Motor info

I took my boat to Stokleys to have a tune up(04 Merc 75 hp) and have them listen for a ticking noise I thought I was hearing before my extended warrenty ran out. They replaced plugs, fuel filter and adjusted the carbs. They also checked the compression. My question is what is a normal difference of compression between cylinders?
Number 1) 125lbs, 2) 130 and number 3) 120. 10 pounds between #2 & 3 seems a little much to me. What do you think?

rustedhook

as long as it is with in the 10lb range difference it is ok.