Page: 4-69
WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Idle Mixture Screw Adjustment
If engine is equipped with a secondary governor spring
as shown in Secondary Governor Spring illustration,
check governor lever adjustment procedure before
starting engine.
Secondary Governor Spring
Final Adjustment
All carburetor adjustments with engine running must be
made with the air cleaner installed as done at the fac-
tory.
The following tools are required when making carbure-
tor adjustments:
1. An accurate tachometer, such as Tool #19200 or
#19389.
2. Tang bender, Tool #19352.
Adjustment Tools
Start and run engine for approximately 5 minutes to al-
low engine to warm up.
1. Move control lever on equipment to SLOW posi-
tion.
2. Hold throttle lever against idle speed screw and
temporarily adjust idle to RPM shown below.
a. 1400 RPM - Governed idle spring Part
#805453 (red).
b. 1100 RPM - Governed idle spring Part
#805454 (white).
Adjust Idle Speed
3. Turn idle mixture screw slowly clockwise until en-
gine speed just starts to slow (lean mixture).
4. Then turn idle mixture screw counterclockwise until
engine speed just starts to slow (rich mixture).
5. Turn screw to mid point between rich and lean.
Parts Removed
for Clarity
Idle Mixture
Screw 1-1/4 Turn
Loop Faces Up
Secondary
Governor
Spring
Primary Governor
Spring
Loop Over Tab
#2 Hole
Generators
#1 Hole
Remote
Control
19200
19389
19352
Idle Speed
Screw
Throttle
Lever
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