Mend > Lawn Mowers

Mend MTD 12A986Q785 Mower Engine Self-propelled

Honda 6.5HP Engine (MTD 21"SP Mower) Starts then Dies?

I have an MTD 21" Self Propelled Mower. I start it up (starts fine with one pull), it runs for about 5 to 10 seconds, then dies. It restarts easily, but dies. I've tried to hold the choke open, and it has no effect. Starts, runs, dies. I have the Operator's Manual for the mower itself, but not for the engine. I tried to download it from the MTD website, but the link will not work correctly. The model # is 12A986Q785, serial # is 1B285130451. Any help on this would be greatly appreciated.

Brad Gray
September 2005

MTD MTD 12A986Q785 Garden Tools, Lawn Mowers Mower Engine Selfpropelled

Your carb probably needs to be cleaned or replaced, I'd clean the gas tank too while your at it. Sounds like somethig is plugged in the main jet circuit and it's momentarily running off of the prime or "starting" circuit, which it's supposed to do until the engine runs enough to pull gas through the main circuit, however yours can't because it's plugged. These passages are pretty small so pay attention to detail if you decide to go in ! Good Luck Oh yeah check your bulk fuel supply for contamination too.

Peter Meenk
September 2005