Specifications

18
HIGH SPEED
ADJUSTMENT
SCREW
LOW SPEED
ADJUSTMENT SCREW
IDLE
MIXTURE
SCREW
MAIN MIXTURE SCREW
COUNTERCLOCKWISE
TO INCREASE SPEED
CLOCKWISE TO
DECREASE SPEED
SPEED CONTROL
MOUNTING BOLTS
20
Engine Speed and Mixture Adjustments - continued
3-5 H.P. Vertical Shaft Engines
21
HIGH SPEED
ADJUSTMENT
SCREW
LOW SPEED
ADJUSTMENT SCREW
22
SPEED ADJUSTMENT TAB
BEND TO INCREASE SPEED
BEND TO DECREASE SPEED
23
The second is on a bracket located between the
blower housing and the speed control (diag. 20).
Low speed is adjusted by the throttle crack screw
on the carburetor (diag. 19 and 20).
It may be necessary to preset the carburetor mixture
screws.
Tecumseh Carburetors
Engine Model Main Pre-set Idle Pre-set
All models with
float-type carburetors 1-1/2 turn 1 turn
All models with
diaphragm-type
carburetors 1 turn 1 turn
Some speed control brackets are adjusted by
loosening the speed control bracket mounting bolts
and sliding the bracket all the way to the right and re-
tightening the mounting bolts (diag. 21). The high
speed adjustment screw is located on the speed
control lever (diag.22) Some carburetors are fixed
speed and are adjusted by bending the adjusting tab
attached to the intake manifold (diag. 23).
After setting the engine speeds recheck the fuel
mixtures, then recheck the engine speeds.