My engine is replacing a short shaft 7.5, and it's a long shaft, so there,s no problem with not getting water. The EZ-IN bracket will lower it well below the anti-cavatation plate. Not worried about it since I'm not looking for speed.
The impeller that's in it right now and the housing are original mercury parts. Like I said, the impeller looks healthy, but I'll replace it just to be sure.
Spare.. I don't understand your post?
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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.
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