PLEASE don't use the onboard gas tank for a wake-up run after the vehicle has been sitting for a long time. Varnish and other gummy stuff from stale gas (even after draining and refilling the tank) will deposit itself on the valve stems, and at the next startup you'll end up with stuck valves, bent pushrods, and possibly some broken rocker arms. Always use a remote tank like for an outboard motor, and either remove and steam clean the onboard tank, or replace it. I also like to soak the valve stems and guides with spray carburetor cleaner and lever the valves open and closed repeatedly before the first startup.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!