i have a 75 20 hp ser.202hg, it has a tillotson md139a carb, the motor runs strong, good compression, changed the water pump, run a couple times and the carb takes a dump long storey short i was told i could not get rebuild kit or find a carb for this motor. a friend gave me a carb off a newer modle force but the intake flange is horizontal and mine is vertical. anybody know if i can retro fit a differant modle or make of carb. any info. will be greatly appreciated.