The Stovebolt Site Forums The Shop Area Engine Shop starting up 54 COE that has been sitting outside

2 years isn't bad at all, especially if it has an air filter in place and an exhaust system. That means that the cylinder rust is minimal.
however, I have a standing rule for any engine that has been standing (out side my care) for "a while" - DO NOT rotate the engine until you remove the plugs, squirt in a good quantity of mystery oil or another penetrating oil and let it set for at least 24 hrs. Then gently try to turn it by hand. If it turns good, if not repeat.
You can never UN scratch cylinder walls or UN break rings.
Note: to avoid a mess, once it will turn, cover the spark plug holes with rags and the inner fenders as well, and crank the engine over with the starter (plugs out) until the cylinders are cleared out. Then try to start it.