Another way of seeing the level of the fuel in your bowl, is to take your lower overflow drip hose, and hold it beside the carb pointing up, so the open end is above the carb, bottom still connected, but you have the rest of the hose running up and down on the left side of the carb (I might get a pic if you dont understand) and then loosen (dont remove) the screw right were your drip hose connects. This will let fuel into the hose, at the same height it is in your bowl. Someone will have to check the service manual for proper level, but I believe it is like right at the bowl to carb gasket is the proper level.