SERIAL MODEL NUMBER ENGINE NAMES PREFIX MODEL SIZE MAC 3BP 1-4003-0 3cc MB30 - - 3cc GAS POWERED ANTI-VIBRATION BACKPACK BLOWER The policy of McCulloch is one of continual improvement in design, manufacturing and engineering advancement wherever possible to assure still finer power tools. Hence, specifications, equipment colors, design and manufacturer s suggested list prices are subject to change without notice. McCulloch reserves the right to make such changes without prior notification or obligation to backfit or supply backfit components for units previously shipped from the factory. McCulloch products are identified by a model number (in this instance 4003) followed by a suffix number (0). Suffix numbers denote variations in parts or assemblies used in the manufacture of this product. Illustrated Parts Lists (IPLs) contain a PART NUMBER, DESCRIP- TION, UNITS per assembly and STOCKING CODE for each part. Stocking Codes are: A - Dealer stocked. Fast to medium moving part. B - Distributor stocked. Medium to slow moving part. C - Factory stocked. Slow moving part. MARCH 003 NOTE: The following explains symbols and footnotes in this IPL: (-) A dash preceding a PART NUMBER indicates that it is a new part number, different from the one listed in the previous IPL for this unit. ILLUSTRATED PARTS LIST P.O. Box 31 Tucson, Arizona 81-1 U.S.A. (.) One or more dots (. Spring, Starter) preceding a part DESCRIPTION indicates the part is included in the kit or assembly described directly above the dot(s). (-- --) If four dashes appear in place of a PART NUMBER, the part is not available individually but is included in the next higher assembly or subassembly. Circled numbers preceding a DESCRIPTION footnote the part or assembly to additional information on the page. (*) An asterisk denotes that choices follow or precede. 003 McCulloch Printed in U.S.A. PN 1180-03
FIGURE 1 3 4 8 9 8 30 31 4 48 4 49 0 POWERHEAD ASSEMBLY 3 4 3 3 38 3 3 39 40 41 4 4 4 3 3 4 3 1 8 4 3 33 3 3 9 0 39 38 3 0 4 30 31 3 48 49 4 8 9 4 4 4 4 34 44 43 1 1 1 1 10 13 19 18 0 14 1 1 1 4 3 11 1 3 4 9 8
POWERHEAD ASSEMBLY 1 B 11119 Screw, 10-4x. Taptite B 40 Kit, Muffler 1 3 - -- --. Screw 4 C 340-01. Plate, Muffler 1 B 3413 Screen, Spark Arrester 1 C 3414-90 Cover, Spark Arrester 1 A 30094 Screw, 8-1 x. Tr Hd Plastite 8 A 349-1 Cover, Air Box 1 9 A 439 Filter, Air 1 10 B 343-1 Box, Air Filter 1 11 C 34-90 Plate, Air Box 1 1 A 18083 Screw, 10-4 x Torx 13 - FIGURE 4 Carburetor Assembly 