On my engine (92 Johnson 200 LE)on the top of the powerhead on the starboard side there is a plastic piece(long cylinder with metal rod and adjusting cap on other end with locking nut) that controls the timing advance...I think. That was replaced just prior to me purchasing the boat. Anyway, the boat had a very high idle when I got it messed with the throttle cable to get it down to about 1000. What is the proper way to adjust that plastic piece and set the idle. Ok so maybe it wasn't a wuick question just wanted to give you all the info I could!!

Thanks!
Joe