i have a 1980 johnson 25 hp, is there another way to adjust the idle besides the low speed adjustment knob(lean/rich)? i put a carb kit in it and i cant get it to idle without a sputter about every 5 seconds or so. it doesent die but its not completeley smooth like it was before the kit was installed. and on a side note i want all of you to know i will give my right arm and half of the left one if anyone can tell me where to find a gearcase housing/skeg without having to buy the lower unit new or used, or a shot lower unit that i can take it off of. ive been trying to find one for a year and have searched everywhere under the sun with no luck.