I've just installed a 15 hp 4 stroke 1995 Johnson outboard on my sailboat. I am setting the carburetors float height. Instead of just giving me a dimension the manual wants me to buy a float gauge. I'm down at the dock puttering with the carb now. If anybody has the Johnson/Evinrude p/n 324891 float gauge, could you please measure for me the depth of the cut out for the 9.9/15 hp carb float height.