1995 186 champion 1996 175 EFI mercury motor with brand new 24p tempest prop. 6 inch jack plate 3 inch prop to pad. 45 mph 12 psi water pressure at WOT. Verified wot linkage hits stop and butterflies are perpendicular to intake. Engine seems to run great on muffs from idle up to 3000 rpm. Engine seems to run great on the water just no top end. New water pump impeller, fuel line, Fuel filter, primer bulb, spark plugs. What am I over looking?