Run a Versatile 103 for 21 yrs, rebuilt the V4G twice ,1964 model ,yours might have the hand crank assembly. The needle valve in the carb would get a ridge in it after awhile, will run okay with the choke pulled out a bit 240 grit emery cloth will tune up the needle valve. Remove the plugs & run penetrating oil in cylinders. Look at dist cap for cracks & rust on inside,check the rotor for rust,cracks ,make sure it fits tight on the dist shaft. Check the points ,should have a clean contact end. If the motor really knocks when you get it going ,there is a couple of 1/8th pipe plugs on the intake manifold remove one 1 & pour water into it, will get the carbon out. These old girls like 90 + octane leaded gas.