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Hi All, Earlier this year I removed the automixing from my 40hp 2 stroke Tohatsu and have been very happy with the trouble free performance to date. One of the issues that made me remove the automixing was the bogging down and poor idle and excessive oil fowling the spark plugs. Regarding the aperture range of the original oil mixing setup the manual states and I quote "The gasoline/oil mixing ratio varies automatically between 50:1 (2% oil) and 120:1 (0.8% oil) according to throttle opening." Now that I am pre-mixing my fuel and in order to avoid the same bogging down and idle issues I have been mixing my fuel at around 75:1 or 80:1. I must add that I never take the engine up to WOT and at max would take it to 3/4 throttle only. Also I must add that in the manual it states "engines to be operated with automixing system disabled require 50:1 gasoline/oil mixture (2% oil)." Since the aperture setting at idle is set for 120:1 and only at WOT does it require 50:1 what risks if any are there at mixing at 75:1 or 80:1..? I would be curious to know if anyone else is mixing at these slightly higher ratios..? Thanks Dean