d. Coat exposed polished or machined metal sur-
e. Service the engine air cleaner more frequently
faces with a suitable rustproof material after first
removing any accumulation of rust.
Operation in Salt Water Areas
Operation at High Altitudes
a. Wipe the unit dry at frequent intervals, with
ciently at elevations up to 5,000 feet. There will be a
b. If the unit becomes encrusted with salt, wash
it with fresh water, taking care not to damage the
reduction in efficiency because of the rarified air at
this level. This is a normal condition that cannot be
electrical system with water.
c. Make sure all surfaces requiring lubrication
are clean and dry before applying lubricant. Lubri-