I thought that I knew something about compression test

Discussion in 'Mechanic and Repair' started by etap, Jan 11, 2013.

  1. etap

    etap LawnSite Member
    Posts: 13

    First, You have to make sure the gauage is good. I started off with 2 cylinder Kaswasaki engine,and check compression.The left side was reading 140psi and the right side was reading 175psi. The book said to set both INT. EXH. 0.004- 0.006 so I set the left side to 0.005 and check compression, and now it reading 90psi. so I check th setting on the other cylinder, and it was 0.13 Int .045 on the exhaust. So I set the left side to match and it is 180psi I am really confused. If I do it to the book it will 90psi .Is it that compression ACR doing it to me.THX
  2. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,264

    First, there is no left or right cyl. on a Kawasaki motor. Ya got #1 cyl., which is the starter side, and ya got yer #2 cyl., which is the oil filter side. look at the heads, do they say "left" and "right" ????? I didn't think so..........

    Personally, I set em to .004 cold, on TDC. Then rotate it thru a couple times and re-check. I always use a socket on the flywheel nut to turn the crank.

    Are you checking comp. with the choke & throttle full open? Sounds like youre doin' something wrong.
  3. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,245

    Not the ACR...probably a valve adjustment error...
  4. etap

    etap LawnSite Member
    Posts: 13

    It called for 004-006 so I set it at 005 ,1/4 turn after TDC and I got my compression the same,in both cylinders. This crazy but the exhaust even smells clean like a leaner burn,it didn't have that before,and it runs better now. I am glade that I check the valves on the 175 psi cylinder,because they where too loose. I really want to thank everyone who wrote to me, you helped me alot.
    Now I wonder if I put a snow blade on it, with chains on it if would push snow! THX Again

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