1 14 A 18933 Gasket, Carburetor 1 1 C 3434 Manifold, Carburetor 1 1 A 1831. Nut, 10-4 3 1 A 3188. Spacer, Rubber 18 B 3409. Cable, Throttle 1 19 A 111. Screw, 10-4 x. Tr Hd Torx 1 0 A 11103-00 Screw, 10-4 x.8 Taptite 1 A 3391 Gasket, Manifold 1 A 40 Fuel Tank Asy 1 3 A 198. Filter, Fuel 1 4 A 1. Hose, Fuel 1 A 13. Hose, Fuel Return 1 A 308. Kit, Fuel Cap w/retainer 1 A 310 Isolator, Fuel Tank 4 8 B 3013-01 Flywheel Asy 1 9 A 0001 Pawl Kit 9 - -- --. Retainer Ring 30 - -- --. Pawl, Starter 31 - -- --. Spring, Starter Pawl 3 B 1110 Washer, Conical Spring 1 33 B 11108 Nut 1 34 A 1014 Key, Flywheel 1 3 A 11103 Screw, 10-4 x.8 Taptite FIGURE 1 3 A 30138 Ignition Asy 1 3 A 3884. Kit, Spark Plug Wire 1 38 A 10.. Connector, Spark 1 39 A 9.. Boot, Spark Plug 1 40 B 133-01.. Grommet, H/T Lead, Split 1 41 B 11099.. Grommet, S/Plug Wire 1 4 B 1110 Screw, 10-4 x.3 3 43 A 339 Shroud, Engine 1 44 C 413 Short Block Asy 1 - -- --. C case Asy 1 - -- --. C shaft Asy 1 - -- --. Bearing 0 1 - -- --. Bearing 0RS 1 - -- --. Seal 1 4 - -- -- Connecting Rod Asy 1 4 - -- --. Bearing 4 - -- -- Kit, Piston, 3cc 1 48 - -- --. Piston Pin, C shaft 1 49 - -- --. Ring, Retaining 1 0 - -- --. Ring, Piston 1 1 A 1110 Screw, 10-4 x.88 Tri Rnd 4 A 34-90 Shield, Muffler 1 3 - -- -- Kit, Cylinder/Gasket, 3cc 1 4 A 40. Gasket, Cylinder 1 A 343-1 Cover, Cylinder/Muffler 1 A 30094 Screw, 8-1 x. Tr Hd Plastite 3 B 1844 Screw, 10-14 x. Torx 1 8 A 989 Spark Plug, RDJ8J 1 9 A 300 Wire Asy, Ground 1 0 A 3008 Wire Asy, Stop Switch 1 1 A 403 Gasket, C case 1 A 404-01 Plug, C case 1 3 A 1110 Screw, 10-4 x.88 Tri Rnd 4 C 343-90 Plate, C case 1 Not shown - Not used on this model 3
4 FIGURE GENERAL ASSEMBLY 3 1 A 4 1 13 14 18 19 3 4 8 9 8 0 9 8 1 11 8 9 33 30 31 41 44 4 1 4 3 43 0 1 34 4 3 33 3 3 38 48 49 39 40 9 10 0 1 1 3 4 4 8 8 9 10 1 14 1 1 1 13 14 1 1 3 3 4
GENERAL ASSEMBLY 1 B 18 Disc, Drive 1 B 4000 Kit, Impellar, Blower 1 A B 91-30001.Disc, Drive 1 3 A 11091 Nut, Hx /1-4 1 4 C 34834-0 Outer Housing 1 C 3414 Cover, Air Inlet 1 A 30094 Screw, 8-1 x. Tr Hd Plastite A 30094 Screw, 8-1 x. Tr Hd Plastite 8 8 C 3088 Inner Housing Asy 1 9 - -- --. Captive Nut 10 - -- --. Rope Guide 1 11 B 1110 Screw, 10-4 x.3 Sl Torx Tp 4 1 B 3009 Starter Housing Asy 1 13 A 3004. Spring/Starter Rewind 1 14 A 3008. Drum Rope Asy 1 1 B 33131.. Rope, Starter 4 1 1 B 410. Kit, Starter Housing 1 1 - -- --.. Rope Guide 1 18 A 31 Washer,. ID x /8 in. OD 3 19 A 30094 Screw, 8-1 x. Tr Hd Plastite 3 0 A 19 