Re: 1940 – 1942 Sea King 15.2 hp twin

[Anonymous]

https://web.archive.org/web/20110518201930/http://www.antiqueoutboardmotor.info/Outboarder/1972/jan72-21.html
(should also be in the inner sanctum, but I can’t seem to log in at the moment)

My notes say:

* magneto, flywheel, carb from Speeditwin
* cyl from Elto Sr Speedster
* pistons, rods from Speedifour
* LU, clamp bracket from Sportfour
* crankshaft rotary valve
* square tank
* "as fast as an average PO"

Gary wrote:

I believe it was the same as the Evinrude model 9039 Heavy Duty
Twin. With a 2-1/2" bore and 2-1/2" stroke it it a 24.6 cubic inch
piston displacement. It’s rated at 15.2 horse power @ 4,000 RPM and
weighs 100 pounds. (The Speeditwin weighed 105) The 2-1/2 gallon
tank was the same as used on the Speeditwin and the Commercial Heavy
Duty Lightfour Imperial. It is essentially half of a Speedifour
with a smaller gearcase. About the same size and weight as the
Sportfour imperial.

This image from Doug Penn’s web site:
http://penn.itgo.com/cgi-bin/i/images/s … g-15hp.JPG