Got it to my mechanic today. Says the check valve in primer bulb not working. Idles Fine, will have to get on lake under loadChanged fuel filter, and spark plugs. Fingers Crossed this fixes it.I hate the poke and prod to figure out these problemsSays number 4 compression is down to 85, the rest are 100-110. $5600 for a overhaul for a 2001 Merc 200? Good deal?