Replacing Spark Plug; Storage - Toro 38590 Operator's Manual

the snowthrower is tipped, drain all gasoline
from fuel tank. Refer to Draining Gasoline,
page 16.
3. Check deflection of chain by lifting up on chain
with moderate pressure at mid span. There
should be 1/8-3/8" deflection (Fig. 30). If
deflection is not as specified, an adjustment is
required.
4. Loosen (4) flange head capscrews (2 each side)
securing transmission frame to engine frame
(Fig. 32).
5. Pivot rear of transmission frame until 1/8-3/8"
chain deflection is attained. Retighten flange
head capscrews.
6. Recheck chain deflection.
IMPORTANT: Excessive chain tension may
cause transmission damage.
7. Chain adjustment will affect gearshift lever
alignment. If gear shift lever is not aligned with
Power Shift slot in control panel (Fig. 5, inset),
shift rod length must be adjusted as follows:
A. Disconnect ball joint from transmission
lever and loosen jam nut.
B. Rotate ball joint up or down until gear shift
lever is aligned with Power Shift slot.
C. Reinstall ball joint to transmission lever and
tighten jam nut.

Replacing Spark Plug

Check spark plug yearly or every 100 operating
hours. If electrodes in center of plug are dark or have
deteriorated, install a new plug. Use a Champion
RL-86C spark plug or equivalent. Set air gap at
0.030" (0.76 mm).
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.
19
IMPORTANT: A cracked, fouled or dirty
spark plug must be replaced. Do not sand
blast, scrape or clean electrodes because grit
may eventually release from 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 N m).
4. Push the wire onto the spark plug.

Storage

1. FUEL SYSTEM PREPARATION–
Note: A fuel stabilizer/conditioner is most
effective when mixed with fresh
gasoline.
Add Toro Stabilizer/Conditioner to the fuel tank
(one ounce per gallon of fuel).
Run engine for ten minutes to distribute
conditioned fuel through fuel system.
Stop engine, allow it to cool, and drain fuel tank.
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 STABILIZED 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.