Flushing And Cleaning; Pressure Cap; Ignition System - Kohler 15RYG Operation

6. Remove the radiator's pressure cap.
7. Add coolant to the radiator to just below the
overflow tube on the filler neck. See Section 1,
Service Views, for the overflow tube location.
8. Replace the radiator's pressure cap.
9. Maintain the coolant level in the coolant overflow
bottle between the High and Low markings. See
Section 1, Service Views, for the coolant overflow
bottle location.
Note: Periodically check the coolant level by
removing the radiator's pressure cap. Do
not rely solely on the level in the coolant
overflow bottle. Add fresh coolant until the
level is just below the overflow tube opening.
3.8.4

Flushing and Cleaning

For optimum protection, drain, flush, and refill the
cooling system at the interval listed in the service
schedule.
Flushing and Cleaning Procedure
1. Remove the pressure cap and open the radiator's
coolant drain valve and let the system drain
completely. Remove the pressure cap to simplify
draining.
2. Drain, clean, and flush the coolant overflow bottle.
3. Flush the system with clean water.
4. Close the radiator's coolant drain valve.
5. Fill the system with the recommended coolant.
6. Replace the pressure cap.
TP-6197 3/06
3.8.5

Pressure Cap

The cooling system utilize a pressure cap to raise the
boiling point of the coolant, enabling higher operating
temperatures. If the cap leaks, replace it with a cap of the
same rating. Find the pressure cap rating in Figure 3-9.
Item
Pressure Cap
Thermostat
Figure 3-9 Pressure Cap and Thermostat Rating

3.9 Ignition System

Service the spark plugs at the interval specified in the
service schedule using the following procedure.
Spark Plug Service Procedure
1. Remove spark plug wires by grasping the spark
plug boot and turning slightly while pulling. Do not
pull the wire. Pulling on the wire rather than the
boot may damage the wire or terminal.
2. Loosen the spark plug with a ratchet and 5/8-in.
spark plug socket with a rubber insert to prevent
spark plug damage.
3. Use compressed air to remove dirt from around
each spark plug to prevent dirt particles from falling
into the combustion chamber.
Section 3 Scheduled Maintenance
Rating
97 kPa (14 psi)
91_C (195_F)
27