Bolens 520 - Manual (Page 9)

OPERATION (continued)
9. To clear snow from steps or to cut
down drifts, hold snow thrower by the
upper and lower handles and use a side-
to-side (swinging) motion.
10. Before storing unit, let engine run
a few minutes to keep ice from forming
on moving parts. Clear control panel of
snow and/or water to eliminate possible
freeze up of controls.
11. When storing unit, move vanes to
vertical position to prevent possible dis­
tortion of vanes.
TROUBLESHOOTING
Before you take your snow thrower in
for repairs, make sure you have followed
the instructions in this manual. Check to
see if the malfunction is something you
can correct yourself. The above table may
help you locate your problem.
PROBLEM CAUSE
1. Engine will turn over
but will not start
1. Ignition switch in “OFF" position.
2. Faulty or fouled spark plug.
3. Spark plug wire disconnected.
4. Empty fuel tank.
5. Incorrect choke setting.
2. Starts only after
repeated tries
1. Faulty or fouled spark plug.
2. Incorrect choke setting.
3. Idles rough 1. Faulty or fouled spark plug.
2. Incorrect choke setting.
4. Engine overheats 1. Dirty air screen (4 cycle engines).
2. Low oil level (4 cycle engines).
3. Spark plug loose.
4. Dirty cooling fins.
5. Improper fuel mix (2 cycle engines).
5. Impeller does not turn 1. Torn or worn belt.
2. Auger Clutch not engaged.
6. Electric start unit
will not crank the
engine
1. Extension cord not plugged in.
2. Fuse or circuit breaker for outlet blown.
3. Faulty extension cord or plug.
7. Snow Thrower will
not throw snow
1. Auger Clutch not engaged.
2. Worn impeller paddles.
3. Worn or torn drive belt.
8. Engine will not
stop with key off.
1. Faulty or disconnected ignition switch.
2. Lead wire broken.
CARE AND MAINTENANCE
Check and tighten (if necessary) all
nuts and bolts before using this
machine and periodically thereafter
(approx, every two (2) hours of
operation). Vibration and/or rough
handling may cause hardware to
loosen. Tighten as required.
Refer to Engine Manual for mainte­
nance procedures and requirements
not covered in this manual.
SPARK PLUG
Clean and regap spark plug as
necessary, Figure 10. 2 CYCLE
ENGINE: .035" (0.9mm) - 4 CYCLE
ENGINE: .030" (0.76mm). Refer to
Engine Manual for cleaning proce­
dure and replacement. When
removing plug for maintenance be
sure to clean area around spark
plug to prevent dirt from entering
engine. The spark plug is located
under the upper cover.
A dirty, oily or carboned spark plug
makes starting difficult and causes
inefficient operation.
ENGINE CRANKCASE
MODELS 225, 225E, 300 & 300E
2 CYCLE ENGINE - Proper engine
lubrication is provided by adding
the correct pre-mixed fuel to
gasoline tank. See page 7.
FEELER GAUGE
COMPLIANCE WITH RADIO INTER­
FERENCE REGULATIONS CER­
TIFIED. REPLACE SPARK PLUG
WITH RESISTOR SPARK PLUG
ONLY.
Fig. 10
MODELS 350,350E, 500, 500E & 520
4 CYCLE ENGINE - Change oil
after first 2 hours of operation and
every 25 hours thereafter. Check oil
level every 5 operating hours. Posi­
tion snow thrower in its normal