This question is related to a single-engined piston-powered airplane.
I was at a small airport. I noticed another plane parked behind mine. The pilot/owner was in the process of covering up his plane. I walked up to my plane, did some preflight checks, entered the cockpit, did my engine start checks, shouted as loudly as I could - PROP CLEAR - waited a few seconds and then started the engine. A few seconds later the other pilot walked up to me and was enraged that I had started the engine without notifying him. I told him that I shouted but he claims he didn't hear me.
What is the correct procedure/etiquette in this situation?
Was I supposed to walk up to him and notify him before starting the engine?