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New Compression tester

Discussion in 'Chainsaws' started by Kenskip1, Oct 9, 2018.

  1. Kenskip1

    Kenskip1 Well-Known OPE Member

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    OK,So for the past three years I have been using my Lisle compression tester.I used it on my 041. Tested at 175 PSI.Wrong. So I have another tester and this won showed 90.PSI Wrong again.The saw had been run aggressively and burned out any oil in the cylinder, before anyone asks.What tester have others been using? I am going to try this again but on my Husky 51 and see what I get.Ken

    Did the compression test on my 51 Husky.Gage A=135 PSI.Tester 2. Lisle=170 PSI. Now both saws run great. I would like to think the high number is correct.However I have my doubts.
    I remember paying good monies for this Lisle a few years ago. Any suggestions besides the obvious? The O or rubber ring making the gasket has been replaced on both gages.No compression releases on either saws.
     
    Last edited: Oct 9, 2018
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  2. Homemade

    Homemade Pinnacle OPE Member

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    Not saying the adapter you may or may not be using plays a factor but this video shows how two gauges can vary in readings in same jug.


    Maybe try pressurizing both gauges with a known pressure from your air compressor to make sure they both read the same.
     
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  3. Kenskip1

    Kenskip1 Well-Known OPE Member

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    The fly in the buttermilk is that both have identical hose. I have watched the video several times. My hose going down to the cylinder is identical with both gages. 20181009_184640[1].jpg 20181009_184841[1].jpg
     
  4. Homemade

    Homemade Pinnacle OPE Member

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    Hey, I’m not providing the solution just the suggestion. Did you try pressurizing the gauges to see if they both read the same on the same input pressure.
     
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  5. Kenskip1

    Kenskip1 Well-Known OPE Member

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    Your not providing the solution? What the heck. Just kidding.I managed to hook up the gage to my air system. The gage with the black face is about 30 pounds light. I have as of yet managed to figure out a way to do the same to the Lisle.Brilliant Idea! I have a 22 HP riding mower with a twin cylinder. I'll connect a gage to each cylinder and see what I get.Then reverse gages.How's that for a solution? Really though it's had to believe that the 51 has all that compression.Suppose that I add both compression readings together then divide by two?Anyway, thanks for the reply. Ken
     
  6. Homemade

    Homemade Pinnacle OPE Member

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    You could try a rubber tipped blow gun. Just shove it in the end enough to creat a seal. If you have 30psi difference you know where that problem lies. If it’s only a few pounds, then it could be the set up.
     
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  7. Kenskip1

    Kenskip1 Well-Known OPE Member

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    Your suggestion worked very well.I have at the compressor 135 pounds.Here is what the gages read. The only problem that I have now is believing my saws have this much compression.
    20181010_102255[1].jpg 20181010_102359[1].jpg
     
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  8. Homemade

    Homemade Pinnacle OPE Member

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    Glad to help
     
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  9. 72thing

    72thing Chain dulling master

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    I've ran into this on my cheap Actron gauge from the parts store. It was reading low so I bought a nice Matco compression tester kit. The Matco came with a couple spare Schrader valves, so I replaced the valve in my cheap gauge and it read almost the same as the Matco. May be worth checking.
     
  10. Kenskip1

    Kenskip1 Well-Known OPE Member

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    News flash. The gauge that was reading low, still was.Until I hooked it directly to the air compressor line. Bango. Right up to 130 PSI. So the problem is not the gauge but the Schrader valve in the line. Hopefully Oreillys has one.
     
  11. 72thing

    72thing Chain dulling master

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    Those particular schrader valves seem harder to come by, as they have a lighter spring pressure than a normal tire valve. Let us know where you find one. I've read where some people get them from Snap-On, but I've never tried to buy one.
     
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  12. huskihl

    huskihl Sausage Fingers Forever

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    Napa is the only auto parts store I've heard of guys getting them at
     
  13. MarkEagleUSA

    MarkEagleUSA Pinnacle OPE Member

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    NAPA #700-9556
     
  14. Kenskip1

    Kenskip1 Well-Known OPE Member

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    Mark Eagle USA, Thank you for the information, I will pay them a surprised visit tomorrow morning.Ken
     
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  15. Kenskip1

    Kenskip1 Well-Known OPE Member

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    I visited my friendly NAPA dealer. The number is no longer in service and no additional information is available.
     
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  16. MarkEagleUSA

    MarkEagleUSA Pinnacle OPE Member

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    I found a Milton p/n 1251-2. Amazon has them but shipping is high.

    Maybe @Gentleman can stock these at HL Supply?
     
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  17. 72thing

    72thing Chain dulling master

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    It would be great to find an affordable source for these, as I have no more spares.
     
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  18. Kenskip1

    Kenskip1 Well-Known OPE Member

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    I may have found a temporary solution.On the top of gauge A there is a bleeder valve that releases the pressure. It is visible in the first image. It requires little pressure to release the pressure in the line.So I removed this pressure relief valve from gauge A and transplanted in into gauge B. So this one in gauge B went into gauge A.Simply put, I swapped the schrader valves from on gauge to the other.I have the order mixed up but the 041 are the first and last images and the Husky 51 are the second and third images. I still think these reading are high. 041_guage_a[1].jpg Husky_51_Guage_A[1].jpg Husky_51_Guage_B[1].jpg 041_Guage_B[1].jpg
     
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  19. John235

    John235 Active OPE Member

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    Bet that little 51 is a strong runner
     
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  20. Kenskip1

    Kenskip1 Well-Known OPE Member

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    Yes it is. I call it "Tazz" The 041 is called "Mongo"
     
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