V1 C Villiers engine on an Allen

[vhgmcbuddy]

I am having a little problem with my Allen, just got it out of storage and didn’t start so I stripped the mag and cleaned the points. Good spark but will not rev with any gusto.
It is the first time I have had this engine down and the only difference I found with this engine was a small counter weight on the outside face of the flywheel, I didn’t recognise it as any useful piece so I removed it.
Would this useless piece actually cause the engine to run rough?

[andyfrost]

Phil ,if you mean the cam on the inside of the flywheel (the part that opens the points) the “counterweight” as you describe it is actually the engine govenor system , the idea being that centrifugal force operates and opens the points too wide for a spark.
Allen Scythes were the only machines that I have seen that use this method , the 25c fitted later also deployed this method.
They will sound rough running without any load , put them into some serious work and they will even themselves out.

Andy.

[vhgmcbuddy]

Hi Andy, The weight was on the outside of the flywheel, when I first saw it I thought it was the cover to allow access to the points. It had a spring that was pushing on a screw that seemed to serve no purpose.
The running of the machine is a mystery. The machine runs like on tick over and the speed improves very little when I open the throttle, I have no book for this engine, looks like the 147cc and I first set the points at 3/16″ TDC but changed to 1/8″ because of backfires and I couldn’t start it. I would be happy if the throttle made a noticeable difference.

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