I have a 345 with 18hp Kawasaki. It will run fine for 20 minutes and die. If I let it sit for 10 to 15 minutes it will start up and run for 20 to 25 minutes and die again, but will fire on either anytime.
By J from IL
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MY PROBLEM WAS A LITTLE DIFFERENT* MY MOWER WOULD STOP DEAD AFTER ABOUT AN HOUR.I BLEW AIR THOUGH THE GAS LINE BACK TO THE TANK-ENGINE STARTED QUICKLY , BUT STALLED A WHILE LATTER . ***PROBLEM SOLVED **** I HAD OVERLOOKED A BLOCKED GAS __PUMP_(( AIR))_ FILTER ON THE OUTSIDE OF THE PUMP HOUSING (a small round filter about a half the size of a dime ). i brushed it very gently with a dry rag ,then wiped it again with just a dab of alcohol. PS. I REMEMBER SEEING THE CLEAR GAS FILTER BEING HALF FULL WHILE THE ENGINE WAS RUNNING, BUT OVERLOOKED IT, (WELL) ,(BECAUSE THE ENGINE WAS RUNNING OK ??? PS#2 AS SOON AS THE LITTLE GAS PUMP ((AIR)) FILTER WAS CLEANED, THE CLEAR GAS LINE FILTER WAS COMPLETELY FULL WHILE RUNNING ! HOPE THIS SAVES SOMEBODY SOME TIME. GOOD LUCK DENNIS in PA
I'll give it a try and see if thet will get it going again
Thanks for that one as that was my problem as well! Looks like a small brass breather element on the back side of what I think is a fuel pumps (black round thing about 2-3" in diameter).
You could have a dirty filter, dirty engine or a cracked head
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