2000 Posts and climbing!!!
Join Date: Dec 2005
Re: Kohler 20 HP Twin, sudden stop, will not start
Nice there seems to be a consensus that I have a fuel problem, not a valve spring, head gasket,..... problem. Again:
Spraying carb cleaner into the carb (and all the exterior levers and springs) resulted in an immediate and easy start, only a few turns of the engine and it fires up, and quits when the spray is gone, maybe 2 seconds. Also, again, I have checked that fuel is being pumped into the carb by removing the line at the carb and pumping gas into a container by cranking the engine. I also removed the solenoid (anti-backfire) and checked that it operated and released first by connecting to battery, then by turning the ignition on/off. Of course this was done while the solenoid was operating in the resistance of the open air. Also, the solenoid is on the bottom of a single float tank which was drained by me first removing the solenoid and the cutoff chamber (name?) and off and the whole chamber/bowel came loose and any fuel or water therein ran out. Sorry I don't recall if there was much or any fuel running out but I think there was. In any case this allowed me to look and see the that the solenoid cutoff hole was open and clear. Thus, my plan to pull just the solenoid and removed the valve/plunger and putting it back on. This would in effect defeat the solenoid and clear it of any charges it is not operating correctly. If the problem continues my conclusion is the carb has internal problems and simply replacing the carb would fix the problem. Two unknowns: 1) is the fuel pump okay pumping an estimated pint per minute, at an unknown low pressure. 2) the float chamber just goes back on, there isn't a wrong way, I could not feel any detents or other position sensitive behavior when I put the chamber back on (is on bottom of carb and a feel for the right fit position) and screwing the solenoid back in to hold it altogether. The chamber is not a simple bowel, it has an offset shape.
1989 Craftsman LT 12 HP 38" 2-blade deck - Retired
1993 Craftsman GT6000 18 HP B&S twin L-head 44" 3-blade deck, - Avatar and duty GT
2005 Craftsman DYT4000 42" 2-blade deck - B&S 18.5 Intek - new head gasket twice in 500 hr. Was hit by a Pine tree blown down by Hurricane Sandy Oct.2012
. But I now have the PYT9000 and a real mowing machine
2011 Craftsman PYT9000 B&S 26 HP Professional and 46" 2-blade deck. Wife said "ANOTHER TRACTOR?"
I replied "Yep"