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Kohler 12.5hp runs but no power

Discussion in 'Mechanic and Repair' started by Hoffmm1, Jul 19, 2004.

  1. Hoffmm1

    Hoffmm1 LawnSite Member
    Posts: 5

    I have simplicity rider with a 12.5 hp Kohler that would quit on me. I pulled the fuel line off from the fuel pump output and didn't get much gas out. I bypassed the fuel pump and it ran fine. The tank is above the engine. Do I need to replace the $60 fuel pump or will that create any problem? I don't mow on any extended hills that the gravity system would not supply fuel to the carb. What kind of pressure or volume should that mechanical pump put out?
    Thanks for any input.
  2. Hoffmm1

    Hoffmm1 LawnSite Member
    Posts: 5

    I didn't finish the previous problem. After using the mower several times without the fuel pump, that didn't seem to matter, one day it wouldn't start. Lots of backfiring and poping. I replaced the keyway that was half sheared. Now it will start and run at idle. If I give it any throttle it wants to die. I did have the carb off and cleaned it and blew it out with air. Could I have put it together with a missing gasket or seal or something like that? The carb is a walbro with a non-adjustable float.
    Any ideas?

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