Briggs & Stratton 203721GS - Manual (Page 8)

1. Clean area around fuel fill cap, remove cap.
2. Slowly add fuel to fuel tank. Fill to red fuel level
indicator (A). Be careful not to overfill tank.
3. Install fuel cap and let any spilled fuel evaporate before
starting engine.
High Altitude
At altitudes over 5,000 feet (1524 meters), a minimum
85 octane / 85 AKI (89 RON) gasoline is acceptable. To
remain emissions compliant, high altitude adjustment is
required. Operation without this adjustment will cause
decreased performance, increased fuel consumption, and
increased emissions. See an authorized dealer for high
altitude adjustment information. Operation of the engine at
altitudes below 2,500 feet (762 meters) with the high altitude
kit is not recommended.
Install Pump Oil Breather Cap
1. Ensure compressor is resting on a flat, level surface.
2. Open drain valves (B) (rotate fully counterclockwise) to
release residual air pressure build-up in air tanks.
3. Remove shipping cap from pump and discard.
4. Install pump oil breather cap (C) into the oil fill (D).
5. Wipe up any spilled oil.
6. Close drain valves (rotate fully clockwise).
8 BRIGGSandSTRATTON.COM
B
WARNING
Compressed air stream from hose or tank drain
can cause soft tissue damage to exposed skin
and can propel objects leading to severe injury
and / or property damage.
• Always wear ANSI Z87.1 approved safety glasses with side
shields.
C
D
NOTICE
Serious damage may result if operating the unit with
insufficient oil. Check oil level daily or with each use.
• Damage to equipment resulting from failure to follow this
instruction will void warranty.
A