Service manual

Single Stage Snowthrower Service Manual 4 - 1
ENGINE REMOVAL AND INSTALLATION
1965 - 1985 MODELS, ENGINE REMOVAL
Certain engine servicing procedures will require
removing the engine from your snowthrower. The
following procedures are required for engine removal:
1. Drain the gasoline from the fuel tank. Refer to
“Draining The Fuel Tank” on page 2 - 5.
2. Remove all the mounting screws retaining the
upper shroud on 20” units. On all 14” and 21”
snowthrowers, remove both the upper and lower
shrouds. Be certain to install the gas cap after the
upper shroud is removed.
3. Disconnect the spark plug wire.
4. Pull the rope from the starter and tie a small knot
in the starter rope before the starter housing
(Figure 34). Allow the starter rope to retract until
the knot stops the starter rope at the starter
housing. Next, remove the knot in the starter
handle and slide the handle off the starter rope.
Figure 34 0217-017
5. Belt Drive Units:
A. Remove the left side plate and belt. Refer to
"Replacing Drive Belt" on page 5 - 1.
Complete steps 1 through 4.
B. Remove the crankshaft pulley. Refer to
"Replacing Drive Belt" on page 5 - 1.
Complete step 2.
Chain Drive Units:
A. Remove the left side plate, chain guard and
chain. To remove the chain, refer to "Chain
Replacement" on page 5 - 25. Consult step 2.
B. Remove the crankshaft sprocket. Refer to
"Crankshaft Sprocket Replacement (all
models)" on page 5 - 21. Consult step 3.
6. Remove the switch terminal from the key switch if
your unit is so equipped. Some 1980 model
S-200’s may have a terminal connection slightly
below the key switch. It will be necessary to
separate the two terminals.
7. Slide the primer hose off the primer bulb fitting.
8. Remove the choke control. Note: Do not bend or
misform the carburetor choke control linkage.
9. Remove the mounting screws retaining the lower
shroud on all 20” units. On electric start 20” units,
remove screws retaining the switch and plug
assembly to the lower shroud.
10. Using a hose clamp pliers or a needle nose pliers,
compress the fuel line clamp at the carburetor
fitting and slide the clamp down the fuel line hose
(Figure 35). Remove the fuel line from the
carburetor.
Figure 35 0217-018