We had one for pumping water a LOOONG time ago. It did not have a carburetor on it. It had a mixer that was like a straw in the intake that drew white gas from a little cup. In order to start it, we made sure the coil was disconnected. We took a rag soaked, dripping, with gas, and pushed it into the intake, turned the flywheel 4 full turns, removed the rag, connected the coil and spun the flywheel HARD. Sometimes we had to prime that beast a couple of times, but once it started, it was hard to stop. It did NOT have a throttle. It had a little centrifugal whirligig that controlled the intake valve. When it needed a boost of power,, it would allow the valve to close, causing the cylinder to pop, taking in a gulp of fuel and air and making the flywheel spin a tiny bit faster. Then the valve was held open and the engine freewheeled with no compression and no air coming through the mixer.
Hit and Miss meant just that. it ran about 700 RPM and it only "hit" when it slowed to about 675.
Hope this helps some of you youngsters.![Roll Eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
##EDIT## I think it held the exhaust valve open. I think the intake had no rocker, just a weak spring. It was sucked open by the piston descending when the exhaust valve was allowed to operate. When coasting, the exhaust was open and huffing.
Another interesting fact is that the cooling system is a large tank cast onto the cylinder. It has no lid, water is poured in and just evaporates as it runs.
Hit and Miss meant just that. it ran about 700 RPM and it only "hit" when it slowed to about 675.
Hope this helps some of you youngsters.
##EDIT## I think it held the exhaust valve open. I think the intake had no rocker, just a weak spring. It was sucked open by the piston descending when the exhaust valve was allowed to operate. When coasting, the exhaust was open and huffing.
Another interesting fact is that the cooling system is a large tank cast onto the cylinder. It has no lid, water is poured in and just evaporates as it runs.
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