Service; Disassembly Procedure - Tecumseh ECV100 - 120 Technician's Handbook

5. Check the engine valve lash. Reset the valves at the proper lash.
6. Check the valves for proper seating and valve guide lash. Recondition the valves and seats. Replace the valves if
necessary.
7. Check the ignition timing. Check the flywheel key for partial shearing.

SERVICE

DISASSEMBLY PROCEDURE

The following procedures apply to most engine models.
Actual procedure may vary.
1. Disconnect the high tension lead from the spark plug.
Remove the spark plug.
2. Drain the oil from the crankcase. Drain or shut off the
fuel supply.
3. Remove the air cleaner assembly.
4. Remove the fuel tank if it is attached to the engine.
Fuel tanks may be held on with bolts, screws, or some
models require taps upward with a soft face hammer
loosening the plastic tank wedged in the blower housing
slots.
On some LEV engine models, removal of the bezel
cover is necessary to view the engine identification
or to provide access to the recoil assembly screws.
Push in toward the spark plug end (as shown), lift up
to clear the recoil, then pull the cover away from the
spark plug to remove. (diag. 11)
5. Remove the blower housing by first unscrewing the
screw holding the dipstick tube to the blower housing
or unscrewing the dipstick tube and removing the
remaining bolts on the blower housing.
6. Unplug the ignition kill wire from the terminal on top of
the ignition module and unbolt the ignition module.
7. Remove the flywheel nut, washer, and starter cup. Use
a strap wrench (part # 670305) to hold the flywheel
from turning (diag. 12). Thread the appropriate flywheel
knock-off tool part # 670103, (7/16") or part # 670169
(1/2") on the crankshaft until it bottoms out, then back-
off one complete turn. Using a large screwdriver, lift
upward under the flywheel and tap sharply and squarely
on the knock-off tool to break the flywheel loose. If
necessary, rotate the flywheel a half turn and repeat
until it loosens (diag. 13). A flywheel puller (part #
670306) may be used on engines with cored holes
and also on flywheels with holes drilled and tapped
(diag. 14).
NOTE: DO NOT USE A JAW TYPE PULLER.
8. Remove the flywheel key, stator, and baffle plate.
9. Remove the muffler.
10. Remove the intake pipe and the carburetor. Be careful
not to bend or damage the linkage when removing.
Mark the hookup points or diagram the linkage
arrangement to aid in reassembly.
11. Remove the cylinder head.
12. Remove the crankcase breather.
MODEL AND
D.O.M. NUMBER
DECAL
LOCATED
UNDER COVER
(IF SO EQUIPPED)
(continued on top of next page)
11
12
13
14
79