSite Bronze Member
    Messages: 1,773

    just from boredom i did a compression test on my eb7000 and read it at 152psi i know that's good but is it really good??
  2. Brianslawn

    Brianslawn LawnSite Silver Member
    Messages: 2,004

    for a 2 cycle yes. most 4 cycle engines that ive seen are around there or a bit higher.

    i'll teach you how to rebuild engines if youll teach me how to weld better. lol
  3. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Messages: 3,526

    Over the years I have ran compression checks on my equipment at times and it takes a minimum of 60 pounds for a 2 stroke to run.
  4. vipermanz

    vipermanz LawnSite Bronze Member
    Messages: 1,773

    sounds fun!!
  5. Lawn Masters

    Lawn Masters LawnSite Senior Member
    Messages: 850

    Actually, 152 psi is EXCELLANT compression. some engines will not run with less than 90psi, and power is noticably less due to lower compression. I've seen bigger engines pushing around 300psi, and those are VERY high performance engines. the average machine with good compression will read anywhere from 130-160psi, which is good to perfect compression.

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