I'm working on the assumption that this motor may not be the best option, between what it needs and how much power it makes. Taking stuff apart is free, its putting it back together that costs money. I'm making a list with all the parts it needs and what they will cost me and will then compare that total to what is available for purchase.
I'm starting working on the motor. The foot seems to have an issue. Previous owner had removed the locking ring and attempted to pound the bearing carrier out by turning it using a drift. He broke off an ear, scared a few and gave up. After searching YouTube I figured out you just need to use a puller. I got the carrier out and of course bunch of sand and dirt and grit slid down in. I need to get everything out to clean it well. The gears bearings and prop shaft look good. Not super happy with the pounded on housing but it looks to be useable. I got the nut off the drive shaft gear, got the gear loose from the shaft but I cannot get the drive shaft to pull straight out. The only thing I can see that might be holding it in is some sort of plastic base to the water pump housing or whatever is below it. I really don't want to break it. Does that housing have to be removed to get the driveshaft out? Or is there some other Secret.
poor ol merc!
I had a 50hp merc I ran on a 14 ft grew fibreglass a couple decades back and it would run about 40 or so mph with 400 lbs of people on board with a 2 blade bras prop and around 32 with double the people load..
I am not sure of the hydrodynamics on a clipper to know how a 50 will push it but I think 50 will do ok but not awesome if carrying more than 2 skinny people and propped right .
who knows maybe you are not a speed demon and would rather cruise nice and easy anyway and save fuel in the process.
I still have a 50 merc now on my dolphin personal watercraft, I really like the motor.
I don't find the motor too heavy, I also have a 35hp twin merc that is pretty much same weight.
in my shed now I have a 65 merc and a old v4 75 Evinrude and compared to the merc, the Evinrude is a elephant!
I think my 100hp merc is lighter then the rude
on your merc, it may cost more to revive the old girl than it is worth,i would be concerned about sand down the carbs and without disassembling I would be worried.,
if it has compression and spark ,clean out carbs add some fuel and lite it up and see what happens
it would make a great parts unit if it didn't run
if it did turn out to be a good motor, find a second and run twin 50's ,then you will have one bad ass clipper!
look like the 1957 clipper brochure
around here where a good 70's 50 merc goes for around $4-500
twin 50's was a close second choice to a tower for my clipper and if I had a short transom I would have bought another 50 as I already have a 50 shortty on hand
May be a bit underpowered. Mu DC, since sold, came originally with a 70hp straight tower of power dock,buster, ie no gear box. Reverse was accomplished by the ending starting backward. I,would,imagine performance would be Effected on what prop is on the 50. If you can get the 50 running inexpensive;y, would be a good,start. My very future plans are a Deluxe Clipper with as big 6 tower,of power,I,can find. Friend is trying a 3 cylinder Johnson ;70hp looper on his DC...
My new to me Deluxe Clipper came with a 1973 Mercury Thunderbolt 500 50 horsepower four cylinder 2-stroke outboard. This thing is amazingly heavily compared to my 30 horse Johnson. I received the motor partially disassembled with the hood and foot removed. This poor thing languished in a sand filled backyard for a decade and was filthy, there was sand everywhere. It is mostly complete, I think. I got the controller which has good cables but horrible wiring to match the mess on the motor.
Thus far I have cleaned out all the sand that I can including from inside the carburetors. On the mechanical end I've run a compression and electronics test. Compression is an even 150 psi on each of the top three cylinders I can reach and all 4 of the the spark plugs fire.
I have a few questions. Does this motor have any known good or bad points that I should be aware? And is 50 horsepower really enough for this big rig?