MB2500BP - Gas blower MTD - Free user manual and instructions

USER MANUAL MB2500BP MTD

For your own safety please read this manual before attempting to operate your new unit. Failure to follow instructions can result in serious personal injury. Spend a few moments to familiarize yourself with your blower before each use.

INTRODUCTION

PLEASE READ

The WARRANTY SYMBOL indicates that unless instructions or procedures are followed any damage caused will void the warranty and repairs will be at owner's expense. A CAUTION may also accompany the WARRANTY SYMBOL.

Service other than user maintenance should be performed by a McCulloch Authorized Service Center. Damage or conditions which render this product inoperable caused by improper maintenance practices will void the manufacturer's warranty.

FOR WARRANTY OR SERVICE CONTACT THE NEAR-EST McCULLOCH AUTHORIZATIONED SERVICE CENTER LISTED UNDER "SAWS" IN YOUR TELEPHONE DIRECTORY YELLOW PAGES.

TABLE OF CONTENTS

1 GENERAL INFORMATION 2

1-1. Specifications

2 GENERAL IDENTIFICATION 3

2-1. General Identification

3 SAFETY PRECAUTIONS 4

3-1. What To Do
3-2. What No To Do
3-3. International Symbols

4 ASSEMBLY INSTRUCTIONS 6

4-1. Attach Flex Tube
4-2. Attach Operating Tube
4-3. Attach Intermediate Tube and Concentrator Nozzle
4-4. Adjust Back Pack Harness and Control Handle

5 FUEL AND LUBRICATION 7

5-1. Fuel
5-2. Mixing Fuel
5-3. Fuel Mixing Table
5-4. Recommended Fuels
5-5. Fuel and Lubrication Symbols

6 STARTING/STOPPING INSTRUCTIONS 8

6-1. Starting a Cold Engine
6-2. Important Idling Information
6-3. Stopping The Engine
6-4. Starting a Warm Engine

7 OPERATING INSTRUCTIONS 10

7-1. Blower Operations
7-2. Operation Instructions

8 MAINTENANCE INSTRUCTIONS 11

8-1. Maintenance Schedule
8-2. Air Filter
8-3. Fuel Cap / Fuel Filter
8-4. Idle Adjustment
8-5. Spark Plug
8-6. Storage
8-7. Removing a Unit From Storage

9 TROUBLESHOOTING THE ENGINE 15
10 PARTS LIST 47

1 - GENERAL INFORMATION

1-1. SPECIFICATIONS

ENGINE

Engine Type . Air-cooled, 2 Cycle,
Displacement . 25cc (2.0ci)
Idle Speed RPM . 2,800 - 4,000rpm
Operating RPM . 7,800+ rpm
Ignition Type . Electronic
Ignition Switch . Rocker Switch
Spark Plug Gap . 0.024 in. (0.6 mm)
Lubrication . Fuel/Oil Mixture
Fuel/Oil Ratio . 40:1
Carburetor . with primer
Starter . Smooth PullTM Starting system
Muffler . Baffled with Guard
Fuel Tank Capacity . 17.58 oz. (520 ml.)

BLOWER

Throttle Control . Finger-Tip Trigger
Blower Velocity . up to 170 mph
Blower Air Output . up to 485 cfm
Approximate Unit Weight (No fuel) . 13.9 lb.
Use goggles and hearing protection

2 - GENERAL IDENTIFICATION

2-1. GENERAL IDENTIFICATION

1. THROTTLE TRIGGER
2. THROTTLE LOCK
3. ON/OFF IGNITION SWITCH
4. TOP ASSIST HANDLE
5. SPARK PLUG WIRE / SPARK PLUG
6. CHOKE LEVER
7. STARTER HANDLE
8. AIR CLEANER COVER
9. FUEL CAP
10. FUEL TANK
11. PRIMER BULB
12. HARNESS
13. CONTROL HANDLE

14. OPERATING TUBE

15. HOSE CLAMP

16. FLEX TUBE
17. THROTTLE LINKAGE
18. MUFFLER COVER
19. SPARK ARRESTER SCREEN
20. VENTED BACK PAD
21. INTERMEDIATE TUBE
22. 56mm NOZZLE
23. 40mm CONCENTRATOR NOZZLE
24. THROTTLE LINKAGE CLIPS

3 - SAFETY PRECAUTIONS

3-1. WHAT TO DO

READ YOUR USER MANUAL AND ALL SUPPLEMENTS (IF ANY ENCLOSED) THOROUGHLY BEFORE OPERATING YOUR UNIT.

