Is there an easy way to get to the idle/throttle stop screw?

The shop manual for the HRX217HYA says that idle speed should be 1,700 rpm with + or - 150 rpm. My tach shows the idle speed to be about 1850-1900 rpm with throttle lever at 'SLOW' detent. According to the manual I need to adjust the 'throttle stop screw' to achieve the correct rpm. My three questions are:

1. Is there an easy way to get to the screw (see attachment)? The diagram shows an inserted screwdriver but there is not enough room to do this! What components do I need to take off to get to it? I can see it behind the air filter housing but can't get the screwdriver to reach it.
2. Will adjusting the idle speed mess up or change the fast/running speed when the throttle lever is in 'fast' position and roto-stop engaged which should be at about 3100 rpm?
3. Should I leave the idle speed alone and not worry about it?

Idle screw.pdf

Attached Files

• Idle screw.pdf (46.6 KB)