Diesel Shunter

This is the same as in the 1970s set 3 manual. A major problem is the drive from the motor to the wheels. There is not enough tension in the rubber band for it to move. Does anybody have any suggestions as to what (if anything) I have done wrong?

Brian Elvidge concurs that this is a poor model. By substituting the ½” Pulley with a 1” Pulley however it springs into life.

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