Hi Waco Driver,

Thanks for the very detailed analysis. Your thinking regarding the venturi is the same as Don H out of Brantford, in fact you may both belong to the smae club - you may want to give him a call.

I personally stick with the Fox Idle Bar plug, the price is right, its been around for many years and seems to work in all my engines. The only time I've seen them let me down is if I use them during engine break in - they fail prematurely after that. Typically I'll use an older plug for breakin.

I live in Kitchener, perhaps we'll get a chance to meet and compare notes.

Fly4Fun,

Wayne Miller