Hi Rod How often should I run ringfree in my 2003 115 2 stroke and should I run any other additives and how often. Thanks Boats P.S. I took my boat in and they adjusted the choke somehow and now it starts much better. Also now it does bog down when I push in the choke while running.( it didn't before as I wrote you previously) $118.00 sound about right? choke adjust & systems check Thanks Rodbolt