I have a 2001 Suzuki 225 that will not stay running at an idle or a slow troll. It seems to sputter out as sson as i put it in gear. I dont know if this is just an idle adjustment or what but the well known suzuki dealer sprayed a can of something in it and 3 weeks later gave it back and said everything was ok. It doesnt seem to have this problem while out of the water or at high speeds. Any suggestions?