Well I've been out a few times since the plug change and I've seem to have lost some top end. I'm hitting 62 @ 5600 rpm when I used to see 65 solo and a half a tank of fuel and fishing tackle and 67 when I'm real light. I also changed the fuel/water separating filter on the engine, air filter, and separator filter on the boat before the engine. Boat is a 206 Storm bass boat. It feels to be running and idling smooth though..... Is it a good idea to just get the injectors done? I'm not sure if they have ever been serviced. I'm not the original owner of the engine.