Cub Cadet MTD 90 Series - Manual (Page 19)

Introduction
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13. Double-check the clearance after tightening the jam nut, to confirm that it did not shift. Re-adjust if necessary.
14. Rotate the engine through several compression cycles:
• Observe the movement of the valve gear.
• Return the piston to TDC compression stroke and re-check the valve lash to confirm consistent movement
of the valve gear, including the slight bump to the exhaust valve from the automatic compression release.
15. Clean-up any oil around the valve cover opening, clean the valve cover, replace the valve cover gasket if nec-
essary.
16. Install the valve cover, tightening the valve cover screws to a torque of 62 - 80 in-lbs (7-9 Nm).
IMPORTANT: Over tightening the valve cover will cause it to leak.
17. Install the spark plug.
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.
NOTE: Mice and other critters tend to build nests inside the engine shrouds while the snow blower is stored
during the long off season.