Poulan S1634 LE, S1838 LE Air Filter, Cleaning the air filter, Carburetor Adjustment

AIR FILTER

CAUTION: Do not clean filter in gasoline or other flammable solvent to avoid creating a fire hazard or producing harmful evapora- tive emissions.

Cleaning the air filter:

A dirty air filter decreases engine perform- ance and increases fuel consumption and harmful emissions. Always clean after every 5 hours of operation.

1.Loosen 3 screws on cylinder cover.

2.Remove cylinder cover.

3.Remove air filter.

4.Clean the air filter using hot soapy water. Rinse with clean cool water. Air dry completely before reinstalling.

5.Lightly oil air filter before installing to im- prove the efficiency of air filter. Use 2--cycle engine oil or motor oil (SAE 30). Squeeze excess oil from filter.

6.Reinstall air filter.

7.Reinstall cylinder cover and 3 screws. TIghten securely.

Air Filter	Cylinder Cover
	Screws
	Cylinder
	Cover

2.Remove the bolt cover.

3.Loosen and remove the 2 muffler bolts. Remove the muffler, muffler gasket, out- let guide and backplate. Notice the ori- entation of these parts for reassembling.

4.Locate the 2 outlet cover screws on the muffler. Loosen and remove both screws.

5.Remove the outlet cover.

Outlet Cover	BACK VIEW OF
	MUFFLER
Screws	Muffler
Spark Arresting
Screen

6.Remove spark arresting screen.

7.Clean the spark arresting screen with a wire brush. Replace screen if any wires are broken or screen is blocked after clea- ning.

8.Reinstall spark arresting screen.

9.Reinstall outlet cover and 2 screws. En- sure outlet cover and both screws are reinstalled correctly (see illustrations) to prevent damage to the saw. The ex- haust outlet must face the chain brake (bar side) of the saw.

Exhaust

Outlet Cover

INSPECT MUFFLER AND SPARK ARRESTING SCREEN

WARNING: The muffler on this product contains chemicals known to the State of California to cause cancer.

As the unit is used, carbon deposits build up on the muffler and spark arresting screen, and must be removed to avoid creating a fire hazard or affecting engine performance.

Replace the spark arresting screen if breaks occur.

CLEANING THE SPARK ARREST- ING SCREEN

Cleaning is required every 25 hours of op- eration or annually, whichever comes first.

Outlet

Guide

	Muffler
Backplate	Muffler
	Bolts
	Muffler
	Gasket
	Bolt Cover Locknut

1.Loosen and remove the locknut from the bolt cover.

Outlet

Exhaust Outlet must face chain brake (bar side) of chain saw

10.Inspect the muffler gasket and replace if damaged.

11.Reinstall backplate, outlet guide, muffler gasket, and muffler using muffler bolts. Tighten until secure.

12.Reinstall bolt cover andlocknut. Tighten securely.

CARBURETOR ADJUSTMENT

WARNING: The chain will be mov- ing during most of this procedure. Wear your protective equipment and observe all safety precautions. The chain must not move at idle speed.

The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions:

SChain moves at idle. See IDLE SPEED--T adjusting procedure.

SSaw will not idle. See IDLE SPEED--T ad- justing procedure.

Idle Speed--T

Allow engine to idle. If the chain moves, idle is too fast. If the engine stalls, idle is too slow. Adjust speed until engine runs without chain movement (idle too fast) or stalling (idle too slow). The idle speed screw is located in the area above the primer bulb and is labeled T.

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