Sears 917.25004, 917.25446 Starling your Tractor With a Weak Battery, Main Fuel Adjusting Needle

REPAIR ADJUS T$

LEAD-ACID BATTERIES GENERATE

FLAME AND SMOKING MATERIALS

EXPLOSIVE GASES. KEEP SPARKS, AWAY FROM BATTERIES. ALWAYS

WEAR EYE PROTECTION WHEN

AROUND BATTERIES.

IDLE FUEL

ADJUSTING

NEEDLE

IDLE SPEED

ADJUSTING

SCREW

1_ Starling your Tractor With a Weak Battery

If your battery is too weak to start the engine, it should be recharged.. If '_umper cables" are used for" emergency starting, follow this procedure.:

NOTE: YOUR TRACTOR IS EQUIPPED WITH A 12 VOLT NEGATIVE GROUNDED SYSTEM THE OTHER VEHICLE MUST ALSO BE A t2 VOLT NEGATIVE GROUNDED SYSTEM

a.Connect each end of the RED jumper cable to the POSITIVE(+) terminals of each battery (taking care not to short against chassis). (Fig.. 28)

bConnect one endof the BLACK jumper cable to the NEGATIVE (-) terminal of fully charged battery..

cConnectthe other endofthe BLACK jumpercable

to the L.H. side panel bolt(Fig, 14) NOTE: KEEP AWAY FROM GAS TANK' AND BATTERY..

d.Disconnect cablesfin reverse order:

1.L../-/. side panel bolt (Fig I4)

2 Negative terminal of fully charged battery

3.Positive terminals

DO NOT USE YOUR TRACTOR BAT-

MAIN FUEL

ADJUSTING

NEEDLE

FIGURE 29

CASING

CLAMPSTOP SCREWSPEED CONTROL SCREW

THROllLE

CABLE

FIGURE 30

STOP

SCREW

SPEED

LEVER

FIGURE 30A

TERY TO START OTHER VEHICLES

2 Throttle Control Cable Adjustment

Never" attempt to change maximum engine speed._ This !s preset at the factory (3600 rpm +_75 [pm) and should only be changed by a qualified service techni- cian who has the necessary equipmenL

a.. Remove hood (Fig, 32)_

b._ Loosen casing clamp screw (Fig,. 30) until throttle cable is free to move.

c, Move throttle control (on dashboard) to "FAST" position_

d._ Pull throttle cable tight (until speed control lever (Fig. 30A) is against stop screw (Fig., 30A). Re- tighten casing clamp screw,.

PAGE 12

REFER TO "'STARTING THE ENGtNE 'II]

3, Carburetor Adjustment

In generat, turning the adjusting needles (Fig_29) in (clock- wise) decreases the supply of fuel to the carburetor_ This

gives a leaner fuel/air mixture, Turning the adjusting needles (Fig. 29) out (counterclockwise) increases the supply of fuel to the carburetor. This gives a richer fuel/air mixture_ Setting the needles midway between the lean and rich positions will usually give the best results,,

Adjust the carburetor as follows;

a..With the en_Tinestopped, turn the idle fuel adjust- ing needle m (clockwise) until it bottoms lightly.,

NOTE: The tip of the idle fuel and main fuel adjusting needles are tapered to critical dimen- sions_ Damage to the needles and the seats in carburetorbody will result ff the needles are forced

bPreliminary settings.: Turn the adjusting needles

out (counterclockwise) from lightlybottomed_ .Turn the idle 1-1/4 turns, turn the matn i turn.

	c,.	StartttTeengineandrunathalfthrottleforfivetoten
		minutes to warm up.. The engine must be warm
2O		before making final settings (Steps d, e, f, and g),.
	d,	Place the throttle into the 'last"position.,