Re: Sears 3.5hp outboard
OK, that's sort of a rare item, made by Clinton for Sears Canada in 1967. Those were sold only in Canada, as far as I know.
As such, it doesn't show up with a parts diagram at
www.searspartsdirect.com
If it did, I'd be able to see the fuel fitting. If it looks like an air hose quick disconnect thing, then it's a Chrysler fitting, which should be available at any marine store or right here on iboats.
If it's something else, I recommend replacing the fitting on the outboard with a standard Johnson/Evinrude fitting. You may have to do a bit of reverse engineering, but that'll be the easiest and least expensive solution.
Parts and stuff can be had. There's an ebay seller who specializes in Clintons. Search for Clinton outboard parts on ebay and visit his store. Stuff like points and carb kits should be readily available. Other stuff, not so easily available. You may even be able to find a manual, although it'll have to be for another 3.5 hp model from around the same time. Very few changes were made in these things over the years, so any mid to late 60s 3.5 hp Clinton will probably use most of the same parts as yours.