4 1/2 sounds like a lot. You might try dialing it back a little at a time to see how it runs. Factory initial setting is 2 1/2 turns, with a range of 0 to 5 turns.
Jon
Good carburetion is fuelish hot air The most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes! The Carburetor Shop
