LawnMaster NPTBL26A Service Manual
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LawnMaster NPTBL26A Service Manual

Handheld leaf blower
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SERVICE MANUAL
26cc-2 Cycle Handheld Leaf Blower
NPTBL26A
Read all safety rules and instructions carefully before servicing this tool.
601 Regent Park Court Greenville, SC 29607, 1-866-384-8432

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Summary of Contents for LawnMaster NPTBL26A

  • Page 1 SERVICE MANUAL 26cc-2 Cycle Handheld Leaf Blower NPTBL26A Read all safety rules and instructions carefully before servicing this tool. 601 Regent Park Court Greenville, SC 29607, 1-866-384-8432...

  • Page 2: Table Of Contents

    CONTENTS Section Page CONTENTS SPECIFICATIONS GENERAL SAFETY RULES PARTS AND FEATURES 6-10 WIRING DIAGRAM AND MANAGEMENT GENERAL TROUBLESHOOTING 12-21 AIR & FUEL SYSTEM 22-28 THROTTLE AND STARTER SYSTEM 29-33 NOPULL™ STARTER SYSTEM 34-37 26CC 2-CYCLE ENGINE MANUFACTURER'S WARRANTY AND CONTACT...

  • Page 3: Specifications

    SPECIFICATIONS UNIT SPECIFICATIONS Engine Engine Size 2-Stroke / Full Crank Engine Displacement 26cc Ignition Capacitor Discharge Ignition (CDI) Fuel System Carburetor All Position Diaphragm Type With Primer Bulb Air Filter Foam (Dry) Engine Shut Off Auto-Reset Throttle Control Variable Speed Trigger Fuel / Oil Ratio 40 : 1 Fuel Tank Capacity...
  • Page 4 SPECIFICATIONS Apply the thermostable screw-thread glue into the holes on cylinder and then pre-screw the 2 screws (M5X20) securing the ground line, spacer and ignition Ignition coil to cylinder coil to cylinder. Insert a feeler gauge of 0.014 inch. 27-35 feeler gauge.

  • Page 5: General Safety Rules

    GENERAL SAFETY RULES SAFETY reduce the risk of injury associated with thrown objects, always wear eye protection. Eye protection should meet the requirements of ANSI Z87.1. To reduce the risk of injury associated with the associated with objects being drawn into rotating parts, do not wear loose clothing, scarves, jewelry, etc.

  • Page 6: Parts And Features

    PARTS AND FEATURES NPTBL26A EXPLODED VIEW...
  • Page 7 PARTS AND FEATURES NPTBL26A PARTS LIST Part Number Description Quantity Number Air Inlet Cover Engine Housing Assembly Washer Assembly Impeller Bearing Assembly Cleva 26cc 2-Cycle Engine Handle Assembly Upper Handle Assembly Starter Set Battery Release Button Cruise Control Lever Stop Switch...
  • Page 8 PARTS AND FEATURES EXPLODED VIEW 26CC 2-CYCLE ENGINE...
  • Page 9 PARTS AND FEATURES 26CC 2-CYCLE ENGINE PART LIST Part Number Description Quantity Number 321001133 Logo 301001139 Engine Cover 551023117 Flange Nut M8 301001140 Flywheel Assembly 301001141 Crankcase Assembly 301001142 Anti-Vibrating Washer 311014125 Flat Key 301001123 Fuel Cap Assembly 321002121 Fuel Tank Grommet 301001143 Oil Reservoir 301001144...
  • Page 10 PARTS AND FEATURES 321002132 Needle Bearing 321002133 Piston Pin 321002113 Spacer Set 321001138 Insulation Sheet 301001132 321001139 Spark Plug 301001157 Positive Stop Switch Cable 321002111 Ignition Coil Assembly 301001134 Throttle Lever 301001158 Screw 301001159 Screw 301001160 Bolt 321001163 Screw 301001161 Screw 301001162 Screw...

  • Page 11: Wiring Diagram And Management

    WIRING DIAGRAM AND MANAGEMENT - IGNITION AND STARTING Push-Start 2S Battery Pack Starter Switch (Self-reset) Battery Connector VCC’ VCC’ Bullet Terminal(BL) Battery PCB ASSEMBLY Connector Electric Motor Handle Engine Bullet Terminal(BL) Ignition Handle Stop Switch(Self-reset) 3.5 Bullet Terminal 3.5 Bullet Terminal lgnition Coil Spark Plug...

