Iron Horse throttle control

[crawlersimon]

I have acquired an Anzani Iron Horse recently and have taken it out in the garden for a few short nervous test runs. These have raised an immediate question around the throttle control arrangements.

Am I correct that:
In gear, drive to the wheels should only occur as I move the throttle lever on the handle, and conversely drive should cease (though there would still be some momentum) if I correctly ease off the throttle.

Is this “on” and “off” power a purely manual process dictated by the driver’s thumb moving the lever back and forth? Or should there be / was there ever some kind a spring loaded action to close the throttle when the driver releases the lever?

Though I can see no evidence of such a spring arrangement?

Any advice would be gratefully received! [Are there any other Iron Horse owners in striking distance of the Reading area?]

[mickattwo]

I would think transmission is a centrofugal clutch so the speed is dependant on throttle control

[ritual]

Hi crawlersimon,
I have a few iron horses and they don’t have a return spring for the throttle control. You can set the throttle and it needs the operator to shut it back off to stop. I have a kill switch fitted to the handles for safety, it shorts out the magneto to stop the engine.
I’m not too far from reading, I live near camberley

[Author]

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