Kohler CH25-68613 METALCRAFT (25 HP (18.61 kW) SN#3105017571 on a Scag Turf Tiger STT61A-25CH SN# 6711333 approx yr model 2001. Trying to get the engine to just fire off not expecting it to run more than a few seconds on starter fluid then maybe a little gas trickled into top of carb all fuel lines disconected cleaning out tank, any way engine should start and run, it did when i parked it approx 5 yrs ago. Im going to itemize so I dont get confused. 1. Unplugged eng to mower connector, to eliminate all saftey sw. 2. Removed breather to gain access to carb throat. 3. sprayed minimal amount starting fluid directly into carb shorted between terminals on starter with flat blade screwdriver (redneck way) got some life ran for couple seconds ok great. Little noise little debrie blowing around motor. 4. Re-peated step 3 more debrie and little pop ok 5. Re-peated step 3 and nothing. RE-peated Re-peated still nothing 6. ok do something else pulled a spark plug wire stuck screw driver in end and held close to metal bolt on engine once again rednecked the starter ah haa no spark. No spark no startey. 7. Read some posts on here decided to gain access to flywheel and ignition parts did so with help from parts manual from a previous post. Lo and behold. This is, Texas, looked like a mud-dobber apartment complex after a earthquake inside the blower housing, hence the noise and debrie field. Cleaned all that out. Also decided to purchase new plugs (probably no need but did $4.41) gapped at .030. Installed new ones just because so when i do get spark(positive attitude) it be good to go. 8. Decided to adjust MODULE, IGNITION (what the Book Calls it) i call it the coils 2-each should be gapped at .013 to flywhell magnet. (redneck tip no feeler gages i used a business card) Kids dont do this at home! I will go to town to buy feeler gages soon. Wiggled wires on terminals of coils all felt snug. 9. Now remember the kill wire (white) is disconnected as is the mower plug, as is all fuel supply. 10. Left cowling and fan off. 11. Put plug wires back on newly installed plugs. 12. Relying just on the engine ignition itself with starter fluid. 13. From what I have gathered from reading many posts from here, it should start and run in this configuration. 14. sprayed a little starter fluid and rednecked the starter and nothing, re-peated another time still no go. 15. Pulled 1 spark plug wire inserted screw driver rednecked starter got a spark put wire back on re-peated on other spark plug got spark. 16 Correct me if im wrong please, the MODULE, SPEED ADVANCE only comes into play when the engine is running True/False. 17. The REGULATOR/RECTIFIER has nothing to do with ignition True/False 18. So that brings me to the possibility that the mud-dobber condominium (rock hard mud houses)that was in the cowling when i first started the engine may have caused the shear pin between the crank and flywheel to shear throwing off the timeing. 19. I will patiently await the time for those of you, who so generously give of there knowledge and time to make this the best forum on the net. Thanks in advance to all.