Yamaha 25HP 2006 2-stroke Air screw setting

[chrisboat1]

I broke the air screw off on my 2006 Yamaha 25HP 2-Stroke. I ordered a new replacement screw.
What is the proper setting for the screw. It appears to be about 12 turns but how is it properly adjusted.

 

[99yam40]

Re: Yamaha 25HP 2006 2-stroke Air screw setting

If you are talking about the pilot adjusting screw, they are usually measured by the turns out from lightly seated.
Usually around 1 1/2 turns out, but I do not know exactly what your motor spec is. You need to check a manual for your motor modle #

 

[chrisboat1]

Re: Yamaha 25HP 2006 2-stroke Air screw setting

Does anyone have a manual for a 2006 Yamaha 25 hp 2 stroke. If you do could you please lookup the standard setting.

 

[JustJason]

Re: Yamaha 25HP 2006 2-stroke Air screw setting

There is no standard setting. There is a base setting, and you go from there either in or out on the screw from that base setting to fine tune the mixture by ear.
as 99yam40 said, 1 1/2 turns out should get the motor running.

How on earth did you break the screw? If you torqued it down into the carb until it broke, you possibly may need a new carb.

 

[chrisboat1]

Re: Yamaha 25HP 2006 2-stroke Air screw setting

I broke it when i turned the cab upside down to undo the bowl screws. Just pushed down too hard.
Foolish but true.