Small Engines (Lawn Mowers, etc.): starter sprocket spins but does not engage, craftsman riding lawn mower, starter clutch

Question
Paul, My question pertains to a Craftsman Riding lawn mower (Model #:917258522 with a B%26S 15.5 HPOHV engine (model #28N707). When I attempt to start the mower, the sprocket on top of the starter spins, but does not spring up to engage the larger sprocket.  When I jump start directly from the battery, I get the same result.  I tried to jump start from a car, but nothing happened, not even a spark.  I must not be doing this correctly.  Battery tested OK at a parts store and the starter tested OK (i.e.,the sprocket spun and sprung up to the correct position).  Any ideas? Thanks much for your help.   Eric

Answer
HI ERIC

ARE YOU SURE YOU HAVE BATTERY POSITIVE CONNECTED TO STARTER TERMINAL AND NEGATIVE TO GOUND

IF YOU HAVE THIS COUPLED UP  WRONG  IE  BATTERY IN THE WRONG WAY  STARTER WILL TURN BACKWARDS ANS   STARTER CLUTCH WILL NOT ENGAGE   HAVE SEEN IT BEFORE   CHECK THAT YOU HAVE BATTERY IN THE CORRECT WAY AROUND ?   STARTER MOTOR SHOULD SPIN  ANTICLOCKWISE     AS ENGINE RING GEAR/FLYWHEEL TURNS CLOCKWISE  

HAS THE STARTER MOTOR BEEN APART AT ALL

IS THE S/M PINION AND HELIX  IN GOOD CONDITION , DOES THIS STARTER CLUTCH HAVE A ROLL PIN  THROUGH THE  SHAFT RETAINING  STARTER CLUTCH ?


CHEERS LET ME KNOW  IF ITS THE BATTERY ?

CHEERS PAUL