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Collection, Preservation and Display of Old Lawn Mowers

Villiers engine as fitted to Allen Scythe

Can any one help with my Villiers engine. It is two stroke and I have replaced the coil. I now have it running but it is either eight or four stroking. The carb is clean and the choke is fully off. I have replaced the spark plug. I have also dropped the needle to see if weakening the fixture would help. I am now stumped  so any advice you can come up with will be appreciated.

Forums

hortimech Tue, 24/11/2015

Hi, believe it or not, there is probably nothing wrong. The 25c on an Allen Scythe is fitted with a governor that works by cutting out the ignition. You will find it if you peer closely at the flywheel nut.

 

wristpin Tue, 24/11/2015

Typical Allen scythe noise is a couple of clean firing strokes followed by a Ding Ding Ding as the governor cuts in a nd kills the spark!

Once heard, easily recognised!

 

IBIENG Wed, 25/11/2015

Thanks for the advice from all of you. I wondered if it was the governor but thought that at lower revs it should sound much sweeter, more like a two stroke. I will play with it a bit more and may be lock the governor down and see it it sounds better.

Thanks again.