Service Manual

CHANGING OIL
Change oil after the first
2 hours of use and
every 25 hours thereafter. Run the engine to
1. Stop the engine and pull the high tension
wire off the spark plug.
2. Drain gasoline from the fuel tank. Refer
to
Fuel System on page 8.
3. Raise the left side of the mower at least 12
inches and remove the drain plug. Use a 12
mm socket or wrench.
4. Insert an oil drain tube, part number 56-
6680, over the drain opening and lower the
mower. Raise the right side of the mower
until all the oil has flowed into a drain pan.
See Fig. 2-4.
warm the oil before draining.
I
01 L
DRAIN
I TUBE I
Figure 2-4
5. Install the drain plug and fill the crankcase
with .53 liters (18 oz) of SAE
30 weight oil.
SAE 10W30 is an acceptable substitute.
Make sure the oil has a service classification
of MS, SC, SD, SE or SF. Do not overfill the
engine with oil.
6. Check the dipstick to make sure the oil level
is between the full and add mark. See Fig.
2-5.
Figure 2-5
SPARK PLUG
Remove the spark plug after every
25 operating
hours and check its condition. Use an NGK
BPR6ES spark plug or its equivalent. The air
gap is ,813 mm (.032 in.).
1. Stop the engine and remove the spark plug
wire.
2. Clean the area around the spark plug and
remove the plug.
3. Replace a cracked, fouled or dirty spark
plug.
Do not sandblast, scrape or clean
electrodes because engine damage could
result from grit entering the cylinder.
4. Set the air gap to .813 mm (.032 in.). See Fig.
2-6. Install the plug and tighten it to
2 Kg-m
(1 5 ft-l bs).
0.032"
(0.813 mm)
Figure 2-6
VALVE LASH
Valve lash is preset at the factory to
.025 .13
mm (.001 in.
.005 in.). There is no regular
maintenance or adjustment of the valve lash
required unless the head has been removed or
other service in the valve train has been
performed. See Valve Lash Adjustment on page
33 for complete valve setting instructions.
GOVERNOR AND THROTTLE LINKAGE
The governor is set to operate the engine at
3000 RPM. To adjust the governor:
1. Loosen the governor arm locknut.
2. Turn the governor shaft fully clockwise.
3. Move the governor arm fully to the right.
4. Tighten the governor arm locknut.
See Fig. 2-7. It is not necessary to remove the
oil
fill tube to make this adjustment.
The engine should operate at 3000 RPM when
set on fast. To adjust the throttle:
1. Stop the engine and remove the spark plug
2. Loosen throttle cable clamp.
wire.
7