are you giving it a lot of gas or just a little?
So it will idle fine but bogg when you hit the throttle? I'd say empty tank and put fresh gas in it. Warm up the engine too. U could try new spark plugs. Look at the spark plugs, they should be tan in color inside cylinder.[/b]
OK sounds like u can do some work It is an old engine, maybe check compression? Really sounds like a mixture thing though.[/b]