Inspect cooling fins to ensure they are clean and free of dirt that inhibits cooling.
Check the air cleaner restriction indicator frequently. If the red band appears in window of restriction
indicator, change air cleaner element.
2-14. OPERATION IN HIGH ALTITUDES
Peak efficiency of the engine is reduced at higher altitudes. Be sure engine is operating at peak effi-
Observe normal operation.
OPERATION IN SANDY OR DUSTY AREAS
Monitor the air cleaner intake restriction more closely. If the air cleaner restriction indicator shows its
red band, replace air cleaner element.
Make sure oil level is maintained at the top mark.
Change engine oil after Initial 20 hours of operation or at
end of first month. Thereafter, every three months or 100
During the handling of fuel, PMCS, and refueling, be sure that sand or dust is not allowed to enter fuel
or lubrication system.
If centrifugal pump unit is not in use and suction and/or discharge hoses are not installed, be sure that
suction (intake) flange and discharge ports are covered.
With engine stopped, inspect frequently to be sure that cylinder cooling fins are clean and free of dirt
that inhibits cooling.
2-16. OPERATION UNDER RAINY OR HUMID CONDITIONS
Keep fuel tank cap secured. Immediately close the operators lid. During handling of fuel, PMCS, and
refueling, be sure that water is not allowed to enter fuel or lubrication system.
Take special care to prevent rust and corrosion. If surfaces become rusty or corroded, remove corro-
sion, then reprime and paint as necessary.
Fuel version must be grounded with appropriate hardware.
APPLICATION OF CARC PAINT
An approved or accepted pressure demand or continuous flow, type
C, full-facepiece hood or helmet supplied air respirator must be
worn when CARC painting. The local safety office, Preventive Medi-
cal Activity, and local medical support facility must be consulted
prior to initiating CARC painting.