Re: '54 evinrude 15hp - worth buying for $300?
I have a 55 and don't find it to be too loud at all really. I do hate the cowling though.
'55 was the first year of the sealed cowl motors and are pretty quiet to me. I just ran my '56 10hp for a couple of miles today, and find it to be quite comparable in noise to a modern motor. Definitely not as quiet, but not bothersome at all. I really like the 10hp, 15hp, and 18hp motors from the 50's. I have a '54 15hp but would rather drive the '56 fastwin 15 I have, which is much quieter, and and has less tiller handle vibration since it has the rubber engine mounts. I forgot to mention to the OP that there is no vibration dampening on the '54 or '53 fastwin 15, which is another reason it is not my favorite 15hp 50s outboard. Still, it's not a huge problem.
I think that is a $200 motor, in my opinion, due to condition. Most of the guys, including myself, wouldn't want to pay that because they already have several motors and don't NEED another one. BUt to the person needing a good used motor, I think getting one like the one you're interested in because even when finished fixing it up, you'll likely only have about $400 bucks in it, and have a good reliable engine. You likely couldn't find a used 15hp motor from the 80s or newer for less than 6-800 dollars in running condition, and parts are MUCH higher, even used, for those later motors. I've bought lots of used motors, and the used outboard that doesn't need work AND parts is a real rarity.
Last of all, since nobody but me thinks it's worth much, I think the condition it's in makes it worth a little more because it has the potential of being a real jewel.
As as someone else said, if you could inspect compression, and feel for connecting rod slop, and check the coils for cracks and lower unit for water, it would probably tell you if it were a good or bad motor and be less of a risk.
Then again, I sold a '55 7.5 with all new coils, resealed lower unit, new pull cord, etc. with a fuel pump conversion for $400, and thought the guy got a super deal. After keeping it for a few days, he did too.
A good 50's 15hp motor should be worth about $2000, in my opinion. They're just too nice of a motor to let go any cheaper.

The truth is, even once you get it running good, it would be hard to get more than $400 for it.
O.k., I'm finally done,:redface:
JBJ