1. WEAR CLOSE FITTING, TOUGH WORK CLOTHING that will provide protection, such as long slacks or trousers, safety work shoes, heavy duty work gloves, hard hat, a safety face shield, or safety glasses for eye protection and a good grade of ear plugs or other sound barriers for hearing protection.
2. REFUEL IN A SAFE PLACE. Open fuel cap slowly to release any pressure which may have formed in fuel tank. Always wipe unit of fuel or oil spills before starting. To prevent a fire hazard, move at least 10 feet (3 meters) from fueling area before starting.
3. COMPLY WITH ALL FIRE PREVENTION REGULATIONS. COMPLIANCE WITH ALL LOCAL, STATE, OR FEDERAL LAWS IN THE UNITED STATES IS THE USER'S RESPONSIBILITY. Your unit comes with a spark arrester screen furnished in the user kit. Replacement spark arrester screen kits are available at your nearest McCulloch Authorized Service Center listed under "SAWS" in your Telephone Directory Yellow Pages.
4. TURN UNIT OFF before setting it down, and also before installing or removing attachments.
5. KEEP ALL SCREWS AND FASTENERS TIGHT and the unit in good operating condition. Never operate this equipment if it is improperly adjusted or not completely and securely assembled.
6. KEEP HANDLES DRY, clean and free of fuel mixture.
7. STORE EQUIPMENT AWAY FROM POSSIBLE IGNITION SOURCES, such as gas-powered water heaters, clothes dryers, or oil-fired furnaces, portable heaters, etc.
8. ALWAYS KEEP the engine free of debris build-up.
9. OPERATION OF EQUIPMENT should always be restricted to mature and properly instructed individuals.
10. ALL PERSONS WITH RESPIRATORY PROBLEMS and persons operating blower in very dusty environments, should wear a dust particle mask at all times. Paper dust masks are available at most paint and hardware stores.

3-2. WHAT NOT TO DO

1. DO NOT USE ANY OTHER FUEL than that recommended in your manual. Always follow instructions in the Fuel and Lubrication section of this manual. Never use gasoline unless it is properly mixed with 2-cycle engine lubricant. Permanent damage to engine will result, voiding manufacturer's warranty.
2. DO NOT SMOKE while refueling or operating equipment.
3. DO NOT OPERATE UNIT WITHOUT A MUFFLER and properly installed muffler shield.
4. DO NOT TOUCH or let your hands or body come in contact with a hot muffler or spark plug wire.
5. DUE TO THE DANGER of exhaust fumes, never operate blower in a confined or poorly ventilated area.
6. NEVER POINT BLOWER in the direction of people, animals, buildings, automobiles, or windows, etc.
7. DO NOT operate unit without inlet cover installed to prevent contact with impeller.
8. DO NOT set a hot engine down where flammable material is present.
9. DO NOT OPERATE UNIT FOR PROLONGED PERIODS. Rest periodically.
10. DO NOT OPERATE UNIT WHILE UNDER THE INFLUENCE OF ALCOHOL OR DRUGS.
11. DO NOT ADD, REMOVE OR ALTER ANY COMPONENTS OF THIS PRODUCT. Doing so could cause personal injury and/or damage the unit voiding the manufacturer's warranty.
12. DO NOT operate your unit near or around flammable liquids or gases whether in or out of doors. An explosion and/or fire may result.
13. DO NOT WEAR loose clothing, scarfs, neck chains, unconfined long hair, and the like. Doing so could cause injury associated with objects being drawn into the rotating parts.
14. DO NOT refuel a running engine or an engine that is hot.

