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What kind of RPMS does the 48 turn at full throttle? What was was the model number on the 50 you took off?
have you checked spark on both cylinders? Will it idle for a long time, or will it only idle for a short time and crap out?
The carbs have to come off and then fully come apart. Everything except for the throttle plates has to come out. So that means every jet, every screw. When I do when I clean them is I soak them in a little hot water that has a mild degreaser in it first. Then I rinse them in hot water. After that they go in an ultrasonic machine for 45 mintues. I pull them out. And then rinse them again. And then blow out every passageway with compressed air from a blowgun. In lieu of an ultrasonic machine what you would do is use spray carb cleaner through every passageway instead. Then the carbs go back together with new carb gasket kits, get reinstalled, and syncronized.
I do want to make sure you are happy with the service I am providing to you before you go. Did you have any other questions on the engine or do you think that covers it?
Good morning. Just checking in. Any luck?