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1990 20hp Sunstar Rear PTO cuts out during rototilling operations, if I turn off switch and turn back on it will work for a little bit but then cuts out again. I recently replaced my engine with a 24hp Honda from Small Engine Problem started after the engine change. Is this a PTO problem or some kind of wiring issue with the new engine??? Thanks

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  • kukrupski Apr 17, 2009

    This tractor has two PTO's, one runs off engine, and second (rear) runs off Hydrostatic drive. This wasn't tuched during engine replacement. This is the problem clutch. When engine is cold rear PTO will run for a while, but once engine has warmed up the problem begins.???

  • Anonymous Apr 27, 2009

    1990 Simplicity Sun Star, replaced 20hp Kohler Magnum with new 24hp Honda from Small Engine Warehouse and it was supposed to be bolt and go but now both my Front and Rear PTO's work intermittently mostly not at all. Now I can't even cut my grass!!!! The clearance between plates are good on both PTO's I think it's got to do with electrical, but don't know where to start looking.

    Thanks for any help


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Did you install the original electric clutch from the old engine?

If so, you may not have the adjustment right. On most electric clutches, there is a specific distance between the drive plate and the driven plate. Check your shop manual (if you have one) for this, as it does vary between manufacturers, and depending on the size of clutch.

Posted on Apr 17, 2009

  • charles raynor Apr 17, 2009

    Ok, Same thing applies to that clutch. As the clutch engages, it slips a little, wearing the plates. You should be able to adjust the driven plat in a bit closer. I would bet that the added HP from the new engine is the reason that the problem showed up now. Chances are high that it has been out of adjustment for a while.

    The added HP would cause some minor slippage, heating the clutch plates to the point of loosing grip, then when they cool a bit, they work until hot again. If adjustment doesn't work, you will probably need to replace it.


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