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14

Fig. 20

Fig. 21

Fig. 22

ENGINE

TO AD JUST CARBURETOR

The carburetor has been preset at the factory and ad just ment 

should not be necessary.  However, engine per for mance 

can be affected by dif fer enc es in fuel, tem per a ture, al ti tude 

or load.  If the carburetor does need ad just ment, contact 

your nearest authorized service center/de part ment

IMPORTANT:

  NEVER TAMPER WITH THE ENGINE GOVER-

NOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED.  

OVER SPEED ING 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 EQUIP MENT AND 

EXPERIENCE TO MAKE ANY NEC ES SARY ADJUSTMENTS.

TO REPLACE V-BELT (SEE Fig. 20 - 22)

•  Clutch housing/engine assembly must be removed to 

service belt. See "TO REMOVE CLUTCH HOUSINGI-

ENGINE ASSEMBLY" in this section of manual.

•  Using pliers, remove cable spring and return spring 

from pivot bracket.

•  Remove plastic snap-in plug from clutch housing.
• 

Using pliers, depress conduit fitting tabs and pull conduit 

fitting through hole in clutch housing.

•  Pull cable spring and cable through snap-in plug hole 

in clutch housing.

•  Remove bolt, washer, and lock nut attaching idler 

bracket to clutch housing.

• 

Remove bolt, washer, and lock nut attaching idler pulley 

to idler bracket.  Remove bushing from between idler 

bracket and clutch housing.

• 

Replace belt and reinstall pulley, idler bracket, conduit 

fitting, springs, and hardware in reverse order.

• 

Reinstall clutch housing/engine assembly, making sure 

belt is inside belt guide stud.

• 

Check tine operation.  See "To Check Tine Operation" 

in this section of manual.

CABLE

SNAP-IN 

PLUG

CONDUIT 

FITTING

TABS

RETURN 

SPRING

CABLE 

SPRING

CLUTCH 

HOUSING

BELT 

GUIDE 

STUD

LOCK NUT

WASHER

BOLT

CLUTCH 

HOUSING

SNAP-IN 

PLUG

LOCK NUT

BOLT

WASHER

IDLER BRACKET

IDLER PULLEY

BUSHING

SERVICE AND ADJUSTMENTS

Summary of Contents for 433691

Page 1: ...01 12 10 AP 433691 Printed in the U S A Operator s manual 96083000300 2010 01 MC550...

Page 2: ...t Never allow adults to operate the equipment without proper instruction Keep the area of operation clear of all persons par ticularly small children and pets PREPARATION Thoroughly inspect the area w...

Page 3: ...STION ENGINE AND SHOULD NOT BE USED ON OR NEAR ANY UNIMPROVED FOREST COVERED BRUSH COVERED OR GRASS COVERED LAND UNLESS THE ENGINE S EXHAUST SYSTEM IS EQUIPPED WITH A SPARK ARRESTER MEETING APPLICABLE...

Page 4: ...S POSITION FRONT Fig 2 Fig 3 UNPACK CARTON INSTALL HANDLE See Fig 2 and 3 CAUTION Be careful of exposed staples when handling or disposing of carton material IMPORTANT WHENUNPACKINGANDASSEMBLINGTILLER...

Page 5: ...ration before first use See TINE OPERATION CHECK in the Service and Adjustments section of this manual TO INSTALL DEPTH STAKE See Fig 4 Remove screw s securing depth stake to skid and discard the scre...

Page 6: ...eaning Fig 5 MEETS ANSI SAFETY REQUIREMENTS Our tillers conform to the safety standards of the American National Standards Institute DEPTH STAKE Controls forward speed and the depth at which the tille...

Page 7: ...ition Replace the clevis pin and hairpin clip For normal tilling set depth stake at the second or third hole from the top Fig 7 HOW TO USE YOUR TILLER Know how to operate all controls before adding fu...