Handle, Starter 1 1 B 18941 Washer, Nylon 1 B 343 Cover, Rope 3 A 30094 Screw, 8-1 x. Tr Hd Plastite 4 4 A 30094 Screw, 8-1 x. Tr Hd Plastite 3 C 3401 Frame, Back 1 C 10088 Screw, Hx 1/4-0x. 4 B 110990 Washer,.x.80x.00 4 8 C 3418 Spring, Isolator 3 9 C 11130 Nut, 1/4-0 Type U 3 30 C 10088 Screw, Hx 1/4-0x. 31 B 14 Washer, Pl.0 ID 3 A 1943 Screw, Skt 1/4x0x1.0T 33 B 110990 Washer,.x.8x.0 4 FIGURE 34 C 3404 Housing, Control RH 1 3 C 340 Housing, Control LH 1 3 C 340 Trigger, Throttle 1 3 C 340 Knob, Lock 1 38 C 3413 Pin, Lock 1 39 C 11130 Spring, Trigger 1 40 C 111303 Spring, Lock 1 41 C 341 Wire Asy, Terminal 4 C 3408 Housing, Flex 1 43 C 3409 Clamp, Band 44 C 3411 Cable, Throttle 1 4 C 3410 Sleeve, Flex, mm 1 4 A 11101 Screw, -19x.Fl Hd Plast 4 C 341 Sleeve, Flex, 9mm 1 48 B 1843 Screw, Tr 8-1x. Torx 1 49 A 3009 Washer,.19 ID x.8 OD 1 0 C 3349 Switch, Rocker 1 1 B 3419 Clamp, Arm C 10088 Screw, Hx 1/4-0x. 3 B 1844 Screw, Tr 10-14x. Torx 4 A 1003 Washer, 10 Pl C 340 Cushion, Back 1 C 111304 Rivet, Ribbed 14. B 3403 Harness, Torso 1 8 C 34 Clamp, Cable 9/1 1 9 A 30094 Screw, 8-1x. Tr Hd Plast 1 0 B 1844 Screw, Tr 10-14x. Torx 1 1 A 9349 Washer,.49 OD -. ID 1 C 308 Bracket, Isolator, Upper 1 3 - -- --. Guide, Rope 1 4 C 10088 Screw, Hx 1/4-0x. 1 B 14 Washer, Pl. ID 1 B 304 Knob, Screw Asy 1 - FIGURE 1 Powerhead Asy 1 Appears on units produced before 8/98. SPECIFICATIONS Engine Type Air-cooled, two cycle, single cylinder Displacement 3.4cc (.0 ci) Idle RPM 3000-300 Compression after 10 pulls, throttle full open 90 lb/sq.in. Ignition Solid State / Electronic Flywheel to Ignition Gap 0.00 to 0.01 in. (0.18 to 0.304mm) Spark Plug RDJ8J or DJ8J Spark Plug Gap 0.0 in. (0.3mm) Fuel Tank Capacity 4 oz (1 cl) Running Time 0 minutes Air Volume 4 CFM Air Velocity 180 MPH Fuel to Oil Ratio 40:1 with McCulloch Custom Lubricant Dry Weight 1. lbs (. kg) Carburetor Diaphragm with Choke and Primer Starter Cord Nylon, Type 3., Length 4 in. (11cm)
BLOWER TUBES FIGURE 3 3 4 1 1 1 C 341 Tube, Air C 34 Nozzle, Concentator Outlet 1 3 C 340 Elbow, Flex Tube 1 4 B 343 Handle, Tube, RH 1 B 344 Handle, Tube, LH 1 A 11101 Screw, -19x.Fl Hd Plast 3 B 11119 Screw, 1-14x1. Torx 1 TORQUE SPECIFICATIONS DESCRIPTION FASTENER QTY FIG/ITEM NO. TORQUE (in.lbs) LOCTITE Muffler to Cylinder 11119 10-4 x. Taptite 1 / 1-0 Air Cover to Air Box 30094 8-1 x. Plastite 1 / 1-0 -- Air Box Plate to Carb Manifold 18083 10-4 x 1 / 1-3 -- Throttle cable to Carb Manifold 111 10-4 x. 1 1 / 19 1-0 4 