Thanks Bill,

I was thinking about the inverted thing but did not want to push my luck. What's weird here is my OS 61 2 stroke was about 2/3 inch below and I had absolutely no problems with it. The 91 4 stroke purrs nicely from idle on up to full throttle.

That is why I am pretty convinced on the low speed thing. If all of the testing and tweaking was already done then I have just stuck my foot in my mouth (not the first time, tastes funny too [:'(]) and I apologize.