New Compression tester

[Kenskip1]

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.

 

[Homemade]

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.

 

[Kenskip1]

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.

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.

 

[Homemade]

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.

 

[Kenskip1]

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

 

[Homemade]

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!

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.

 

[Kenskip1]

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.

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.

 

[Homemade]

Glad to help

 

[72thing]

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.

 

[Kenskip1]

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.

 

[72thing]

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.

 

[huskihl]

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

 

[MarkEagleUSA]

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

NAPA #700-9556

 

[Kenskip1]

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

 

[Kenskip1]

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

 

[MarkEagleUSA]

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

Maybe @Gentleman can stock these at HL Supply?

 

[72thing]

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

 

[Kenskip1]

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.

 

[John235]

Bet that little 51 is a strong runner

 

[Kenskip1]

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