Jacobsen Tiller

Discussion in 'Mechanic and Repair' started by curdy, Jul 5, 2009.

  1. curdy

    curdy LawnSite Member
    Posts: 39

    Well, can't say for sure as we didn't hook a tester up to it :rolleyes:

    He basically stuck his thumb over the spark plug hole and moved the flywheel. There was a decent amount of pressure and it was noticeable when he let the pressure off. If this isn't enough to rule out compression issues, let me know, and I'll track a tester down. The friend I mentioned is a mechanic, so I'm sure he's got one stashed somewhere.

    Let me know and I'll get it right away, I need to pick up the pace on the repair to help my wife get the garden tilled. And as always, thanks for all the help!!!
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Hmmm,

    With ample compression it should have blew his thumb off the hole, Really need to see some numbers to rule out compression since it won't do anything on starting fluid. [​IMG]
     
  3. curdy

    curdy LawnSite Member
    Posts: 39

    Say no more, I'll get a number for you and report back [​IMG]
     
  4. curdy

    curdy LawnSite Member
    Posts: 39

    Still don't have the compression tester yet...I'm working on it (I've been out of town for quite a while also)

    I did have someone recommend looking at the flywheel key. So I did, and its in great shape.

    I know that still doesn't help with the compression reading request, buts I figured it was still worth mentioning.
     
  5. curdy

    curdy LawnSite Member
    Posts: 39

    Wow, how time flies. OK, compression seems to be around 62-63 psi.

    [​IMG]
     
  6. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    OK Don,

    I wished that gage had shown 70 or more..... what you have is borderline to running.

    For a few dollars a head gasket cost let's pull the head and take a look at the valves-seats and guides along with the cylinder bore.

    Since the machine had been sat up there could be surface rust on the valve face's and seats causing less than adequate sealing. With each valve up grab the head and see if they rock back and forth from carb to piston. With the piston about a quarter inch from the top press your thumbs on it and see how much it rocks from the carb to the front of the cylinder. Any sand scratches in the cylinder bore ?
     

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