McCulloch MC900 Service And Adjustments, Engine, TO REPLACE V-BELTSee Fig, To Adjust Carburetor

SERVICE AND ADJUSTMENTS

FINAL CHECK “ON” POSITION

•With tine control “ON” (held down to handle) push down on handle to raise tines off the ground.

•Slowly pull recoil starter handle while observing tines. Tines should rotate forward.

•If tines do not rotate, inner wire of control cable is too loose. Loosen cable clip and pull cable up to remove slack and retighten clip.

•Recheck in “ON” position and adjust if necessary. NOTE: If “ON” position check required adjustment, recheck “OFF” position adjustment to insure tines do not rotate when control is “OFF” (up).

FORWARD TINE

CONTROL IN “OFF”

(UP) POSITION

TINE CONTROL

“ON” POSITION

BODY

TINE CONTROL CABLE

CABLE CLIP

TO REPLACE V-BELT (See Fig. 21)

Replace V-belt if it has stretched considerably or if it has cracks or frayed edges.

•Belt guard must be removed to service belt. See “TO REMOVE BELT GUARD” in this section of manual.

LT REMOVAL

•Remove V-belt from transmission pulley first and then from engine pulley.

BELT REPLACEMENT

•Install new V-belt to engine pulley first then to transmis- sion pulley. Be sure belt is positioned on inside groove of both pulleys, inside all belt guides and rests on idler pulley.CHECK TINE OPERATION

•See “TINE OPERATION CHECK” in this section of manual.

•Replace belt guard.

BELT GUIDE

ENGINE PULLEY

BELT GUIDE

V-BELT

Fig. 19

TO REMOVE BELT GUARD (See Fig. 19)

•Remove screws from side of belt guard.

•Pull belt guard out and away from unit.

•Replace belt guard by reversing above procedure. Be sure slot in bottom of belt guard is under head of tine shield bolt and all nuts are tightened securely.

BELT GUARD

SCREW

SCREW

SCREW

Fig. 20

IDLER PULLEY TRANSMISSION

PULLEY

Fig. 21

ENGINE

TO ADJUST CARBURETOR

The carburetor has been preset at the factory and adjustment should not be necessary. However, engine performance can be affected by differences in fuel, temperature, altitude or load. If the carburetor does need adjustment, contact your nearest authorized service center/department

IMPORTANT:NEVERTAMPERWITHTHEENGINEGOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE THE FACTORY HIGH SPEED SETTING CAN BE DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEAREST AUTHORIZED SERVICE CENTER/ DEPARTMENT, WHICH HAS THE PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

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