scag turf tiger with a Kohler command 22ch Help Please

Discussion in 'Mechanic and Repair' started by scag43, Jun 20, 2012.

  1. scag43

    scag43 LawnSite Member
    from Florida
    Posts: 38

    Hi there, this mower had a Kohler command 22hp STT22 (blew that engine), my mechanic install Kohler command 25 hp stt25, both engine has the same amp (15amp) and they look identical except for the oil cooling device on the 25hp and the stickers, the mower is a beast now very happy, but when I engage the pto, it takes about 5 to 10 seconds to engage and amp meter drops, with the 22hp the pto engage right away and amps will go to 15. any idea as what could be wrong, my mechanic said pto is going bad, but I never had that problem before, could this be relate to a wrong voltage to activate the pto...I will really appreciate any help...
     
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Loose connection...check for bad fuse holders....
    Ensure that the clutch pigtail is properly plugged in..

    Other than the pistons..heads..and carb...you basically have the same engine..
    If it worked before...it should work now...
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  3. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,533

    Look for a pinched or nicked wire. Common occurence when your trying drop in an engine and keep everything clear. Wires get pulled loose when seperating weatherpak connections. Doubtful the PTO is failing like that.
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  4. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    I agree Patriot...
    If the clutch pulls more than 5 amps on startup...it'll blow the fuse...if not it will definitely melt the wiring...
    As a rule of thumb..if the clutch pulls more than 2 amps when running...its on its way out...windings are melted...
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  5. scag43

    scag43 LawnSite Member
    from Florida
    Posts: 38

    This morning the Battery was completely dead and the starter was only clicking when I turn the ignition switch,( that never happen before ) , I had to go back home and charge the battery, I also found a lose wire, it is color blue and it goes on the starter solenoid..I did charge the battery, fix the wire and mower start right away, when I got home on the afternoon I check battery voltage and it was at 12v. The amp meter still drops to 5 when I engage the blades ( it was used like that all day yesterday and today ) ...fuse holders are brand new, you guys help on my previous post on how to replace them and what type of wire….thank you

    How can I test the Battery charging system on this motor to see if is working properly?

    Also the amp meter gauge it is not the original for this motor, maybe that is why is dropping to 5 amps...I don't know just guessing...
    Thank you
     
  6. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Attach a volt meter to the battery...
    Check the voltage....crank the engine...
    With the engine running...check to see if the voltage increases or drops...
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  7. scag43

    scag43 LawnSite Member
    from Florida
    Posts: 38

    I just check battery voltage, engine off, battery 12.9v, engine running full throttle 12.7v. , looks like is not charging, where do I go from here? Thanks...
     
  8. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    There is a flat connector with 3 wires in it that plugs into the regulator..
    It should be on the cowl...oil filter side...
    Make sure it is plugged in ....and that there is a ground wire installed between the regulator and a good ground....usually a cowl bolt...
    Posted via Mobile Device
     
  9. scag43

    scag43 LawnSite Member
    from Florida
    Posts: 38

    It is night time here in Florida, will check tomorrow, if it check ok, what else should i check, I don't know how check the middle wire on the regulator, I know how to check the 2 wires from stator, is there anything else I should check if everything test ok, thanks
     
  10. scag43

    scag43 LawnSite Member
    from Florida
    Posts: 38

    Found the problem, like always Thank you guys... it was the flat connector with 3 wires in it that plugs into the regulator, the plug was connected but it was the wrong way, one of the corner wires wore out, now it will go 10+ on amp meter, battery voltage is 14.3 running and 13.2v not running and the blades will engage right way …..Thank you very much...
     

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