Carburetor Adjustments; Storage - Toro ProLine 21 Recycler Manual Del Operador

6. Restart mower and let it run for a few minutes to
dry out moisture on the mower and its
components.
Scraping Method
If washing does not remove all debris from under
deck, tip mower and scrape it clean.
1. Pull wire off spark plug.
2. Drain gasoline from fuel tank: refer to
DRAINING GASOLINE section.
3. Tip mower on its right side (Fig. 29).
4. Remove dirt and grass clippings with a
hardwood scraper. Avoid burrs and sharp edges.
5. Turn mower upright.
6. Refill gas tank.
7. Reconnect spark plug wire.
Belt Cover (self-propelled model only)
Keep area under belt cover free of debris.
1. Remove bolts securing belt cover (Fig. 24) to
mower housing. Lift off cover and brush out all
debris from belt area. Reinstall belt cover.

Carburetor Adjustments

The carburetor on this engine is low emission. It is
equipped with an idle mixture valve with a limiter
(Fig. 30), which allows some adjustment, and an idle
speed adjustment screw.
Adjustments
DO NOT ADJUST TOP SPEED SCREW.
It is pre-set at factory.
1. Start engine and warm up approximately 5
minutes before adjusting.
2. With engine running, place throttle control in
SLOW position.
3. Rotate carburetor throttle lever against the idle
speed screw and hold it.
4. Turn idle speed screw to obtain 1750 rpm.
5. Rotate idle mixture valve full travel clockwise
and then counterclockwise.
6. Finally, position idle mixture valve in middle of
travel.
7. Check idle speed and re-adjust to 1750 rpm, if
necessary.
8. Move throttle control to
Engine should accelerate smoothly. If it does
not, adjust idle mixture valve counterclockwise
1/8 turn.

Storage

1. For long term storage, either drain gasoline from
fuel tank or add a fuel stabilizer to the gasoline.
To drain gasoline, refer to DRAINING
GASOLINE section. After fuel is drained, start
engine and let it idle until all fuel is consumed
and engine stops. Repeat the starting procedure
two more times to ensure all gas is removed
from the engine. If gasoline is not drained,
gum-like varnish deposits will form and cause
poor engine operation, even starting problems.
Note: If engine is operating on oxygenated or
reformulated gasoline (gasoline
blended with an alcohol or an ether),
remove all fuel from tank and run
engine until it stops from lack of fuel
before storing.
Fuel can be left in gas tank only if a fuel
additive, such as Toro's Stabilizer/Conditioner, is
added to gasoline and run through engine before
storing. Toro's Stabilizer/Conditioner is a
petroleum distillate based conditioner/stabilizer.
Toro does not recommend stabilizers with an
alcohol base, such as ethanol, methanol or
isopropyl. Use fuel additive in recommended
quantities as specified on container.
FAST position.
EN–16