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compression specs 102psi?

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  • compression specs 102psi?

    The compression specs listed in the inside of my cowling is listed at 7.2 kg/cm. This only comes to 102psi. I'm just a little confused cause that seems extremely low compared to other motors.
    If anyone can explain this to me I would apreciate it cause to my understanding 100psi is just pinching it.
    2002 25hp 2 stroke tiller manual start, 2 cylinder

  • #2
    That is normal for a Yamaha 2 stroke engine.
    Regards
    Boats.net
    Yamaha Outboard Parts

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    • #3
      So that would mean that 90 or even 80 psi would be reasonable compression for this motor?

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      • #4
        Compression neads to even, no more than 10% difference between cylinders. 80 would be low but will run on 90.
        Regards
        Boats.net
        Yamaha Outboard Parts

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        • #5
          so would the compression spec of 102 psi be suggesting that this be the minimum compression?

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