and also....I know it's been up here before on the mixture ratio thing, but my Johnson has a sticker right by the fuel inlet that says 100:1....I've run the mixture at that since I got it and have had zero problems....smokes just a little when cold, then clears right up and starts first pull everytime after......point being, I would'nt be so married to the 50:1 figure...
I know of some hi-po two-stroke motorcycle guys who swear by 125:1 for their machines, even though the factory recommended no more than 40:1. Granted, these are some really hard-core hill climber/sand dragger guys with bikes that have been extensively modified and that normally only run about 5-10 seconds under full throttle....