Briggs & Stratton 21000 Series Operating & Maintenance Instructions page 5

Starting
This engine is shipped WITHOUT oiI. See section on oil
for recommendations, capacity, and filling details.
Full Choke
Half Choke
Off Position
CAUTION
Operating engine at an excessive speed without
proper engine loading will cause damage. DO NOT
operate a string trimmer with a line shorter than
10" diameter for extended periods.
Choke Lever
Primer Bulb
1. Set unit on flat surface and push primer bulb 15
times FOR A NEW ENGINE. Push primer bulb 8
times for all future starts.
2. Move red choke lever to the FULL CHOKE
position.
3. Not all applications have a throttle. If the
equipment has this a throttle, squeeze throttle
trigger. If the engine is still warm from a previous
start, do not squeeze throttle.
Typical
Trigger
4. Pull starter handle sharply until engine runs.
5. Wait a maximum of I0 seconds, then move choke
lever to HALF CHOKE position.
6. Run the engine at HALF CHOKE for 20 seconds
or until unit accelerates smoothly. Move choke to
OFF position.
7. Wait a minimum of 20 seconds, then release
throttle trigger.
WARNING
The manufacturer of the equipment on which
this engine is installed specifies top speed at
which the engine will be operated. DO NOT
EXCEED this speed.