Regarding the Zephyr Saildrive as a detuned 35 horse to a 15 horse is it true fer sure, fer sure that the oil/gas mix can be as high as 100:1? Whew! That is way under the manufacturers recommendations. Will this (does this) reduce the amount of smoke and FUMES from the exhaust. When I run mine on dead calm days the fumes curl around into the cockpit. Not good! I would love to find that I can use less oil. I gotta believe that it will help cut down on the fumes somewhat. I have heard that there is an oil available at garden implement shops which requre very little oil. I'm going to check witht the mechanic who recently rebuilt my engine and see just how low a ratio one can safely use and still not fry the engine. I still would like to hear from anyone who has experience on this. Thanks, Mike