3 - SAFETY PRECAUTIONS

3-3.INTERNATIONAL SYMBOLS

Use of these personal safety items is highly recommended to reduce the risk of accidental injury.

Minimum operating distance

Pump the primer bulb 10 times.

Read the User Manual.

FULL Choke Position

PARTIAL Choke Position

RUN Choke Position

4 - ASSEMBLY INSTRUCTIONS

4-1. ATTACH FLEX TUBE

Put the hose clamp(C) on the flex tube before connecting the flex tube and the fan's outlet tube together.

Connect the flex tube (B) to the fan's outlet tube (A) (Fig. 4-1A) with a hose clamp (C) (Fig. 4-1B) and tighten securely (Fig. 4-1B).

4-1A

4-1B

NOTE: keep the throttle cable as straight as possible when connecting the blower tubes.

1. Place the unit on flat surface during assembly. Insure screw mechanism of clamp is positioned away from operator.
2. Put the hose clamp (C) on the flex tube and the operating tube before connecting them together.
3. Turn the throttle linkage mark (D) so it aligns with the throttle handle (F) (Fig.4-2A). Insert the operating tube (E) into the flex tube (B) (Fig. 4-2A) and then tighten securely with a hose clamp (G) (Fig. 4-2B).
4. Attached throttle linkage clips (# 24-know your blower) - to both ends of the flex tube to secure the throttle cable. ( Fig. 4-2D)

4-2A

4-2B

4-2C

4-2D

4 - ASSEMBLY INSTRUCTIONS

4-3. ATTACH INTERMEDIATE TUBE AND CONCENTRATOR NOZZLE

Connect the intermediate tube (H) and concentrator nozzle (I) or 56mm nozzle (J) (you can only use I nozzle at time). Push the tubes together and turn them clockwise so that they lock together (Fig. 4-3A). Use concentrator nozzle when you need more airflow in tight places: flower beds, under decks, etc.

4-3A

4-4. ADJUST BACK PACK HARNESS AND CONTROL HANDLE

1. Place blower on your back by slipping arms through the shoulder straps as if you were putting on a jacket (Figure 4-4A).
2. Adjust backpack harness and control handle.
3. Once adjustments have been made, to the straps for user comfort, remove the blower from your back and place on level ground in an upright position.

4-4A

5 - FUEL AND LUBRICATION

5-1. FUEL

Use regular grade unleaded gasoline mixed with Genuine Factory Parts 40:1 custom 2-cycle engine oil for best results. Use mixing ratios in Section 5-3.

Never use straight gasoline in your unit. This will cause permanent engine damage and void the manufacturer's warranty for that product. Never use a fuel mixture that has been stored for over 90 days.

If 2-cycle lubricant other than Genuine Factory Parts Custom Lubricant is to be used, it must be a premium grade oil for 2-cycle air cooled engines mixed at a 40:1 ratio. Do not use any 2-cycle oil product with a recommended mixing ratio of 100:1. If insufficient lubrication is the cause of engine damage, it voids the manufacturer's engine warranty.

5-2. MIXING FUEL

Add oil to an approved fuel container followed by the gasoline to allow incoming gasoline to mix with oil. Shake container to ensure thorough mix.

Lack of lubrication voids engine warranty. Gasoline and oil must be mixed at 40:1.

5-3. FUEL MIXING TABLE

GASOLINE	McCulloch 40:1 Ratio Custom Lubricant
1 U.S. Gal.	3.2 oz.	95ml (cc)
5 Liters	4.3 oz.	125ml (cc)
1 Imp. Gal.	4.3 oz.	125ml (cc)
Mixing Procedure	40 Parts Gasoline to 1 Part Lubricant
1ml = 1cc

5-4. RECOMMENDED FUELS

Some conventional gasolines are being blended with oxygenates such as alcohol or an ether compound to meet clean air standards. Your McCulloch engine is designed to operate satisfactorily on any gasoline intended for automotive use including oxygenated gasolines.

5-5. FUEL AND LUBRICATION SYMBOLS

6-1. STARTING A COLD ENGINE (Above 55^ )

Mix the bottle of 2-cycle oil (included) with 1 gallon of unleaded gasoline (less than 30 days old). Combine them in a separate container using a 40:1 ratio. Pour into fuel tank.

