Dynamic Governor Adjustment – Type Nos. Below; Final Adjustment – High Speed Mixture (If Equipped) – Type Nos. Below - Briggs & Stratton Twin Cylinder L-Head Repair Manual

Dynamic Governor Adjustment – Type Nos.
Below 1100
ALL ADJUSTMENTS MUST BE MADE WITH THE
AIR CLEANER INSTALLED.
The following tools are required when making gover-
nor adjustments.
1. An accurate tachometer, such as Tool #19200 or
#19389.
2. Tang bender, Tool #19352 or #19229.
3. A 1/8" (3 mm) diameter, 1" (25 mm) long metal rod.
Start and run engine for approximately 5 minutes to
allow engine to warm up.
1. Place equipment speed control in idle position.
2. Hold throttle lever against idle speed screw and
adjust idle speed to 1300 RPM,
3. While holding throttle lever against idle speed
screw, turn idle mixture valve slowly clockwise
until engine speed just starts to slow (Lean
Mixture).
4. Turn mixture valve 1/2 turn counterclockwise.
5. Still holding lever against idle speed screw, adjust
idle speed to 1000 RPM.
6. Release throttle lever.
7. Move equipment speed control lever until 1/8"
(3 mm) rod can be inserted through the 2 holes in
the governor control plate, Fig. 54.
8. With tang bending tool bend governed idle tang to
obtain 1300 RPM, Fig. 54.
Final Adjustment – High Speed Mixture (If
Equipped) – Type Nos. Below 1100
NOTE: Carburetors equipped with a fixed high
speed jet require no high speed adjustment.
1. Place equipment speed control in fast position.
2. Turn high speed mixture valve slowly clockwise
until engine speed just starts to slow (Lean
Mixture).
3. Turn mixture valve 1/2 turn counterclockwise,
Fig. 55.
NOTE: If the engine does not accelerate properly,
readjust the high speed mixture valve
approximately 1/8 turn counterclockwise
(Rich Mixture).
18
3
19200
Fig. 52 – Governor Adjustment Tools
THROTTLE
LEVER
TOOL
19229
Fig. 54 – Adjust Governed Idle
Fig. 55 – Adjust High Speed Mixture
19389
19352
IDLE
SPEED
IDLE
ADJUSTING
MIXTURE
SCREW
VALVE
Fig. 53 – Adjust Idle Mixture
TANG
DECREASE
1/8" (3 mm) ROD
HIGH
SPEED
MIXTURE
VALVE