Exhaust system, Cleaning the engine, General torque specifications – Cub Cadet MTD P90 Series User Manual
Page 20: P90 series vertical shaft engines
P90 Series Vertical Shaft Engines
14
Exhaust system
The exhaust system is a frequently overlooked component of an engine. It is important to make sure the muffler is in
good condition and free of blockage.
NOTE: A blocked muffler will result in poor performance. If a muffler is completely blocked, the engine may not
start.
Cleaning the engine
1.
To maintain a proper operating temperature and to keep the equipment looking good, all debris should be
removed from the engine.
2.
It is recommended to use compressed air to blow all of the debris off of the engine.
NOTE: A pressure washer may be used to clean outdoor power equipment but only after the unit has been
allowed to properly cool.
General torque specifications
Useful Engine Specifications
Description
SAE
Metric
Engine displacement
25.6 cubic inch
420 cc
Spark plug gap
0.024” - 0.031”
0.6 - 0.8 mm
Spark plug torque
177 - 221 in lbs
20 - 25 Nm
Ignition module air gap
0.016” - 0.024”
0.4 - 0.6 mm
Intake valve lash
0.004” - 0.006”
0.10 - 0.15 mm
Exhaust valve lash
0.006” - 0.008”
0.15 - 0.20 mm
Oil capacity
57 oz
1.7 L
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