Here is the story on the Mark-7. A museum
had it stored in an unheated storage building.
It was just laying on the floor under a plastic
tarp. The magneto lever was frozen solid.
I gave them the $50.00 they were asking.
The motor had a 1959 Ohio registration tag.
Its a 1953 and I suspect it last ran in 59.
The plugs were J-7-J’s and they had never
been fired. Its been a long time since you
could buy any of them. Most spark plug
charts don’t list them anymore. Gas tank
and carb were clean. No water in the gear
case. Impeller had taken a set but it was
still tight in the cartridge. So I put some
OMC style coils in it, along with some
fresh105, washed off the silver painted parts,
and waxed the green parts. Stuck it in my
trash can, put in some gas, and it started
right up.
I did put the red paint in the mag lever but
the rest of it (I believe) is original. There
are some scratches in the tank paint though.
I wouldn’t be surprised if that happened at
the museum. I ran it a couple times a day,
most every day, for about a month two
summers ago. It will do 20 mph on a 12′
Sears and sounds like it’s doing 100. I got
some ear plugs on about the 3’rd day. Showing
my age I guess. Great motor. Its a surprise the
first time you slide the mag lever over to fast.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.