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P S . . .
Many find the shear size of this antique intimidating. Just pulling on the rope to turn it over can take considerable effort, However both cylinders going on compression at the same time also means you have almost 40 degrees at the bottom of the cycle when the ports are open and the outboard turns freely. So, the starting technique is to wrap the rope around the rope sheave so that turning it counter clockwise gives you about four inches of free rope. This gives you the ability to bounce the flywheel back and forth at the bottom of the stroke. Timing the force of your pull to the clockwise bounce of the flywheel will give you the added energy to easily crank the motor. . . 😉
In 1947 a pint and a half per gallon was recommended. I have been experimenting with a half a pint of Synthetic TCW3 and half a pint of Low ash aviation 40 weight oil. Lately Steve Woods has been mixing the fuel and I am not sure what it is , but Steve uses it in his Big Four. Dad used a gallon of SAE 60 weight to four gallons of unleaded high test gasoline in his Big Four, but it was extensively re-engineered and ran his 13 foot Lyman to a 54 MPH two way average through a measured mile. . . 😉
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