2003 75hp 75ELPTO fast idle when warm

[six20aus]

Hi all
So just replaced the plugs and the boat ran like a dream initially then did what it has done since I've owned this engine - started idling higher - don't have a tacho so no numbers but having heard others I'm happy its cold idle is ballpark and its hot idle is 'too fast' (as opposed to ridiculously fast).
I know its too fast since one warm its slams going into F and even worse in R. Doesn't do this cold. I tried lowering the idle at the global idle screw adjustment but if I go any lower it starts to miss. I also put new fuel and a Nulon carb/engine cleaner thru it wondering if it was some sort of cylinder buildup thing going on but no real change other than giving me a heap of smoke for about five minutes and now less smoke than I was getting before.
How do I fix this please ? Thanks for taking the time to read this.

 

[Texasmark]

Idle is set by engine timing on that engine, just like my 2002 90 and 115, at 675 +/-. Timing is right around ATDC (At Top Dead Center) when idling and as you increase the throttle, the timing advances to about 22* BTDC (Berfore Top Dead Center) at WOT (Wide Open Throttle).

Coming back down from WOT the timing remains full advanced for a bit as the carb butterflies start closing.....fuel economy reasoning, and then the timing starts to retard as the throttle is reduced.

My gut feel, hip shot is that your timing advance lever, or the stator assembly that rotates under the flywheel is binding when things get warm and expand preventing proper movement back to ATDC positioning area at idle.

 

[six20aus]

Idle is set by engine timing on that engine, just like my 2002 90 and 115, at 675 +/-. Timing is right around ATDC (At Top Dead Center) when idling and as you increase the throttle, the timing advances to about 22* BTDC (Berfore Top Dead Center) at WOT (Wide Open Throttle).

Coming back down from WOT the timing remains full advanced for a bit as the carb butterflies start closing.....fuel economy reasoning, and then the timing starts to retard as the throttle is reduced.

My gut feel, hip shot is that your timing advance lever, or the stator assembly that rotates under the flywheel is binding when things get warm and expand preventing proper movement back to ATDC positioning area at idle.

Thanks so much I will look into this