Page 8: ...aintenance section of this manual Fig 8 TO START ENGINE See Fig 9 OPERATION IMPORTANT WHENOPERATINGINTEMPERATURESBELOW 32 F 0 C USE FRESH CLEAN WINTER GRADE GASOLINE TO HELP ENSURE GOOD COLD WEATHER S...

Page 9: ...season to further condition the soil Soilconditionsareimportantforpropertilling Tineswill notreadilypenetratedry hardsoilwhichmaycontribute to excessive bounce and difficult handling of your tiller Ha...

Page 10: ...ine oil level Check tine operation Check for loose fasteners LUBRICATION Keep unit well lubricated See LUBRICATION CHART MAINTENANCE SCHEDULE FILL IN DATES AS YOU COMPLETE REGULAR SERVICE Check Engine...

Page 11: ...surface 3 Tiptilleronitssideasshownanddrainoilintoasuitable container Rock tiller back and forth to remove any oil trapped inside of engine 4 Wipe off any spilled oil from tiller or side of engine 5...

Page 12: ...eginning of each tilling season Spark plug type and gap setting are shown in PRODUCT SPECIFICATIONS on page 3 of this manual TRANSMISSION Your transmission is sealed and will not require lubrication u...

Page 13: ...shaft Fig 18 NARROW TILLING CULTIVATING 13 PATH See Fig 18 Remove outer tines tine_6 INNER TINES ONLY NOTE When reassembling outer tines ensure right tine assembly marked R and left tine assembly mark...

Page 14: ...GINE ASSEMBLY in this section of manual Using pliers remove cable spring and return spring from pivot bracket Remove plastic snap in plug from clutch housing Usingpliers depressconduitfittingtabsandpu...

Page 15: ...g 23 Unscrew top or bottom handle knob and washer and remove top or bottom carriage bolt Rotate entire handle assembly about carriage bolt pivot point and lay handle against engine shroud STORAGE TILL...

Page 16: ...nk and refill and clean carburetor 6 Stale or dirty fuel 6 Empty fuel tank and refill with fresh gasoline 7 Water in fuel 7 Empty fuel tank and carburetor and refill tank with fresh gasoline 8 Clogged...

Page 17: ...ODEL NUMBER MC550 96083000300 DECALS KEY PART NO NO DESCRIPTION 1 433415 Decal Tine Shield McCulloch 2 434458 Decal Tine Shield Warning 3 141906 Decal Warning Rotating Tines 4 141907 Decal Hand Placem...

Page 18: ...8 engine transmission tines_1 10 11 1 2 2 3 4 5 5 6 7 7 9 8 12 13 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 5 29 29 30 30 31 5 TILLER MODEL NUMBER MC550 96083000300 ENGINE TRANSMISSION AND TINES...

Page 19: ...Pivot 11 421373 Spring Return 12 421339 Bracket Idler 13 74610616 Bolt Hex 3 8 24 x 1 14 421379 Belt Drive 15 421378 Pulley Idler 16 19131416 Washer 13 32 x 7 8 x 16 Ga 17 74780620 Bolt 3 8 16 x 1 25...

Page 20: ...20 TILLER MODEL NUMBER MC550 96083000300 HANDLE WHEEL AND DEPTH STAKE Handles Wheels Depth Stake_1 ai 1 2 3 7 4 13 14 9 10 18 10 18 12 11 17 19 17 22 20 19 21 5 5 23 15 16 17 20 21 8 5 6 22 23...

Page 21: ...425398 Plug Snap In 11 432521 Weldment Transport Arm 12 4921H Clip Hairpin 13 421342 Stake Depth 14 326J Pin Clevis 15 72110610 Bolt 3 8 16 x 1 1 4 16 74780640 Screw Hex Head 3 8 16 x 2 5 17 73900600...

Page 22: ...s used for rental or commercial purposes is limited to 90 days from the date of original purchase 5 This Warranty applies only to products which have been properly assembled adjusted operated and main...

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