  • Page 12: General Troubleshooting

    GENERAL TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION The electric motor does The battery is not fully Charge the battery fully and insert it not start, and the battery charged or not inserted correctly. correctly. The motor does not start, Allow the battery to cool to room and the battery indicator The battery is overheated.
  • Page 13 GENERAL TROUBLESHOOTING No fuel. Add fuel to the fuel tank. The fuel tube is blocked. Remove the blockage. The carburetor nut loosens Tighten the carburetor nut or replace the and has air leakage. carburetor washer. Clean or replace the spark plug. Reset the spark plug gap.
  • Page 14 GENERAL TROUBLESHOOTING Cylinder is worn internally. Replace the cylinder. Piston and piston ring are Replace. worn out. The spark plug electrode is Dry the spark plug. moist. Spark plug has carbon Remove the carbon deposit. deposit. Spark plug insulation is Replace the spark plug.
  • Page 15 GENERAL TROUBLESHOOTING The stop switch wire does Connect the wire. The engine cannot be not connect. stopped. The stop switch is broken. Replace. Incorrect carburetor Re-adjust the carburetor. adjustment. Gasket or washer has air Replace or re-tighten. leakage. No load speed is instable. Fuel tube is broken.
  • Page 16 GENERAL TROUBLESHOOTING Engine Compression (See Figs. 1-4) Low compression will cause erratic idling, low power, and hard starting when hot. To test the engine compression: the wrench counter-clockwise to remove the spark plug (Fig. 1 & 2). Fig. 1 Fig. 2 battery slot.
  • Page 17 GENERAL TROUBLESHOOTING Ignition System (See Figs. 5-6) deposits in the spark plug. The spark plug gap should be 0.026” ±0.002” (0.65±0.05 mm). Inspect the electrodes for wear and deposits (Fig. 5). Outer Electrode 0.026 in. (0.65 mm) Fig. 5 (Fig. 6). Press the start button to check if the spark plug sparks. WARNING Do not touch the metal part of the spark plug.
  • Page 18 GENERAL TROUBLESHOOTING Fig. 8 Fig. 9 blower. Remove the engine cover (Fig. 10). NOTE: When reinstalling the screws, make sure that the long screws 4 and 5 are installed near the fuel tank and the engine as shown in Fig. 10. Fig.
  • Page 19 GENERAL TROUBLESHOOTING Stop line Ground line Fig. 13 which they were removed. Fig. 14 15). Insert the screw (with the ground line) into the position hole of the ignition coil. Spacer Fig. 15...
  • Page 20 GENERAL TROUBLESHOOTING 16). Insert the other screw. Then apply the thread-locking glue and then tighten the two screws. Fig. 16 remove the feeler gauge. Recheck to ensure the gap is 0.012-0.015 in. (0.30-0.40 mm). Feeler Gauge Magnetic Pole Fig. 17 Fig.
  • Page 21 GENERAL TROUBLESHOOTING Flywheel Replacement (See Figs. 20-22) to 1/2 its original length. Ensure hooks are longer than screw rod . Insert hooks 22). Fig. 20 Fig. 21 Fig. 22...

  • Page 22: Air & Fuel System

    AIR & FUEL SYSTEM Air Filter Replacement (See Figs. 23-26) Air Filter Air Filter Cover Air Filter Knob Open Close Fig. 23 Fig. 24 NOTE: will decrease the chances of engine wear caused by dirt entering the engine. Fig. 25 Fig.
  • Page 23 RPM displayed on the tachometer to verify speed. Then turn the H screw slowly in the correct direction, and observe the RPM displayed on the Max speed NPTBL26A (With Blower Tube) About 7500-8000 RPM Fig. 29...
  • Page 24 AIR & FUEL SYSTEM the throttle trigger quickly to operate the blower at full throttle, and observe the RPM displayed on clockwise using the screwdriver. Observe the RPM displayed on the tachometer until it reaches about 3700 RPM. using the screwdriver. Observe the RPM displayed on the tachometer until it reaches about 3700 RPM.
  • Page 25 AIR & FUEL SYSTEM General Fuel Systems Operations (See Figs. 33-43) Carburetor Replacement Fig. 33 entering. The black tube is for fuel entering. The transparent is for fuel return (Fig. 34). Fig. 34 Fig. 35...
  • Page 26 AIR & FUEL SYSTEM removed. Align the holes on washer with the holes on carburetor (Fig. 36). Holes Fig. 36 second hole on the carburetor as shown (Fig. 38). Then tighten the 2 screws. Fig. 37 Fig. 38 return (Fig. 39). Fig.
  • Page 27 AIR & FUEL SYSTEM Fuel Tank Replacement condition (Fig. 41). Screw Anti-vibrating washers Fig. 40 Fig. 41 return. Fuel Return Tube (Transparent) Fuel Tube (Black) Fig. 42 removed. Insert the Fuel Tube Connect the fuel tubes with the carburetor. The black tube is for fuel entering.
  • Page 28 AIR & FUEL SYSTEM Exhaust System Service (See Fig. 44) WARNING Screws Fig. 44 NOTE: Do not allow the carbon deposit to fall into the cylinder when removing the buildup.

