cool video, reminds me what I'd done back in '96 planting a 4.5hp lawnmower briggs atop a 6-7hp outboard lower unit that I'd gotten free for the asking from the local boat shop. it was a siezed-ruined powerhead they didnt want to bother with. the first step was removing and disassembling the powerhead, once the crankshaft was in hand.. oh heck no my trusty hacksaw wouldnt touch it, until after I'd cooked it over my gas stove burner for near an hour to draw down the case hardened bearing surface.. then it was doable. after I'd got it loose, turned the "new" face of it in a lathe to get it flat, and welded it to a steel lawnmower blade hub for a briggs, also done while on the lathe so it'd be as true-centered as possible, fun fun fun (yeah sure). gotta have that spline! for mounts, I cheated (kinda) using bits of pipe, washers, bolts, nylock nuts etc, but was only messing with 4.5hp anyhow too, so it was plenty solid. hooked the throttle to the tiller twist-grip was simple enough, some pipe out the exhaust port down to the cav plate and it was done. ran great, SIPPED the gas, did 11-12 mph tops, sounded like a lawnmower. a little paint and it near looked like it belonged there. the video is cool, but gee look at all that nice custom milled billet aluminum.. easy enough if ya have access to a bridgeport and a little time to do it sure. 55hp is a pretty big unit, theres a few good things you're going to want to know, how big a motor, where to get it, will it spin up some 5-6000 rpm's for the lower units gear reduction (typically 1.7:1 to 2.2:1 ratios)? are there gonna be appropriate props for a possibly lower output electric motor (is gonna be a lot to do with amp draw etc)? with all the make-model-year outboards out there, I really doubt you're going to find anything "standardized" available plans or kits, and big power is likely going to be far beyond anything MY budget is gonna allow, "but aint nuthin impossible" either lol. for a smaller outboard I'm sure it'd be an easier job, even without machine access. I've had some fun recently playing with "bondo-glass" to make a motor mount, with just typical woodworking tools, but thats nowhere near anything 30-50 ponies to stress it. working the stuff isnt nice, theres the itchy, the lungs, the brushes and bearings of the tools etc too. if there were a boat shop close to where I'm at now, heck yeah I'd be looking for a 3-4hp engine that was done and given up on, to play with just fer giggles. might be kinda rough to find 2000-3000 watts that'll spin 6000 rpm to plant into the little thang... is in the 2.68 to 4hp ballpark, and less than 1800 watts might be begging for problems. something like that'd probably tuck under the hood pretty easily too, likely room enough for 2 1000w motors and belt driven driveshaft, would probably be a little nightmare mounting em. something like that might be pretty decent in a 12-14 ft tinny or flatbottom skiff. others in this group DO know a lot more than I, just sharing from my perspective bout it. theres some commercially made big electric outboards out there, real spendy! "bad power pack", is that about the ignition coils or is the powerhead itself "done"? most OMC parts are fairly available-replaceable-interchangeable. electrics ARE cool, but 50hp worth of smoky-piglet can be lotsa fun! --- On Fri, 6/1/12, Bryan Harmon <bryanlharmon@yahoo.com> wrote:
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