Hi and welcome to the site.
Usually when you hear clicking the relay is pulling in but there's corrosion that's preventing power getting to the motor. But if I understand you correctly, you say you jumped across the main relay terminals and just got sparks, so then it (the motor) needs to come apart for a visual inspection.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
Last edited by Destroyer; 05-06-2015 at 12:26 PM.
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