1. Squeeze throttle (A) and push throttle lock (B) to advance throttle for starting. (Figure 6-1A)
2. Pump "primer bulb" (C) 10 times. (Figure 6-1B)
3. Move choke lever to Choke "1".(Figure 6-1C)
4. With the unit on the ground, hold the top assist handle and step on the bottom of the frame with foot. Pull starter rope 6 times. (Figure 6-1D)

NOTE: The unit uses the Smooth Pull™ starting system, which significantly reduces the effort required to start the engine. You must pull the starter rope out far enough to hear the engine attempt to start. There is no need to pull the rope briskly--there is no harsh resistance when pulling. Be aware that this starting method is vastly different from (and much easier than) what you may be used to.

1. Move choke lever to "2" (Fig. 6-1E)
2. Pull starter rope again 1~6 times (Fig. 6-1F)
3. The engine should start. After 30 sec. Move choke to "3".(Fig. 6-1G)
4. Squeeze throttle and release to disengage lock; Unit is now at idle. (Fig. 6-1A)

NOTE: If engine fails to start after repeated attempts, refer to Troubleshooting section.

NOTE: Always pull starter rope straight out. Pulling starter at an angle will cause rope to rub against the eyelet. This friction will cause the rope to fray and wear more quickly. Always hold starter handle when rope retracts. Never allow rope to snap back from extended position. This could cause rope to snag or fray and also damage the starter assembly.

6-1A
6-1B

6-1C

6-1D

6-1E

6-1F
6-1G

6 - STARTING/STOPPING INSTRUCTIONS

6-2. IMPORTANT IDLING INFORMATION

In some cases due to operating conditions (altitude, temperature etc.) your blower may need a slight adjustment to the idle speed.

After warm up, If unit does not Idle after restarting 2 times, follow these steps to adjust idle.

1. Locate the idle adjustment screw (E) on the carburetor (Fig. 6-2).
2. Using a Phillips or slotted screwdriver - turn screw 1/4 to 1/2 turn clockwise (to the right). Unit should then idle properly.

6-2

6-3. STOPPING THE ENGINE

Emergency Stopping Procedure. When it is necessary to stop blower engine immediately, DEPRESS the OFF "STOP STOP" switch until the engine stops completely (Fig. 6-3).

Normal Stopping Method. For normal stopping, release trigger and allow engine to return to idle speed. Then DEPRESS the OFF "STOP" switch until the engine stops completely. (Fig. 6-3)

6-3

6-4. STARTING A WARM ENGINE (Engine has been stopped for no more than 15-20 minutes).

1. Set throttle (see step 1 for starting a cold engine), choke "3", pull starter rope.
2. If engine does not start, or starts and then stops after 5 rope pulls, follow procedure "STARTING A COLD ENGINE".

7-1. BLOWER OPERATIONS

WARNING

Because of flying debris, always wear American National Standards Institute approved shielded safety glasses or face shield when operating blower.

WARNING

Before using your blower, review Safety Precautions in your User Manual, and all regulations for operation of the unit. These precautions and regulations are for your protection.

CAUTION

DO NOT operate the blower with other people or animals in the immediate vicinity. Allow a minimum of 50 feet (15 meters) between operator and other people or animals.

1. Use the blower for trees, shrubs, flower beds, and hard-to-clean areas.
2. Use the unit around buildings and for other normal cleaning procedures.
3. Use the blower around walls, overhangs, fences, and screens.
4. We recommend that a face mask be worn when operating blower in dusty areas.
5. Stand away from the debris, at a distance that will easily allow you to control the direction of blown debris. Never blow debris in direction of bystanders.
6. To control velocity of airstream, blower can be operated at any speed between idle and full throttle. Experience with the unit will help you determine the amount of airflow necessary for each application.
7. Operate power equipment only at reasonable hours-- not early in the morning or late at night when people might be disturbed. Comply with times listed in local ordinances.
8. To reduce sound levels, limit the number of pieces of equipment used at any one time.
9. Operate power blowers at the lowest possible throttle speed to do the job.
10. Check your equipment before operation, especially the muffler, air intakes and air filters.
11. Use rakes and brooms to loosen debris before blowing. In dusty conditions, slightly dampen surfaces when water is available.
12. Conserve water by using power blowers instead of hoses for many lawn and garden applications, including areas such as gutters, screens, patios, grills, porches and gardens.
13. Watch out for children, pets, open windows or freshly washed cars, and blow debris safely away.
14. Use intermediate tube plus nozzle of your choice so the airstream can work close to the ground.
15. After using blowers and other equipment, CLEAN UP! Dispos of debris in trash receptacles.

