Yes, Friction fit it OR if the motor sticks out past the mount tube by 1/2 inch or more you could put a wrap of 3/4 inch masking tape around the outside of both the motor and tube. In either case make sure the motor won't come out without a strong pull. (Ii'm old enough to remember when estes put this in the engine instructions)

Edit: found this link showing a frition fit http://www.ninfinger.org/~sven/rock...a/69estp52.html

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