Its pretty easy to check if its the control cable (from shifter to engine) or the shift cable (from engine to drive).
-) Make sure your shifter is in Neutral when you start this procedure.
-) Locate where the control cable connects with the shift cable on your engine. The shift cable is the short one that goes to the transom
-) Disconnect the shifter cable from the control mechanism. Make sure you don't spin the adjustment barrel.
-) Start your engine and move your shifter from N to F, then back to N, then to R. If it shifts smoothly, its not your control cable.
-) Put the shifter in N, and ensure your engine is still idling
-) Now go to the shift cable in the engine area, a small pull/push on the cable is all it will take shift the drive into F and R. Be careful here.
-) If it doesn't shift easy (and I mean it takes really no force at all), then your problem is either shift cable or something with your drive. At this point, you need to have the boat out of the water for further testing.
__________________
|