Idle Adjustment - Briggs & Stratton 5 HP Troubleshooting & Repair Manual

5 HP Outboard • Troubleshooting & Repair Manual
Section 5 • Assembly
3. Press on the throttle to ensure that it is seated firmly
against the idle adjusting screw.
4. Snug the casing clamp screw. Observe the range of
throttle motion when the hand grip is moved from
to
IDLE HIGH SPEED

Idle Adjustment

1. Start and run the engine at half throttle to warm
engine to operating temperature.
2. Rotate throttle lever counterclockwise to the
position and hold against throttle stop while adjusting
idle speed adjusting screw
1900 RPM (1400 RPM in
propeller in water).
Figure 133 — Idle Adjustment
1
3. Move throttle control to
should accelerate smoothly.
4. Turn the idle mixture screw
the engine just begins to slow, and note or mark the
position of the screw.
5. Then turn the screw counterclockwise until the
engine just begins to slow. Again note or mark the
position of the screw.
6. Turn the idle mixture screw to the midpoint between
the two positions.
stops.
IDLE
to obtain
(Figure 133) 1
gear, with the
FORWARD
2
position. Engine
FAST
clockwise slowly until
2
7. Install the limiting cap
mixture screw
.
Figure 134 — Limiting Cap
8. Move throttle control to
should accelerate smoothly. If the engine does not
accelerate smoothly, open the idle mixture screw 1/8
turn.
65
to the idle
(Figure 134) 3
3
position. Engine
FAST
5