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Figure 19. Power take oil safely start switch
yag&cl ic the engaged position,
5- Tighten the two nuts [A} against the mounting bracket
(B),
6. Check the adjustment by starling the tractor. The starter
should actuate when the power take oH control lever is in
the disengaged position but should not actuate when the
power take off control lever t£ in the engaged position.
STARTER-GENERATOR BELT ADJUSTMENT
See figure 20. If the starter turns, hut the engine does not
rotate, the starter generator belt may need tightening. Pro¬
ceed as follows:
1- Raise the tractor hood as explained on page 9 under
Raising the Tractor llood-
2. See figure 20. Loosen slightly the two nuts (A) cap screw
(0) and nut (C).
Use a pry bar (D) similar to the one
shown between the generator and engine block to apply
pressure to the generator and tighten the belt.
The belt
should be Light enough so thumb pressure at (£} will de¬
flect it about 3/4r'-
3- While holding the pry bar to maintain tension on the
belt, tighten the mounting bracket at (C) securely.
4. Actuate the starter to make sure the engine will rotate. If
it does not, loosen the nut at (C) and apply more tension to
the belt.
5. Tighten the two nuts at (A) and the cap screw(B) securely.
6. Lower the hood anti lock it in place.
CARBURETOR ADJUSTMENT
The carburetor is adjusted at the factory and normally does
not need adjustment unless it has been disassembled or
tampered with.
INITIAL ADJUSTMENT
Initial adjustment will permit the engine to be started and
warmed up prior to final adjustment- Proceed as follows:
1. See figure 21. Turn the needle valve (A) clockwise until
it just closes
CAUTION: VALVE MAY B£ DAMAGED
Figure 20- Generator located on right side of engine,
BY TURNING IT IN TOO FAR.
2. Open the needle valve (A) one and one half turns coun¬
ter-clockwise,
3. Turn the idle valve (B) clockwise until it just closes.
4. Open idle valve (B) one half to three quarter turns.
FINAL ADJUSTMENT
1. Start the.engine and run it at full speed.
2. See figure 21. Turn needle valve (A) clockwise until en¬
gine misses, (Lean mixture), then turn it out (counter¬
clockwise) past the smooth operating point, until the engine
runs unevenly (Rich mixture). Now turn needle valve (A)
to the mid-point between the rich and lean mixture so the
engine runs smoothly.
3. Move the engine speed control lever to the slow position,
and set the idle spaed adjusting screw (C) so a fast idle is ob¬
tained (1200 RPM). Hold the throttle in this idle position
and turn the idle valve (B) clockwise (lean) and counter¬
clockwise (rich) until the engine idles smoothly.
4. Reset the idle speed so the engine idles at 1200 RFM. Push
the engine speed control lever forward to the Tast position,
the engine should accelerate without hesitation or sputtering.
If the engine does not accelerate property, readjust needle
valve (A) to a slightly richer mixture.
14
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