cliffyk

13 hours is about where mine started doing the same thing. I had developed a similar  adjustment procedure using neutral as the reference. Tried this process last evening and it was very close to the setting my procedure came up with--been cold and rainy here today; haven't driven it yet...

The F/R shift mechanism is in the transmission, a  sliding dog collar on the counter shaft, in the crankcase. It is lubricated by engine oil and unrelated to the drive axles...

FWiW I can confirm that, model year for model year, the Coleman Outfitter 400/UT400 are identical to the Hisun HS400 in every way.