Got new carb and gaskets and gas builds up in cylinder so it gets gas have had it start by hand choking but only runs when choked do you think maybe not enough spark my first time with a Honda?

Answer 1

You certainly want to check the condition of the spark by all means. But your problem does not lie with a weak spark since you say it runs when it is choked. The problem lies in fuel delivery to the carburetor or to the combustion chamber. Two things you want to check before you attempt to adjust the carburetor: (1) ensure the fuel filter is clean (2) look for kinks in the fuel hose or debris in the fuel tank. Assuming all is well, including a clean spark plug with a "fat" spark, adjust the carburetor as follows: 1) rotate the carburetor main jet needle valve clockwise (close) until it touches its stopping point - DO NOT FORCE OR GO BEYOND THE POINT OF TOUCHING as it may damage the tip. (2) Rotate the needle valve counter-clockwise (open) 1-1/4 to 1-1/2 turns - this should be close enough to start the engine. Start the engine and let it warm up about five minutes. (3) Rotate the needle valve clockwise (close) slowly until the engine starts to stall for lack of fuel, then rotate the needle valve counter-clockwise (open) slowly until the engine starts to stall from flooding (too much fuel). (4) Set the needle valve to a midpoint between the two extremes for the best "purr" of the engine. If the engine "sputters" when a load is added, open the needle valve an extra 1/8 turn for a slightly richer mixture.