Manual Vanguard Twin Cylinder OHV Liquid-Cooled (page 78 of 85) (English)

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Vanguard

Twin-Cylinder OHV Liquid-Cooled Engine

Section 6 - Final Adjustments & Specifications

Page 73

The following tools are required when making carburetor

adjustments.

1. An accurate tachometer, such as Tool

#19389 .

2. Tang bender, Tool

#19480 .

Fig. 187

Start engine and run it for approximately 5 minutes to

allow engine to reach operating temperature.

1. Move equipment control lever to “SLOW” position.

2. Hold throttle lever against idle speed screw

and temporarily adjust idle to 1200 RPM, Fig. 188.

3. While holding throttle lever, SLOWLY turn idle

mixture screw for #1 cylinder clockwise until

engine speed just starts to slow (lean mixture).

4. Then, turn idle mixture screw counterclockwise 3/

8 turn.

NOTE: It may be necessary to readjust idle

speed screw to 1200 RPM before proceeding.

5. Adjust idle mixture screw for #2 cylinder as

described in steps 3 and 4.

6. Now, readjust idle speed screw to 1650 RPM.

7. Release throttle lever. Note RPM.

Fig. 188

8. If necessary, use tang bending Tool, #19480,

and bend governed idle tang to obtain 1850 RPM,

Fig. 189.

Fig. 189

9. IF CARBURETOR IS EQUIPPED WITH IDLE

MIXTURE LIMITER CAPS, INSTALL AT THIS

TIME.

a. Position limiter cap so that stop on limiter cap

is at mid point between stops on carburetor

body. Press limiter into position using knock

out pin , Tool

#19135, Fig. 190.

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Vanguard Twin Cylinder OHV Liquid-Cooled Manual

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