Cleaning the Spark ARREST- ING Screen

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

1.Loosen and remove the nut from the ex- haust outlet cover.

2.Remove the exhaust oulet cover.

3.Remove spark arresting screen. Handle screen carefully to prevent damage.

4.Clean the spark arresting screen gently with a wire brush. Replace screen if breaks are found.

5.Replace any broken or cracked muffler parts.

6.Reinstall spark arresting screen, exhaust outlet cover, and nut. Tighten nut securely.

REPLACE SPARK PLUG

The spark plug should be replaced each year to ensure the engine starts easier and runs better. Ignition timing is fixed and non- adjustable.

1.Loosen 3 screws on cylinder cover.

2.Remove the cylinder cover.

3.Pull off the spark plug boot.

4.Remove spark plug from cylinder and discard.

5.Replace with Champion RCJ--7Y spark plug and tighten securely with a 3/4 inch (19 mm) socket wrench. Spark plug gap should be 0.025 inch (0,6 mm).

6.Reinstall the spark plug boot.

7.Reinstall the cylinder cover and 3 screws. Tighten securely.

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

Conditions which indicate the need for chain sharpening:

SReduction in size of wood chips. The size of the wood chip will decrease as the chain gets duller until it becomes more like a powder than a chip. Note that dead or

rotted wood will not produce a good chip.

SSaw cuts to one side or at an angle. S Saw has to be forced through the cut.

Tools required:

S5/32 inch (4 mm) diameter round file and

file holder

SFlat file

SDepth gauge tool

TO SHARPEN CHAIN:

1.Move ON/STOP switch to the STOP position.

2.Check chain for proper tension. Adjust chain tension if necessary. See CHAIN TENSION section.

3.Sharpen cutters.

S To sharpen the cutters, position the file holder level (90˚) so that it rests on the top edges of the cutter and depth gauge.

NOTE: The chain has both left and right hand cutters.

File Holder

File

Cylinder

Cover

Cutter

90˚

Spark

Plug Boot

Spark

Plug

REPLACE FUEL FILTER

To replace fuel filter, drain your unit by run- ning it dry of fuel. Remove fuel cap and its connected retainer from tank. Pull filter from tank and remove from line. Replace and re- assemble.

CHAIN ADJUSTMENT

See CHAIN TENSION in ASSEMBLY section.

CHAIN SHARPENING

WARNING: Improper chain sharp- ening techniques and/or depth gauge mainte- nance will increase the chance of kickback which can result in serious injury.

Depth Gauge

SAlign the 30˚ file holder marks paral- lel with the bar and to the center of the chain.

Cutter

30˚	Cutter
File Holder Line

SSharpen cutters on one side of the chain first. File from the inside of each cutter to the outside. Then, turn the chain saw around and repeat the pro-

cess for the other side of the chain.

SFile on the forward stroke only. Use 2 or 3 strokes per cutting edge.

SKeep all cutters the same length when filing.

SFile enough to remove any damage to cutting edges (side plate and top plate of cutter).

All Cutters	Remove Damage
Same Length
	Top Plate
	Side Plate