YAMAHA outboard 150HP 4 stroke- Idle Adjustment needed - HELP!

[fishiness]

Idling seems to high- how can I lower it- any help would be appreciated.

 

[boscoe]

You can't. The idle is computer controlled. An idle air control valve is used in conjunction with the engine control unit to control the idle RPM. See your Yamaha mechanic.

 

[fishiness]

You can't. The idle is computer controlled. An idle air control valve is used in conjunction with the engine control unit to control the idle RPM. See your Yamaha mechanic.

Thanks for that information -

 

[trynhooker]

where as the idle speed is computer controlled, if the throttle cable/lever isn't adjust properly, it could be forcing your throttle to pull on the throttle linkage i.e., causing the idle to seem too high. Or as one might say, throttling up the engine.

Disconnect the throttle cable, make sure all the linkages are all the way back to the idle position. start the engine and see if the idle goes down. If it does, hold the throttle cable up beside where it connects, it should fit right on without having to pull the lever or adjust the cable length. If it doesn't fit, the cable is not adjusted correctly.