service CAUTION! Rep hands clear of the Chain/Sprocket drive system. Remove the battery wire from the Battery‘s POSITIVE post, to remove all electrical power BEFORE attempting any repairs or adjustments. CHAIN TENSION: Adjust-the Chain to-allow between-1/4 and 1/2 inch of play. CAUTION! If the Chain is over-tightened , the motor life will be reduced. ® Loosen (do not remove) the bolts which hold the motor mounting bracket to the Reel.