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Q. I am trying to build a beefed up go kart and I have a lawn mower engine that I can use but lawn mower engines are vertical driven and a go kart is usually driven with a horizontal mount. How do I make the conversion, should I just use a gear box? Also how do the governors work, my budy build one with an old 5hp briggs and stratton and he tore the governor off why did he do this? any ideas?...thanx guys.
Answer
You can buy a gear box to run a vertical shaft engine, but it is probably cheaper to buy a horizontal shaft engine than to try to convert it.
The governor is in place on a lawn mower for 2 reasons -
(1) when you're using the lawn mower, its not practical to keep a hand on the throttle, but the mower needs to operate at different throttle openings to work efficiently. The governor senses load on the engine and reduces or increases throttle opening as needed.
(2) if you were to just run it wide open, you would overheat the engine and reduce the life of it. Also, the maximum speed has to be governed because the blade is only safe to a certain RPM.
On a go cart, you can regulate the throttle manually (in fact, you want to). The governor is not required, and because you are changing the load, you don't really have to worry about over revving the motor to the point that things break.
ps - if the engine came off a riding mower, you might already have a gearbox. If its from a push mower - I would check the price of horizontal shaft units first, you might be pleasantly surprised.
You can buy a gear box to run a vertical shaft engine, but it is probably cheaper to buy a horizontal shaft engine than to try to convert it.
The governor is in place on a lawn mower for 2 reasons -
(1) when you're using the lawn mower, its not practical to keep a hand on the throttle, but the mower needs to operate at different throttle openings to work efficiently. The governor senses load on the engine and reduces or increases throttle opening as needed.
(2) if you were to just run it wide open, you would overheat the engine and reduce the life of it. Also, the maximum speed has to be governed because the blade is only safe to a certain RPM.
On a go cart, you can regulate the throttle manually (in fact, you want to). The governor is not required, and because you are changing the load, you don't really have to worry about over revving the motor to the point that things break.
ps - if the engine came off a riding mower, you might already have a gearbox. If its from a push mower - I would check the price of horizontal shaft units first, you might be pleasantly surprised.
How do you run a lawn mower engine off a bench?
Tyler
Since lawn mower engines have aluminum flywheels the blade acts as the flywheel. In other words they are not meant to be ran under no load conditions. What can I put on the vertical engine shaft when its mounted to a bench for tuning so that it can run steadily? Is it just weight that it needs or the length of the blade to provide the momentum?
Answer
Oh, come on! If you want to tune a mower engine put it together as a mower. Actually, it should run fine without a blade if the other parts are clean and the carb is running right. It should just idle. I guess the only thing this answer is missing is "You dumbass!!"
Oh, come on! If you want to tune a mower engine put it together as a mower. Actually, it should run fine without a blade if the other parts are clean and the carb is running right. It should just idle. I guess the only thing this answer is missing is "You dumbass!!"
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