My latest electric drive project is for a Cat27 (1981) that i picked up at auction real cheap-- $360. , mostly because it had no diesel engine left in it....PERFECT! I tried to pull dampener/flywheel off its 1 inch bronze shaft, but it wouldn't budge, so I removed prop and pulled prop shaft out into boat...might as well re-stuff the stuffing box and buff the old bronze shaft up eh?. So I had a 8-10hp electric motor that i decided to gear down to about 1000rpm for cruising.
The power-shaft of my build was an old Chevy axle which i cut down to 24", I mounted it inbetween off -the-shelf pillow block bearings and spun it via an old washing machine motor and belt, then took a 5 inch grinder to it as it whirled round at 1700 rpm, I worked the metal down like I was sanding a spindle on a wood lathe. The out of balance shaft was soon a gleaming, balanced shaft with a flat faced flange and inset to recieve dampener...the thing looked like it came fro a machine shop! I scored a line at exactly 3.25 inches, and with dividers marked off quadrants to get the location of the 4 bolt pattern. I struck them with a center punch and drill themon my drill press and ...perfect! they match for a smooth balanced bolt up
The motor is held on a tripod support with tighteners to tension and adjust the roller chain side-to-side. I used the old diesel motor mount isolaters to carry the assembly and slide it in for a bolt up.
"EZ - DC" (that's the name of my boat)
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