toro model 20357 hot starting problems

[steveprez]

This is a two year old 22" recycler that starts from cold very well, but after running after awhile, it will not restart easily, it requires 10 pulls or more before it fires. I've searched for the answer and it seems it may have to do with the auto-choke. What would be a good test to see if it is the choke? the serial number is 402597477.
thanks,

 

[mechanic mark]

Parts | Toro

www.toro.com

 

[Rivets]

Next time you try to hot start the engine check to see if the choke is fully open. AutoChoke may not be keeping the air horn open, causing flooding. This service manual may be of some help in diagnosing the problem. https://www.toro.com/getpub/167041

 

[steveprez]

Thanks, I looked at the service manual's trouble shooting section, it was very generalized and refers to the auto choke but nothing specific.

 

[Rivets]

Then we’ll have to wait until you can visually check the choke operation.

 

[steveprez]

Then we’ll have to wait until you can visually check the choke operation.

Started cold this morning, first pull start, ran for about 10 minutes shut off and it restarted on the first pull, after running for about 30 minutes, shut it down, let it set for awhile and tried to restart, took 8 pulls before it started. the choke was opened, that was varified by the position of the choke linkage. tried a restart 10 min later and the choke linkage appeared to be halfway between full and open. the engine started on the first pull.