i have on old gamefisher[yea i know problems]......ran great till my dad gave it to me...said they hit a rock and to check it out......well i did...motor runs fine...throttle it up prop spins faster etc,,....so i put it in the water and no forward thrust....sheer pin? ,clutch to motor drive mechanizime??...guess you can still get parts??...sears where i live says no....but i'll check the sears site on the net...tanaka built i presume...any ideas from you guys out there......guess i'll put it on the....... bench and check it out....thanks for any info....donny...