7-2. OPERATION INSTRUCTIONS

1. Follow the instructions "STARTING A COLD ENGINE".
2. Once unit is running, place unit on your back by slipping arms through the shoulder straps as if your were putting on a jacket (Figure 7-2A).
3. When preparing to clear an area of debris, always position yourself so that you can control the direction debris will be blown.
4. The control handle and the flexibility of the blower tube assembly will allow you to clear the most hard-to-reach areas. (Fig. 7-2B)
5. The hand grip, throttle trigger, throttle lock and ignition on/off switch are all mounted on a swivel handle that offers a wide range of operating positions and comfort (Fig. 7-2C).

7-2A

7-2B

7-2C

8 - MAINTENANCE INSTRUCTIONS

8-1. MAINTENANCE SCHEDULE

Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be a part of any seasonal tune-up.

NOTE: Maintenance, replacement, or repair of the emission control devices and system may only be performed by a McCulloch or other qualified service dealer.

WARNING

To prevent serious injury, never perform maintenance or repairs with unit running. Always service and repair a cool unit. Disconnect the spark plug wire to ensure that the unit cannot start.

A good preventive maintenance program of regular inspection and care will increase life and improve performance of your chain saw. This maintenance checklist is a guide for such a program.

Cleaning, adjustment, and part replacement may be required, under certain conditions, at more frequent intervals than those indicated.

CUSTOMER RESPONSIBILITY

MAINTENANCE CHECKLIST		AFTER EACH USE	HOURS OF OPERATION
ITEM	BEFORE EACH USE		10	20
CHECK FOR LOOSE SCREWS/ NUTS/BOLTS	✓
CLEAN OR REPLACE AIR FILTER			✓
REPLACE FUEL FILTER			✓
REPLACE SPARK PLUG				✓
INSPECT SPARK ARRESTER SCREEN			✓
INSPECT FUEL HOSES	✓
INSPECT TUBES	✓

8 - MAINTENANCE INSTRUCTIONS

8-2. AIR FILTER

To Clean Air Filter:

1. Remove cover (A) by depressing clip on top of cover and lift filter (B) from air box (Fig. 8-2A & Fig. 8-2B).
2. Wash filter in soap and water. DO NOT USE GASOLINE!
3. Air dry filter and cover.
4. Reinstall filter.

NOTE: Replace filter if frayed, torn, damaged or unable to be cleaned.

8-2A

8-2B

8-3. FUEL CAP / FUEL FILTER

NOTE: Keep vent (A) on fuel cap clean of debris (Fig. 8-3A).

Fuel Filter:

1. Completely remove fuel cap from fuel tank (B) to be able to remove fuel filter (D) from tank. Use a piece of wire (C) with a hook formed at the end to pull filter out of tank. (Fig. 8-3B)
2. Pull filter (D) off with a twisting motion. (Fig. 8-3C)
3. Replace fuel filter (D). (Fig. 8-3C)

NOTE: Never operate the blower without the fuel filter. Internal engine damage could result!

8-3A

8-3B

8-3C

8-4. IDLE ADJUSTMENT

The carburetor was pre-set at the factory for optimum performance. If further adjustments are necessary take your blower to a McCulloch or other qualified service dealer.

