Troy-Bilt 665B, 664D Engine Cleaning, Engine OIL Service, AIR Cleaner Service, Spark Plug Service

Section 5: Maintenance 19

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove the key from the keyswitch on units so equipped.

Failure to follow these instructions can result in serious personal injury or property damage.

5.On engines with a dipstick, remove it, wipe it clean, and reinstall it finger-tight. Remove the dipstick and check the reading. Add oil (if required) to bring the level to the FULL mark. Do not overfill.

B. To Change the Engine Oil:

Change the engine oil as instructed in the separate Engine Owner’s Manual.

ENGINE CLEANING

The engine must be kept clean to assure smooth operation and to prevent damage from overheating. Refer to the separate Engine Owner’s Manual for specific repair and cleaning instructions. All inspections and services must be done with the engine shut off and cool to the touch.

Figure 5-3: Remove drain plug to drain transmission gear oil (also remove oil fill plug and oil level check plug).

ENGINE OIL SERVICE

Check the engine oil level before starting the engine each day and check it after each 5 hours of continuous operation. Running the engine when it is low on oil will quickly ruin the engine.

It is recommended that you change the motor oil after every 10 hours of opera- tion and even sooner when operating in extremely dirty or dusty conditions. Refer to the separate Engine Owner’s Manual for detailed service instructions.

A. To Check the Engine Oil Level:

1.Move the tiller to a level area and shut off the engine.

2.Level the engine by moving the Depth Regulator Lever up or down as needed.

3.Clean the area around the oil dipstick or oil fill tube to prevent dirt from falling into the crankcase.

4.On engines with an oil fill tube, remove the filler cap, add oil (if required) until it reaches the top of the tube and reinstall the filler cap.

AIR CLEANER SERVICE

The engine air cleaner filters dirt and dust out of the air before it enters the carbure- tor. Operating the engine with a dirty, clogged air filter can cause poor perfor- mance and damage to the engine. Never operate the engine without the air cleaner installed. Inspect and service the air cleaner more often if operating in very dusty or dirty conditions.

Service the air cleaner as instructed in the separate Engine Owner’s Manual.

SPARK PLUG SERVICE

Inspect and clean or replace the spark plug after every 100 operating hours or annually. Clean the plug and set the gap as described in the separate Engine Owner’s Manual.

In some areas, local law requires using resistor spark plugs to suppress ignition signals. If the engine was originally equipped with a resistor spark plug, use the same type for replacement.

SPARK ARRESTER SCREEN SERVICE

If the engine muffler is equipped with a spark arrester screen, remove and clean it according to the time intervals and instructions in the separate Engine Owner’s Manual.

CARBURETOR/GOVERNOR

CONTROL ADJUSTMENTS

WARNING

Operators shall not tamper with the engine governor settings on the machine; the governor controls the maximum safe operating speed to protect the engine and all moving parts from damage caused by overspeed. Authorized service shall be sought if a problem exists.

The carburetor was adjusted at the factory for best operating speed. Refer to the separate Engine Owner’s Manual for any adjustment information or see your authorized engine service dealer.

The governor controls the maximum safe operating speed and protects the engine and all moving parts from damage caused by overspeeding. Do not tamper with the engine governor settings. Seek autho- rized service if a problem exists.

THROTTLE CONTROL ADJUSTMENT

If the engine does not respond to various throttle lever settings, refer to the sepa- rate Engine Owner’s Manual for service information or contact your local autho- rized engine service dealer.