Dave Butler wrote:
snip

Is there a simple way to tell, say from the engine model number,
whether an
engine is equipped with the movable type of crankshaft
counterweights?

How are the movable type of crankshaft counterweights attached to the

crankshaft? Does anyone have a picture or drawing or explanation?
snip

http://www.sacskyranch.com/detune.htm

regards;

TC