Re: ROTARY VALVE MOTORS??? What is it?

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November 17, 2015 at 4:29 pm #27245
jim-moffatt
Participant

    US Member

    Jerry

    I have had a whole series of 1930s rotary valve motors, including your 1933 Lightwin. The Lightwin had a rotary valve only in 1933 through 1936 (I think
    ). The advantage is that it will run faster than a poppet valve Lightwin. The disadvantage is that they wont idle as slow because the rotary valve doesnt seal perfectly like a poppet valve. They are not good fishing motors but a lot of fun to run.

    Your carb does not have a choke only the primer plunger. The primer works extremely well, better than a choke in my opinion. The plunger squirts fuel into the crankcase through a separate tube at the back of the carburetor. you can test it with the carb off the motor.