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OM-492 Page 40
SECTION 9 – RUN-IN PROCEDURE
run_in4 6/99
9-1. Wetstacking
1 Welding Generator
Run diesel engines near rated out-
put during run-in period to properly
seat piston rings and prevent wets-
tacking. See nameplate or rating
label to find rated output.
. Do not idle engine longer than
necessary. Piston rings seat
faster if engine runs at weld/
power rpm, and the welding
generator is kept loaded during
run-in.
2 Engine Exhaust Pipe
Wetstacking is unburned fuel and
oil in the exhaust pipe and occurs
during run-in if the engine is run too
long at light load or idle rpm.
If exhaust pipe is coated with a wet,
black, tar-like substance, dry the
engine using one of the following
run-in procedures.
See the engine manual for addition-
al engine run-in information.
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