Yard Machines 340 Thru 390 Lubrication, Maintenance, Carburetor Adjustment, Trouble Shooting

Belt

Cover

Figure 18

4. Lift the belt off the transmission pulley.

5. Remove the hex nut which secures the reverse idler pulley to the idler bracket. Slide idler pulley out and remove the belt. (See Figure 19.)

Hex Nut and Washer

CARBURETOR ADJUSTMENT

WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), disengage all clutches and tines. Keep clear of all moving parts. Be careful of heated surfaces and muffler.

Minor carburetor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. If adjustments are needed, refer to the engine manual packed with the tiller.

NOTE: A dirty air cleaner will cause engine to run rough. Be certain air cleaner is clean and attached to the carburetor before adjusting carburetor. Do not make unnecessary adjustments. Factory settings are satisfactory for most applications and conditions.

IMPORTANT: Never run your engine without air cleaner completely assembled.

The spark plug should be cleaned and the gap reset once a season. Spark plug replacement is recommended at the start of each tilling season; check engine manual for correct plug type and gap specifications.

Clean the engine regularly with a cloth or brush.

Keep the cooling system (blower housing area) clean to permit proper air circulation which is essential to engine performance and life. Be certain to remove all dirt and combustible debris from muffler area.

CLEANING THE TINE AREA

Clean the underside of the tine shield after each use. The dirt washes off the tines easier if washed off immediately instead of after it dries.

SECTION 9: LUBRICATION

WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or doing any kind of work on tiller.

Pivot Points-Remove the belt cover and lubricate all moving parts and pivot points at least once a season using SAE 30 engine oil.

Chain Drive-The chain case is pre-lubricated and sealed at the factory.

SECTION 10: MAINTENANCE

WARNING: Disconnect spark plug wire and ground it against the engine before performing any repairs or maintenance.

BELT REMOVAL AND REPLACEMENT

Your tiller has been engineered with belts made of special material (Kevlar Tensile). They should not be replaced with an off-the-shelf belt. If belt replacement is required, order belt or belts by part number from your nearest authorized service dealer.

Forward Drive Belt - Part No. 754-0428Reverse Drive Belt (390 Only) - Part No. 754-0429

Reverse Drive Belt (Model 390 Only)

1.Disconnect and ground the spark plug wire against the engine. Remove the belt cover from the left side of the tiller as follows.

2.Remove two self-tapping screws and flat washers from the front of belt cover. (See Figure 18.)

3.Remove the hex stop nut and flat washer from the side of the belt cover. Remove belt cover.

Self-Tapping

Screws

TROUBLE SHOOTING

Refer to page 13 of this manual for trouble shooting information.

ENGINE

Refer to the separate engine manual for all engine maintenance instructions.

Maintain engine oil as instructed in the separate engine manual packed with your unit. Read and follow instructions carefully.

Service air cleaner every 25 hours under normal conditions. Clean every few hours under extremely dusty conditions. Poor engine performance and flooding usually indicates that the air cleaner should be serviced. To service the air cleaner, refer to the separate engine manual packed with your unit.

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