Troy-Bilt 12157 - Manual (Page 17)

6. Apply grease until it begins to come out of the
bottom hole. Replace the bottom plug securely.
Then apply grease to the top plug hole. Add
until it begins to come out of the middle hole.
Reinstall the plugs in the middle and top holes.
7.
Reinstall the right-side tines. Before rein­
stalling the tines, use a fine grade of sandpaper
to clean any rust off the tine shaft. Then coat the
tine shaft with a few drops of oil or anti-seize
compound to make future tine removal easier.
ENGINE AIR CLEANER
A
WARNING
The temperature of the muffler and adjacent
areas on the engine may exceed 150°F
(650C). Avoid these areas during mainte­
nance. Disconnect the spark plug wire and
keep it away from the spark plug prior to
any maintenance.
Service the air filters every three (3) months or
every 25 operating hours. Service daily if used
in extremely dusty conditions. The filter assem­
bly has one thin flocked filter and one thick foam
filter.
IMPORTANT: Never run engine without air filter
assembly properly installed.
To Remove and Inspect Air Filter Assembly:
1. Loosen both cover screws and remove cover
(A, Figure 13) and screws.
2. Remove the outer, flocked filter (B).
3. Remove the thick foam filter (C).
4. Inspect the filters for discoloration or dirt accu­
mulation. If either is present, service the filters.
5. Thoroughly clean inside of cover and body.
To Service Thick Foam Filter:
1. Wash in a water and detergent solution and
squeeze (do not twist) until all dirt is removed.
2. Rinse thoroughly in clear water. Then, wrap in
a clean cloth and squeeze until dry.
3. Saturate with motor oil and squeeze (do not
twist) to distribute oil and remove excess oil.
To Service Thin Flocked Filter:
1. Wash filter in a water and detergent solution.
2. Rinse thoroughly in clear water, then air dry.
3. Reassemble filter as shown in Figure 13. Do
not overtighten cover screws.
CARBURETOR ADJUSTMENT
A
WARNING
The temperature of the muffler and adjacent
areas on the engine may exceed 150OF
(650C). Avoid these areas during mainte­
nance. Remove the spark plug lead and
ground the lead to the engine to prevent ac­
cidental starts and fires. Failure to do this
could cause bodily harm.
Figure 13: The air cleaner assembly.
IMPORTANT: Never tamper with the engine gov­
ernor which is factory-set for the proper engine
speed. Overspeeding the engine above the fac­
tory high-speed setting can be dangerous.
Carburetor Adjustment If Engine Runs Pooriy
If the engine is running poorly or has low
power under tilling conditions, an idle mixture
screw adjustment to the carburetor may solve
the problem. However, first inspect and service
the spark plug and the air filter before making a
carburetor adjustment. If the engine continues
to run poorly (and the fuel mixture is fresh), pro­
ceed to the carburetor adjustment instructions
below.
This factory-engineered instruction has been
designed to provide continued optimum engine
operating performance after the engine break-in
period, which is usually 5 to 10 hours. The ad­
justment, when properly performed as described
below, will not void the engine warranty. All that
is needed is a common screwdriver. If you pre­
fer, contact an authorized Tecumseh Service
Dealer for a carburetor adjustment.
Prior to Carburetor Adjustment:
1. Let the engine cool for 30 minutes before con­
tinuing.
2. From the operator’s position behind the han­
dlebars, lay the machine down on its left side
(muffler side).
Carburetor Adjustment:
1. Locate the carburetor idle mixture screw (see
Figure 14). It is directly under the air filter and is
black.
DO NOT ADJUST THE SILVER-
COLORED SCREW.
2. Turn the idle mixture screw 1/16 of a turn
clockwise.
17