Draining Gasoline; Changing Crankcase Oil; Adjusting Throttle; Cleaning Cooling System - Toro ProLine 21 Recycler Series Operator's Manual

Draining Gasoline

1. Stop engine and wait for engine to cool. Pull
wire off spark plug.
Note: Drain gasoline from a cold engine
only.
2. Remove cap from fuel tank. Use a pump-type
syphon to drain fuel into clean gas can.
Note: This is the only procedure
recommended for draining fuel.

Changing Crankcase Oil

Change oil after the first 5 operating hours and then
after every 50 hours or every season. Change oil
while engine is warm.
Note: Change oil every 25 hours when
operating under heavy load or in high
temperatures.
1. Stop engine and wait for all moving parts to
stop. Pull wire off spark plug.
2. Remove grass bag. Drain gasoline from fuel
tank: refer to DRAINING GASOLINE section.
3. Remove dipstick from oil fill tube and place a
drain pan next to left side of mower.
4. Tip mower on its left side, allowing oil to drain
into drain pan (Fig. 16).
5. When oil is drained, return mower to upright
position and add fresh oil to engine. Refer to
OIL section in BEFORE STARTING chapter.

Adjusting Throttle

Throttle control adjustment may be required if engine
does not start. Whenever a new throttle control cable
is installed, throttle must be adjusted.
1. Stop engine and wait for all moving parts to
stop. Pull wire off spark plug.
2. Move throttle control to
3. Loosen cable clamp screw until throttle cable
slides (Fig. 17).
4. Move throttle cable left or right until holes in
throttle lever and throttle bracket align (Fig. 17).
5. Pull throttle cable slightly to remove any slack
and tighten cable clamp screw to lock
adjustment in place.

Cleaning Cooling System

After every 100 operating hours or every season,
clean dirt and chaff from cylinder, cylinder head fins
and from around carburetor and linkage. Also remove
debris from air intake slots on recoil housing. This
will ensure proper cooling and best engine
performance.

Adjusting Wheel Drive

(self-propelled model only)
If mower does not self-propel or self-propels when
control bar is more than 1-1/2 inches from the
handle, adjust wheel drive control knob on rear of
gear box.
1. Close door in mower housing and remove grass
bag.
2. ADJUSTMENT (Fig. 18)—Rotate control knob
clockwise 1/2 turn if mower does not self-propel.
If mower creeps forward, rotate knob 1/2 turn
counterclockwise to loosen belt.
3. CHECK ADJUSTMENT—Slowly pull mower
backward while control bar is gradually moved
toward handle. Adjustment is correct when rear
wheels stop turning and control bar is about
one inch from handle (Fig. 19).
(FAST position).
EN–12