C182 pilot reported during cruise flight experiencing loss of engine power resulting in the pilot landing at the nearest airport.

Narrative

SITUATION: Precautionary diversion due to concern over engine performance. DATE: Day 0 ZZZ to ZZZ1. AIRCRAFT: C182Q. WEATHER: VFRDuring a cross country flight from ZZZ to ZZZ1; near ZZZ2 I was cruising along at 11;500 ft MSL at 140 kts. During a handoff between ATC facilities; about 13 NM North of ZZZ2; I experienced a sudden loss of engine power; where the engine fell to full idle (apx 710 rpm) and the propeller was windmilling. I then told ATC that I may have just lost my engine; I was given a minute to figure out my situation and then ZZZ ATC told me they are providing priority handling for me. My first thought process was to do the ABC's; so first I flew the airplane and pitched for best glide (70kts); next I did my checklist procedures as I already had ZZZ airport in sight and had plenty of altitude to make it in safely; I then did my restart checklist; and once I selected fuel on 'both'; I was able to restart the engine and gain power back after a momentary loss. I lost about 1;500ft of altitude within that period but was continuing to pitch in for runway XX at ZZZ2 as I was pretty high at the time. Once getting settled in on the approach; I was handed off to ZZZ2 tower (XXX.XX) and cleared to land on runway XX and I had a normal approach to land.During the emergency checklist; as I covered the third item on the checklist 'Fuel Selector……Both' this is when I realized I didn't select the detent on the right side correctly; even though it was selected on the right side; it wasn't fully in place. Therefore the cause of my engine failure was fuel starvation. The engine was not able to pull in fuel from the right wing/fuel tank. So; when I flipped the switch to 'both'; this is when it only took just a few seconds for the engine to restart with full power. At this point I felt everything was safe and normal with the aircraft as a whole; but I wanted to make a precautionary landing in order to checkout the airplane on the ground; and do a thorough inspection of systems.What I have learned from this scenario is that it is very important to double check the position of the fuel selector to the proper position. This will be a one and done situation; and will not occur again. I am thankful that I was able to adequately maintain aircraft control; maintain focus and run through the checklist to restart the engine successfully as I've been trained. I feel it was a success that I was able to isolate the problem and correct it. I feel from a mentorship perspective that I can share this scenario to prevent other fellow pilots from having the same situation occur to them.S(ituation)- I lost my engineT(ask)- I flew the airplaneA(ction)- I did my checklist and restarted the engine (ABC's)R(esult)- I landed safely in ZZZ2 and discovered the situation.