Section04FUELSYSTEM
Subsection 02 (CARBURETORS, THROTTLE AND CHOKE CABLES)
1
A32C71A
2
1. Idle speed screw
2. Pilot screw (one on each carburetor)
Pilot Screw Adjustment
Completely close the pilot screw (until a slight
seating resistance is felt) then back off as speci-
fied.
Turning screw in clockwise leans mixture and con-
versely, turning it out counterclockwise enriches
mixture.
ENGINE TURNS
All
1.5
Carburetor Synchronization and
Throttle Slide Height (preliminary
idle speed adjustment)
First proceed on PTO carburetor.
Use a drill bit to measure throttle slide height (see
following table) on outlet side of carburetor (en-
gine side).
Adjust by turning idle speed screw no. 15.
2
A32C72A
13
1. Adjust PTO carburetor first
2. Drill bit used as a gauge to measure throttle height
3. Idle speed screw
For MAG carburetor use synchronization screw.
Use same drill bit as for PTO carburetor to mea-
sure throttle slide height. Turn synchronization
screw to adjust.
2
A32C73A
3 1
1. PTO carburetor adjusted first
2. Drill bit used as a gauge to measure throttle height
3. Synchronization screw
NOTE: Make sure that throttle cable does not hold
throttle slide. Loosen cable adjuster accordingly.
Final idle speed adjustment (engine running at idle
speed) should be within 1/2 turn of idle speed
screw from preliminary adjustment.
190 mmr2005-077
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