Toro Snowthrower S-620 governor? The S-620 is one of those old single stagers next to the...
The S-620 is one of those old single stagers next to the straight blades and
the little rubber vanes for directional control and a 2-stroke-cycle
engine.
What kind of governor do these things own? Is it a little flyweight point
inside the engine or air vane or something else? The pretext I ask is
because I have one that starts and runs ok but wade into any snow and the
speed drops to the point of stalling and seem to be running on a fixed
throttle. I took the cover off and tried to see for any movement of the
throttle and there is none so that's features of confirmed but not the reason
why. It's get the spring tugging the throttle in the widen direction and
the little wire contact coming from points unknown. If it's an internal
engine part later it's not really worth fixing on such an old apparatus.
Answers: The governor sets the throttle based on the speed of the engine. Usually it is a vane within the area of the flywheel specifically deflected by the atmosphere coming off the flywheel which controls the position of the vane. The spring provides the prerequisite force to open the throttle. When the engine is loaded the flywheel slows down and the governor applies more throttle. It will be located lower than the flywheel cover and is external to the engine. Follow the wire contact.
I have an S-200 model --electric start--which is simply the same entry. I've found that you can't just push them, full-width, into the snow as it will bog down the domestic device like you say aloud...especially for heavy or gaping snow. Best method is to clear a section almost 2/3 to 3/4 the size of the machine's path to hold on to the rpm's up and not bog it. Maybe have the decline speed mixture screw adjusted for max rpm's. Great little element and very wishy-washy....much easier to use than one with a chute or my 8 HP two-stage that I reserve for blizzards. Get the model and serial number sour it if you want to check for parts and diagrams online....I've fixed mine a couple times and gotten parts from a local Toro dealer.