Carb Manifold to Cylinder 11103 10-4 x.8 1 / 0-0 -- Flywheel to Crankshaft 11108 /1-0 Hex Nut 1 1 / 33 10-180 Ignition Module to Eng Shroud 11103 10-4 x.8 1 / 3 4-0 Engine Shroud to C case 1110 10-4 x. Taptite 3 1 / 4-0 C case to Cylinder 1110 10-4 x.88 4 1 / 1-0 Cylinder Cover to Inner Housing 30094 8-1 x. Plastite 3 1 / 1-0 -- Cylinder Cover to C case 1844 10-14 x.0 Plastite 1 1 / 1-0 -- Spark Plug 989 RDJ8J (DJ8J) 1 1 / 8 140-10 -- C case Plate to C case 1110 10-4 x.88 Taptite 4 1 / 3 40-4 Washer to Impeller 11091 /1 Hex Nut 1 / 3 0-80 -- Outer Housing to Inner Housing 30094 8-1 x. Plastite 8 / 1-0 -- Rope Cover to Inner Housing 30094 8-1 x. Plastite 4 / 3 1-0 -- Starter Housing to Inner Housing 30094 8-1 x. Plastite 3 / 4 1-0 --
FIGURE 4 CARBURETOR ASSEMBLY 31 3 9 4 11 3 4 1 1 14 1 9 30 19 1 38 3 34 33 3 8 10 3 3 0 1 1 18 13 8 B 3410-01 Carburetor - Zama C1U-M3A 1 1 -- --. Strainer 1 -- --. Plug, Welch 1 3 -- --. Retainer, Prime 1 4 -- --. Nozzle Asy, Check Valve 1 -- --. Shaft Asy, Throttle 1 -- --. Lever, Throttle 1 -- --. Spring, Throttle Return 1 8 -- --. Valve, Throttle 1 9 -- --. Diaphragm Asy, Metering 1 10 -- --. Diaphragm, Pump 1 11 -- --. Gasket, Metering Chamber 1 1 -- --. Gasket, Pump 1 13 -- --. Cover, Pump 1 14 -- --. Valve, Inlet Needle 1 1 -- --. Spring, Metering Lever 1 1 -- --. Lever, Metering 1 1 -- --. Pin 1 18 -- --. Screw, Throttle Adjust 1 19 -- --. Spring, Friction 1 0 -- --. Shaft Asy, Choke 1 1 -- --. Valve, Choke 1 -- --. Collar 1 3 -- --. Base Asy, Primer 1 4 A 3. Primer Bulb 1 -- --. Screw, Pin 1 -- --. Screw, Throttle Valve 1 -- --. Screw, Metering Cover 8 -- --. Screw, Pump Cover 9 -- --. Screw, Throttle Lever 1 30 -- --. Ball, Steel 1 31 -- --. Screw, Retainer 3 -- --. Spring, Adjust Screw 1 33 -- --. Washer, Limiter 1 34 -- --. Screw, Hi Speed 1 3 -- --. Screw, Low Speed 1 3 B 1111. Limiter Cap, High, -Stg Red 1 3 B 1111. Limiter Cap, Low, -Stg Nat 1 38 -- --. Retainer, Limiter 1 411 Kit, Major Repair (RB-9) 3004 Kit, Gasket/Diaphragm (GND-1)
P.O. Box 31 Tucson, Arizona 81-1 U.S.A. MANUFACTURING SALES SERVICE FOR WARRANTY OR SERVICE CONTACT THE NEAREST McCULLOCH AUTHORIZED SERVICE CENTER LISTED UNDER SAWS IN YOUR TELEPHONE DIRECTORY YELLOW PAGES. IF FURTHER ASSISTANCE IS REQUIRED CALL THIS TOLL-FREE HOT LINE. PLEASE REFERENCE YOUR MODEL AND SERIAL NUMBER. 1-800-1-89 MONDAY - FRIDAY - :00 AM - 4:30 PM (MST) www.mccullochpower.com USE ONLY GENUINE McCULLOCH REPLACEMENT PARTS McCulloch McCulloch Parts Parts