  • Page 29: Throttle And Starter System

    THROTTLE AND STARTER SYSTEM Disassembly, Inspection & Repair of Throttle and Starter System (See Figs. 45-58) Disassembly of Starter System (PCB Assembly Replacement) Fig. 45 NOTE: When re-assembling the throttle lever, make sure the position hole on the throttle lever is connected to the throttle rod.
  • Page 30 THROTTLE AND STARTER SYSTEM Stop Switch Cables Fig. 48 Terminals Fig. 49 ensure that terminals of the LED cable are connected securely. Replace the Motor anti-vibration washer. Fig. 50...
  • Page 31 THROTTLE AND STARTER SYSTEM nut to remove the blower tube (Fig. 51). Screws Fig. 51 Fig. 52 Fig. 53...
  • Page 32 THROTTLE AND STARTER SYSTEM Screws Fig. 54 Terminals of motor drive lines Fig. 55 which they were removed. the gear is broken, replace it (Fig. 56). Remove the ratchet wheel. Check the condition of the gear spring. If the spring is broken, replace it (Fig. 57). Ratchet Spring Wheel...
  • Page 33 THROTTLE AND STARTER SYSTEM Pawl Assembly Fig. 58...

  • Page 34: Nopull™ Starter System

    NOPULL STARTER SYSTEM Special troubleshooting instructions for No-Pull™ Start Button (See Figs. 59-67) Lift the start button cover and press the start button to start the electric motor. Release the start button after the electric motor started, the motor will stop (Fig. 59). NOTE: When the start button is kept pressed, the electric motor will run for about 5 seconds then it will stop automatically.
  • Page 35 NOPULL STARTER SYSTEM charged. starter part. Check the electric motor and the motor drive lines as below: Open the handle assembly and disconnect the male and female terminals of the motor drive lines (blue) circuit occurs in the motor drive lines of the handle. Terminals Fig.
  • Page 36 NOPULL STARTER SYSTEM F. If the battery indicator LED does not turn on, the possible causes are as below: 1) The microswitch is broken. Replace it. 2) The wiring harness of the microswitch has detached. Re-weld it. 3) There is failed contact in the battery connector to the PCB. Adjust the battery connector (Fig. 63). 4) Battery breaks without voltage output.
  • Page 37 NOPULL STARTER SYSTEM Terminals of the stop switch wiring harness Test the two pins Fig. 65 Fig. 66 B. Test the stop switch wiring harness of the engine (Fig. 67). If conduction fails, the possible causes are: 1) An open circuit in the connection position between the wiring harness of the engine and the 2) An open circuit in in the connection position between the wiring harness of the engine part and 3) There is a loose or failed connection between the wiring harness of the engine and the bullet terminals of the stop switch wiring harness.

  • Page 38: 26Cc 2-Cycle Engine

    26CC 2-CYCLE ENGINE Internal Engine Disassembly Inspection & Repair Engine Start Requirements and Inspection carburetor intake. Engine Disassembly and Inspection deposits. Adjust the spark plug gap 0.026”±0.002” (0.65±0.05mm). if leakage occurs. in place. 0.012-0.015 in. (0.30-0.40 mm).

  • Page 39: Manufacturer's Warranty And Contact

    No-Pull LIMITED WARRANTY ® We take pride in producing a high quality, durable product. This LawnMaster product carries a limited three (3) year warranty against defects in workmanship and materials from date of purchase under normal household use. This product carries a ninety (90) day warranty from the date of purchase when used for commercial or rental purposes.

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