GB–23
adjust carburetor to a slightly richer mixture.
Also, if engine falters under load, open power
adjusting screw 1/8 turn counterclockwise.
12. After carburetor is adjusted, shut engine off
before replacing carburetor heater box.
13. Reinstall choke knob on mounting pin.
Replacing
Spark Plug
Use a Champion RJ-19LM spark plug or equivalent.
Set air gap at 0.030” (0.76 mm). Since air gap
between center and side electrodes of the spark plug
increases gradually during normal engine operation,
install a new plug after every 25 hours of engine
operation.
1. Clean area around spark plug so foreign matter
cannot fall into cylinder when plug is removed.
2. Pull wire off spark plug (Fig. 33) and remove
plug from cylinder head.
IMPORTANT: A cracked, fouled or dirty
spark plug must be replaced. Do not sand
blast, scrape or clean electrodes because grit
may eventually r
elease fr
om the plug and fall
into the cylinder. The result will likely be
engine damage.
3. Set air gap between electrodes of new spark plug
at 0.030” (0.76 mm) (Fig. 34). Next, install
spark plug in cylinder head. Tighten plug to 15
ft-lb (20.4 Nm).
4. Push the wire onto the spark plug.
Storage
1. FUEL SYSTEM PREPARATION–
• Add Toro Stabilizer/Conditioner to the fuel tank
(one ounce per gallon of fuel).
• Run engine for five minutes to distribute
conditioned fuel through fuel system.
• Stop engine, allow it to cool, and drain fuel tank
or run engine until it stops.
• Restart the engine again and run it until it stops.
• Either choke or prime the engine, restart it a
third time and run engine until it will not restart.
• Dispose of fuel properly. Recycle per local
codes.
• DO NOT store ST
ABILIZED gasoline over 90
days.
2. Remove spark plug from cylinder head. Next,
pour two teaspoons of engine oil into spark plug
hole in cylinder head. Install spark plug in
cylinder head, but do not install wire on the
plug. Then pull recoil starter slowly to distribute
oil on inside of cylinder.
3. Lubricate the snowthrower: refer to Lubricating
Snowthrower, page 19. Change crankcase oil:
see Changing Crankcase Oil, page 19.
4. Clean the snowthrower. Touch up chipped
surfaces with paint. Toro Re-Kote paint is
available from an Authorized TORO Service
Dealer. Sand affected areas before painting, and
use a rust preventative to prevent metal parts
from rusting.
5. Tighten all screws and nuts. If any part is
damaged, repair or replace it.
6. Store snowthrower in a clean, dry place, and
cover it for protection.
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