Have a 2006 24ssv Gravity Games with the 340 Indmar engine. Our first boat. Second time taking it out the revs started acting funny. When I move the throttle back to neutral the engine would increase revs to about 1300-1500 and stay there. If I press the throttle only button and rev the engine and then back to neutral it returns to normal. Likewise if I turn the engine off and restart it returns to normal. It will do this again and have to repeat process. It doesn't do it all the time but it seems to be happening more often and moreso after running the boat under load. It seems like I need to move the throttle forward quite a bit before the engine engages from neutral, could it be a loose wire or spring? Any ideas what this can be and if I can tackle this myself or do I need to take the boat to a dealer. Just worried if I take it in and not under same conditions they wont see an issue. Thanks for any help.