I have a 2012 188 SDS with a Yamaha 155 4 stroke OB. The throttle is a stock Yamaha throttle that came with the boat, not sure but I think it is a 6 x 3 (not sure if that's correct, and the manual and boat is at the lake (50 miles away). The throttle was adjusted at the first service because it would not stay in position while cruising (in smooth water) at 4000 rpm, it would creep back. The dealer said it was installed wrong. After the adjustment the throttle really wasn't much better and it has never been smooth at all. It is most difficult to adjust when trying to load at the ramp. It sticks and if you aren't careful you over throttle at exactly the wrong time. My question is: should the throttle operate smoothly and should it stay in place when cruising? I still may be fairly new to boating but I haven't seen one this difficult to operate.