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181-1272-14 Four-Cycle Engine • Vertical Crankshaft • Air-Cooled Page 9
III. Primer Bulb and Choke
In Temperatures Above 40°F (5°C):
Follow instructions in Section A.I. See "I. Primer Bulb Only"
instructions on page 7. Afterward, continue reading
instructions below.
In Temperatures Below 40°F (5°C):
1. To avoid carbon monoxide poisoning, be sure engine is
outdoors in a well-ventilated area.
2. Move engine throttle control to “CHOKE” or “START”
position, if present (see equipment manufacturer’s
instructions). See Figures 15 thru 17.
3. When starting a cold engine, press primer bulb firmly 3
times, allowing primer bulb to return completely to
original position between pushes. See Figure 18.
NOTES
Be sure to cover vent hole when pressing primer bulb.
Cooler temperatures may require pushing primer bulb firmly
5 times.
DO NOT use primer to restart a warm engine after a short
shutdown. Doing so will flood the engine and may result in
equipment malfunction.
4. Operate equipment control to release engine brake or
clutch, if present (see equipment manufacturer’s
instructions). See Figure 15.
NOTE
DO NOT operate an electric starter for more than 5 seconds
each attempt.
5. Push starter button or turn ignition switch key to start
engine.
6. When engine starts:
a. Release starter button or ignition switch key.
b. Momentarily move engine throttle control to “FAST”
position. See Figures 15 thru 17.
c. Next, move engine throttle control to desired speed
in “RUN” range.
NOTES
If engine starts but falters when engine throttle control is
moved to “FAST” position:
a. Momentarily move engine throttle control back to
“CHOKE” position.
b. Next, move engine throttle control to “FAST”
position.
If engine dies after engine throttle control is moved to
“FAST” position, repeat steps 2 thru 6 to restart engine.
Figure 15. Typical Engine Controls
Figure 16. Typical Engine Symbols
Figure 17. Start/Choke Control Positions
Figure 18. Pressing Primer Bulb
1. Electric Start Switch
2. Engine Throttle Control
3. Equipment Control
1
3
2
STOP
STOP SLOW RUN FAST CHOKE PRIMER
1. “SLOW” Position
2. “RUN” Range
3. “FAST” Position
4. “CHOKE” Position
4
3
2
1
1. Primer Bulb
2. Vent Hole
1
2