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Engines used in applications such as lawn mowers, go carts, chain saws, compressors, small pumps, generators, garden tractors, and string trimmers. Frequently hand (pull) started and without an electrical system beyond the spark plug. Technically there is an overlap with motorcycle / scooter engines, but for questions related to motor cycles or scooters those tags are preferred.

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Small engine air return to gas tank

Not sure about your generator, but my Champion 92001i has a lever in the gas cap. You are supposed to open the lever before starting the generator. After the generator is stopped, you are supposed to …
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4 votes

How many minutes to wait after turning off small air-cooled engine before oil change?

I changed the oil now. Because there were some contradictory advice (one advice: wait 10min, another advice: wait for long to cool to a safe 'warm' temperature) I decided ultimately on 20 minutes. It …
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1 vote

How do splash lubricated horizontal crankshaft engines lubricate the valve mechanism?

I think I have found the answer. The patent US4563986A describes a new way of lubricating valves of splash lubricated OHV engines. Every patent application must describe the state of the art while at …
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0 votes

Does a carburetor have constant fuel mass flow, constant liquid volume flow, or constant mol...

I looked at the mathematics of carburetors and discovered some interesting features. A simple carburetor has essentially these components, starting from air filter side (1) and ending to engine valve …
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1 vote

Engine for Briggs & Stratton mower not starting. Might be flooded

Overfilling the gas tank won't cause a mower to not start. Overfilling the gas tank however can lead to problems due to heat expansion so you should remove the excess fuel before leaving the mower in …
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