It would be a 28" Briggs OHv. Lots of posts on excessive valve lash causing the compression release not to function.

I'm guessing a carb problem. By cranking, you mean it never actually starts? It may be flooding. It wouldn't start flooded and spiting the extra gas out when you quit cranking it, could also be an indication of flooding. Now, I always hated the forum police, that tell you your posting in the wrong forum, but, if you added some details and posted this question in the "Lawn tractor and riding mower" section, more guys that work on riders would see it. Someone may have had the same problem you are and know how to fix it. Good Luck

"13.6V with the motor off" I don't get it. WHere is the extra volt sneaking in? Been adding liquid voltage to your fuel? Unless this is really cooking the battery? 15.6 probably isn't a deal breaker, but higher than desired for continuous charging. You could charge your battery and retest seeing if it is still high. I think Kohler likes you to buy a regulator if it is over 14.8? Verify also no AC heading into the battery and no draw. You should download the manual (it's free)ENter as guest. Here is a link that might be useful: kohler

it is a 12 32xl model number 71188 serial number is 7902436. it is jacked up. you can turn each axle and they spin free of each other. as in. when you spin one wheel the other wheel does nothing. nor does the pulley. you can do this in all gears. you can start the motor and let out clutch and the pulley just spins free. no wheel movement. i was wondering where that cable from the shifter went. the only place i can find is on the clutch. i wondered if it went somewhere on the rearend and was needed to engage the trans. the weird thing is. before i put the belt on and when the trans was in gear. the pulley would only turn about a 1/4 inch each way. but in nuetral it would spin free. i had to have it nuetral to spin the belt on cause it would not spin free when it was in gear. once i got on the unit after putting on the belt. i started it an let out clutch and nothing. so i look down and see the pulley is spinning and the unit is not moving. no matter what gear i select. sorry about the model number being wrong. don't know what i was thinking. and thanks alot for the help.