Small Engines (Lawn Mowers, etc.): 18Hp ohv intek Craftsman 42 lt2000, loose ground, lt2000

Question
Mower shuts down after 20-25 min of mowing.I have already changed coil and checked numerous connections but no luck only aggervation.Please help!Thanks,Kevin

Answer
How does it stop?  Will it turn over after it stops right away or do you have to wait?  When the engine stops can you turn it freely?

If it stops hard like the engine seizing you probably have an internal engine issue.  If it acts like you shut it off and will restart you have an electrical issue.

Look for a loose ground wire and recheck every connection.  You may have an intermitted seat switch or other safety switch.  Has it ever blown a fuse?  Could be a while heating hp because of too much resistance in a switch or connection.  

Electrical problems can be very hard to find.  If you want to check the system.  Start at the battery.  It should measure 12.6 volts.  Then take your vom meter and follow the path of the current.  There should be 12 volts on each side of all the switches in the run circuit.  If not that is the problem. In the start circuit you should have 12 volts on each side of each connection and switch from the battery to the solenoid through all safety switches back to the solenoid and then to the starter and to ground.

All this information is mute if it isn't an electrical problem.  Good luck.