Poulan SM446E instruction manual Service and Adjustments

CLEAN 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.Clean the cover and the area around it to keep dirt from falling into the carburetor chamber when the cover is removed.

2.Remove parts by pressing button to re-

lease air filter cover.

NOTE: To avoid creating a fire hazard or producing harmful evaporative emissions, do not clean filter in gasoline or other flammable solvent.

3.Wash the filter in soap and water.

4.Allow filter to dry.

5.Replace parts.

Button

Air Filter

Air Filter Cover

BAR MAINTENANCE

If your pruner cuts to one side, has to be forced through the cut, or been run with an im- proper amount of bar lubrication it may be necessary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, ensure ON/OFF switch is in the OFF position, then clean all sawdust from the guide bar and sprocket hole.

To maintain guide bar:

SMove ON/OFF switch to the OFF position and disconnect spark plug.

S Loosen and remove bar clamp nut and chain brake. Remove bar and chain from pruner.

S Clean the oil holes and bar groove after each 5 hours of operation.

Remove Sawdust From

Guide Bar Groove

Oil Holes

S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file.

SWhen rail top is uneven, use a flat file to restore square edges and sides.

File Rail Edges

and Sides

Square

Worn Groove Correct Groove

Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your pruner in the repair parts list.

LUBRICATION

Bar Oil

Fill Cap

SSee GUIDE BAR AND CHAIN OIL under the OPERATION section.

MUFFLER AND SPARK ARREST- ING SCREEN

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

As your unit is used, carbon deposits build up on the muffler and spark arresting screen. For normal homeowner use, however, the muffler and spark arresting screen will not re- quire any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by your authorized service dealer.

REPLACE SPARK PLUG

Replace the spark plug each year to ensure the engine starts easier and runs better. In- spect spark plug every 25 hours of usage. Clean and/or replace as necessary. Set spark plug gap at 0.025 inch (0.6 mm). Ignition tim- ing is fixed and nonadjustable.

1.Twist, then pull off spark plug boot.

2.Remove spark plug from cylinder and discard.

3.Replace with Champion RCJ-6Y spark plug and tighten securely with a 3/4 inch (19 mm) socket wrench.

4.Reinstall the spark plug boot.

SERVICE AND ADJUSTMENTS

WARNING: Disconnect the spark plug before performing maintenance, service, or adjustments except for carburetor adjustments.

CHAIN SHARPENING

Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener.

CHAIN REPLACEMENT

WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving.

It is normal for a new chain to stretch during the first 15 minutes of operation. You should re- check your chain tension frequently and adjust the chain tension as required. See CHAIN TEN- SION section.

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