8 - MAINTENANCE INSTRUCTIONS

8-5. SPARK PLUG

1. To remove spark plug (A) (Fig. 8-5A) for cleaning or replacement: make sure engine is off, spark plug is cool, then grasp spark plug boot firmly and remove from spark plug. Remove spark plug with correct spark plug tool. Inspect, clean or replace as needed.
2. Spark plug gap = .025" (.635mm) (Fig. 8-5B).
3. Torque to 120 inch pounds (12 to 15 N·m). Connect spark plug boot.
4. If needed, replace spark plug with Champion RZ7C or equivalent.

8-5A

8-5B

8-6. STORAGE

Failure to follow these steps may cause varnish to form in the carburetor which can cause difficult starting or permanent damage following storage.

1. Perform all the general maintenance recommended in the Maintenance Section of your User Manual.
2. Clean exterior of engine and blower tubes.
3. Drain fuel from the fuel tank by running the unit dry or by removing the fuel cap and tipping the motor housing/fuel tank over and draining oil/fuel mixture into a container with the same 2-cycle fuel mixture.
4. After fuel is drained, start engine.
5. Run engine at idle until unit stops. This will purge the carburetor of fuel.
6. Allow engine to cool (approx. 5 minutes).
7. Using a spark plug wrench, remove the spark plug.
8. Pour 1 teaspoon of clean 2-cycle oil into the combustion chamber. Pull starter rope slowly several times to coat internal components. Replace spark plug.
9. Store unit in a cool, dry place away from any source of ignition such as an oil burner, water heater, etc.

8-7. REMOVING A UNIT FROM STORAGE

1. Remove spark plug.
2. Pull starter rope briskly to clear excess oil from combustion chamber.
3. Clean and gap spark plug or install a new spark plug with proper gap. (Fig. 8-5B)
4. Prepare unit for operation.
5. Fill fuel tank with proper fuel / oil mixture. See Fuel and Lubrication Section.

9 - TROUBLESHOOTING THE ENGINE

PROBLEM	PROBABLE CAUSE	CORRECTIVE ACTION
Unit won't start or starts but will not run.	Incorrect starting procedures.	Follow instructions in the User Manual.
	Incorrect carburetor mixture adjustment setting.	Have carburetor adjusted by an Authorized Service Center.
	Fouled spark plug	Clean / gap or replace plug.
	Fuel filter plugged.	Replace fuel filter.
Unit starts, but engine has low power.	Incorrect lever position on choke.	Move to RUN position.
	Dirty spark arrester screen.	Replace spark arrester screen.
	Dirty air filter.	Remove, clean and reinstall filter.
	Incorrect carburetor mixture adjustment setting.	Have carburetor adjusted by an Authorized Service Center.
Engine hesitates.	Incorrect carburetor mixture adjustment setting.	Have carburetor adjusted by an Authorized Service Center.
No power under load.
Runs erratically.	Incorrectly gapped spark plug.	Clean / gap or replace plug.
Smokes excessively.	Incorrect carburetor mixture adjustment setting.	Have carburetor adjusted by an Authorized Service Center.
	Incorrect fuel mixture.	Use properly mixed fuel (40:1 mixture).

McCulloch

MANUEL DE UTILISATION

Souffleur à Dos

Modèle : MB2500BP

SECURITE • FONCTIONNEMENT • ENTRETIEN

AVERTISSEMENT·LIRE ATTENTIVEMENT

Position RUN (FONCTIONNEMENT)

4 - INSTRUCTIONS POUR MONTAGE

4-1. FIXATION DU TUBE FLEXIBLE

McCULLOCH CORPORATION DEPARTAMENTO DE SERVICIO DEL PRODUCTO

CONTENIDO

1 GENERAL INFORMATION 34

5 COMBUSTIBLE Y LUBRICATION 39

For problems or questions, DO NOT return this product to the store. Contact your Customer Service Agent .

Canada Imported by / Importé par:

MTD PRODUCTS

97 Kent Avenue

Kitchener, ON

CANADA N2G 4J1

For Consumer Assistance Please Call L'Aide Du Consommateur Necessitez S'il Vous Plait Para La Ayuda Del Consumidor Llame Por Favor

U.S.A. 1-866-747-9816
CANADA 1-800-668-1238