Craftsman 143.991200 Specifications download pdf (Page 26)

GOVERNOR

CLAMP

SCREW

PUSH

LEVER TO

WIDE OPEN

THROTTLE

TURN CLIP COUNTERCLOCKWISE ON ALL VERTICAL

SHAFT ENGINES EXCEPT VLV & VLXL. CLOCKWISE

ON ALL HORIZONTAL SHAFT ENGINES EXCEPT

OHH,OHSK 50,55 & OHM, OHSK 110,120.

SERVICE

GOVERNOR ADJUSTMENT

With the engine stopped, loosen the screw holding the governor lever to the governor shaft clamp. Push the

governor lever to move the carburetor throttle plate to the wide open position. Rotate the governor clamp

counterclockwise on all overhead valve engines covered in this manual. Hold the lever and clamp in this

position while tightening the screw (diag. 2).

GOVERNOR GEAR AND SHAFT SERVICE

After the cylinder cover is removed from the engine, the governor spool, gear, or governor shaft can be

removed. On some governor assemblies, the retaining ring must be removed to allow the spool or gear to

slide off the shaft. Other governor shafts use an upset to hold the governor spool on. If the gear requires

replacement, the governor shaft will have to be removed.

Governor Gear or Shaft Replacement,

Upset Style Governor Shaft

1. Grip the original spool in a vise and use a

twisting and pulling motion on the flange until

the spool is free.

2. Clamp the shaft in a vise and pound gently

on the flange with a wooden or plastic mallet

to remove the shaft (diag. 4).

NOTE: DO NOT TWIST THE SHAFT WHEN

REMOVING. THE SHAFT BOSS MAY

BECOME ENLARGED AND THE PRESS FIT

WILL NOT SECURE THE NEW GOVERNOR

SHAFT.

3. To install a new shaft, first assemble the gear

and washer on the shaft. Start the shaft into

the hole with a few taps from a soft faced

hammer.

4. Place the flange in a press with a solid piece

supporting the area below the shaft boss.

Press the shaft in until a part # 670297

(.0125" / .3175 mm) shim just becomes snug

(.010" - .020" / .254-.508 mm clearance)

(diag. 5).

SHIM

670297 (modified)

SHAFT BOSS

GEAR

WASHER

OHH SERIES - OLD STYLE

ROTATE CLAMP

COUNTERCLOCKWISE

THROTTLE OPEN

(PUSH COUNTERCLOCKWISE)

GOVERNOR

ROD

GOVERNOR

CLAMP

GOVERNOR

SCREW

STANDARD

LOCATION

GOVERNOR

LEVER

GOVERNOR

LEVER

THROTTLE OPEN

(PUSH COUNTER-

CLOCKWISE)

GOVERNOR

ROD

GOVERNOR

CLAMP

SCREW

ROTATE LEVER

& ROD

COUNTER-

CLOCKWISE

THROTTLE PLATE

THROTTLE LINK

OHH SERIES - NEW STYLE

THROTTLE

PLATE

(TOP VIEW)

YOU MUST USE THIS

LINK POSITION

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Craftsman 143.991200 Specifications Page 26

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