10
Cooling System Maintenance and Service
Important service notes:
• Do not operate the engine without coolant in
system.
• Do not remove the radiator cap when hot. Engine
coolant is hot and under pressure and can cause
severe burns.
• To prevent engine overheating and damage, use
the recommended anti-freeze mixture in the
cooling system.
• To prevent engine damage, do not pour cold water
into a hot engine.
• To prevent engine damage, do not use anti-freeze
with stop-leak additive(s) or put other additives in
the cooling systems.
• Cooling system capacity is approximately 1.4 L
(1.47 qt.).
Maintenance
This engine is liquid-cooled, circulating a mixture of
ethylene glycol and water for dependable operation. A
pump is used to circulate the coolant through the
system and radiator. A thermostat contained in the
system assures automatic temperature control and
rapid warm-up. Correct coolant level and cleaning any
debris accumulation from the inlet screen and radiator
surfaces are critical to insuring long life, proper system
performance, and preventing overheating. Check the
coolant level in the overflow reservoir, and clean away
any debris accumulation daily or before each use. At
the same time, inspect the hoses and all connections
for signs of leakage.
Servicing
Engine coolant should be changed every 2 years or
every 1000 hours, whichever comes first. When
changing the engine coolant, the system should also
be flushed to remove any contaminants left behind
during draining. Following are recommended
procedures for checking, draining, flushing, and filling
the cooling system.
Checking Coolant Level
The coolant level should be checked at the overflow
reservoir, located under the upper blower housing
assembly.
1. Unhook the retaining straps and remove the upper
blower housing and screen assembly. See Figures
8 and 9.
Figure 8. Unhooking Retaining Straps.
Figure 9. Removing Upper Blower Housing and
Screen Assembly.
2. Check the coolant level within the overflow
reservoir. Coolant level should be between the
‘‘Max. Level’’ and ‘‘Min. Level’’ marks on the
reservoir. See Figure 10. Do not operate the
engine with the coolant level below the ‘‘Min.
Level’’ mark.
Add coolant to the overflow reservoir as required.
Use equal parts of ethylene glycol and water only
(distilled or deionized water is recommended).
Figure 10. Coolant Levels on Reservoir.
