Have a Bayou 220. Book says : float valve needle rod ( loaded and pushed in). I am trying to get the float height correct. Thh float valve is spring loaded. Do i push down to contact or let the float weight do it. I hat metric conversion. Float height is 21.8 what is that in inches? Valve clearance is 0.15-020mm inlet. 0.18- 0.23 exhaust, Help.