I've got an old Toro CCR [3horse?] that was showing signs of carb problems last year so I rebuilt it last week.
The carb is a diaphragm type on a Tecumseh HSK600-1680s.[replacement carb is 640086A - the only numbers on this one are '744 9BS']
I knocked out the 2 welch plugs and soaked the carb overnight in carb cleaner.
Cleaned the plastic needle- it looked fine.
Cleaned gas tank [plastic] and replaced gasoline.
After the rebuild I started it up and it ran ok at factory- warmed it up, adjusted to what sounded real good. . . and waited for snow.
That was only a week ago, but today I couldn't keep it running. Primed it, and it started fine- but it acted like it wasn't pumping gas. As soon as the primed gas ran out, it died. Tried adjusting the carb back to factory- but it wouldn't stay running for more than about 30 seconds. I repeated it often enough to warm the thing up, but it still won't stay running.
I'll play with it more tomorrow- but I'm wondering if someone has run across this before.
Because it doesn't seem to be pumping, my first thought is that I put the diaphragm in wrong, but then why did it run so well last week?
Thanks, Jim