78/83/90 Series Horizontal Shaft Engines
48
Choke
78/83/90 series MTD engines are equipped with a choke. The snow engines are also equipped with a primer,
both of which must be used to start the engine.
NOTE: The choke should be opened after the engine starts. This can be a source of starting issues with cus-
tomers who are not familiar with manual chokes.
NOTE: On the summer engines, the entire choke
mechanism is part of the carburetor.
See Figure 4.20.
Choke mechanism (snow engines)
The choke is operated by a knob on the engine
shroud. If the choke plate fails to close fully, the engine will
be dif
ficult or impossible to start when cold.
See Figure 4.21.
Figure 4.20
Choke lever
Choke plate
Figure 4.21
Choke knob
Engine shroud
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