ExMark Navigator Kohler 20 Bogs down on PTO after 20 min

Clund1

LawnSite Member
Location
NH
ExMark Navigator Kohler Command 20 from 2007 and 900 hours.

Fully Serviced with filter, plugs, oil change this spring. Now each time it runs for 20 min or longer with the PTO engaged, the governor intermittently cuts out and blade speed drops in half. Gets worst with time but fixes itself after sitting for an hour or two.

Thoughts?
 

ed2hess

LawnSite Fanatic
ExMark Navigator Kohler Command 20 from 2007 and 900 hours.

Fully Serviced with filter, plugs, oil change this spring. Now each time it runs for 20 min or longer with the PTO engaged, the governor intermittently cuts out and blade speed drops in half. Gets worst with time but fixes itself after sitting for an hour or two.

Thoughts?
When it fails pull plug wire off one at a time. May be bad coil.
 
OP
C

Clund1

LawnSite Member
Location
NH
When it fails pull plug wire off one at a time. May be bad coil.
Thanks - the second I drop the PTO it revs right back to normal. Seems to only happen under PTO like its governor related, but I can’t figure it out.
 

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