Hello, I have a problem with a Toro Timemaster Model #: 20199 with a briggs 190cc #121S020130F1 engine.This only happens after I engage the blades and on a cold mower.
The mower when it is cold runs horrible. I noticed that the auto choke linkage and arm on the carb flaps and flutters back and forth very fast and violently. This linkage goes to a thermostat on that muffler to the carb. If I hold the linkage in the choke OFF position the mower runs great and has good power but when i dont hold it the choke flap opens and closed at a very fast rate like its flapping in the wind.
Could this be a faulty thermostat, linkage, carb?https://streamable.com/nar4byhttps://streamable.com/6od3rb
It seems like when I engage the blades the one plastic piece rotates and thats when the choke starts to flap. the second video shows it a lot better.
I have tried a new choke return spring, and also cutting it to shorten it to apply more spring tension to help it hold the choke butterfly but nothing. Also, I have checked the govenor by removing the crank case cover and still all there.THis o