LawnMaster NPTGSP2617A Service Manual
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LawnMaster NPTGSP2617A Service Manual

26cc 2-cycle grass trimmer
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SERVICE MANUAL
26cc 2-Cycle Grass Trimmer
NPTGSP2617A
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 NPTGSP2617A

  • Page 1 SERVICE MANUAL 26cc 2-Cycle Grass Trimmer NPTGSP2617A 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 7-11 WIRING DIAGRAM AND MANAGEMENT GENERAL TROUBLESHOOTING 13-21 AIR & FUEL SYSTEM 22-29 THROTTLE AND STARTER SYSTEM 30-34 NOPULL™ STARTER SYSTEM 35-38 26CC 2-CYCLE ENGINE GEAR HEAD AND SPOOL 40-42 MANUFACTURER'S WARRANTY AND CONTACT...

  • Page 3: Specifications

    SPECIFICATIONS UNIT SPECIFICATIONS Engine Engine Size 2-Stroke / Full Crank Engine Displacement Claimed / Rated 26cc / 25.4cm 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...
  • Page 4 SPECIFICATIONS Apply a thermostable screw-thread glue onto the Flywheel to crankshaft 89-133 10-15 (M8) and then tighten. Slide the corrugated washers onto the clutch bolts (M6X21.5). Apply a thermostable screw-thread glue onto the bolt thread head section. Install the bolts into 71-89 8-10 the clutch and tighten the bolts securing the clutch to...
  • Page 5 SPECIFICATIONS Apply a thermostable screw-thread glue into the two Flywheel cover to holes on crankcase. Tighten the 2 screws (M5X15) 53-64 6-7.2 crankcase 1.1-1.3 (for 10-12 Place the lower engine cover onto crankcase. Tighten 1*ST3.9X8) Lower engine cover the 3 screws (1*ST3.9X8, 2*M5X10) securing the assembly lower engine cover.

  • Page 6: General Safety Rules

    GENERAL SAFETY RULES SAFETY To protect the eyes from loose objects that could be thrown from the trimmer, always wear eye protection with side shields marked to comply with ANSI Z87.1 when operating the trimmer. Use only genuine manufacturer’s replacement parts for this product. Failure to do so may cause poor Scarfs, neckties, jewelry, jackets or other loose clothing and accessories should be avoided as they can be caught on or become entangled in the trimmer.

  • Page 7: Parts And Features

    PARTS AND FEATURES NPTGSP2617A EXPLODED VIEW...
  • Page 8 PARTS AND FEATURES NPTGSP2617A PARTS LIST Application Description Quantity Number 321001101 Cleva 26cc 2-Cycle Engine 321001102 Throttle-body & Starter Set 321001103 Throttle-body Set 321001104 Starter Set 2.2.2 321001106 Starter Switch Assembly 2.2.3 321001107 Stop Switch Set 2.2.4 321001108 PCB Assembly...
  • Page 9 PARTS AND FEATURES EXPLODED VIEW 26CC 2-CYCLE ENGINE...
  • Page 10 PARTS AND FEATURES 26CC 2-CYCLE ENGINE PART LIST Application Description Quantity Number 321001130 Spark Plug Cover 321001131 321001132 Upper Engine Cover 321001133 Logo 321001134 321002109 Cylinder Air Damper 321001136 321001137 321001138 Insulation Sheet 321001139 Spark Plug 321002110 Gasket 321002111 Ignition Coil Assembly 321002112 Positive Stop Switch Cable 321002113...
  • Page 11 PARTS AND FEATURES 321002127 Crankshaft Set 321002128 Piston Ring 321002129 Piston 321002130 Retainer Ring 321002131 Retainer Ring 321002132 Needle Bearing 321002133 Piston Pin 321002134 Crankcase Assembly 321002142 Flywheel 321002143 Flange Nut M8 311014125 Flat Key 321002145 Clutch Assembly 321002146 Washer 321002147 Corrugated Washer 321002148...

  • Page 12: Wiring Diagram And Management

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

  • Page 13: 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 14 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 15 GENERAL TROUBLESHOOTING Spark plug electrode is wet. Dry the spark plug. Spark plug has carbon Remove the carbon deposit. deposit. Spark plug insulation is Replace the spark plug. broken. Spark plug gap is too big/ Adjust to 0.026”±0.002” (0.65±0.05 mm). small.
  • Page 16 GENERAL TROUBLESHOOTING Incorrect carburetor Re-adjust the carburetor. adjustment. The carburetor has an air Replace or re-tighten. leakage. No load speed is not stable/consistent. Fuel tube is broken. Replace. Crankcase washer has air Replace. leakage. Fuel seal has air leakage. Replace. Idle speed is too high.
  • Page 17 GENERAL TROUBLESHOOTING Engine Compression (See Figs. 1-3) 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. 2). Fig. 1 Fig. 2 Place the choke lever in the RUN position. Engage the throttle safety and throttle trigger together to open the throttle and the choke lever in the on position.
  • Page 18 GENERAL TROUBLESHOOTING the carbon deposit in the spark plug. The spark plug gap should be 0.65±0.05mm. Inspect the electrodes for wear and deposits (Fig. 7). (Fig. 8). in. (0.30-0.40 mm) as instructed in step 3 of the Ignition Coil Replacement section (Fig. 9). Feeler Gauge Outer Electrode 0.026 in.
  • Page 19 GENERAL TROUBLESHOOTING Clutch Replacement (See Figs. 12-18) Bolts Fig. 12 Fig. 13 Flat Washers Fig. 14 Fig. 15 washers into the clutch, with the side of the clutch marked with the direction of rotation facing upwards (Fig. 16). Corrugated Washers Fig.
  • Page 20 GENERAL TROUBLESHOOTING for 3-5 screw threads and then re-install the clutch (Fig. 17 & 18). Fig. 17 Fig. 18 Flywheel (Rotor) Replacement (See Figs. 19-22) Fig. 19 Fig. 20 counter-clockwise till it is 1/4 to 1/2 its length through. Ensure screw rods are protruded longer than screw rod .
  • Page 21 GENERAL TROUBLESHOOTING Fig. 21 Fig. 22...

  • Page 22: Air & Fuel System

    AIR & FUEL SYSTEM Air Filter Replacement (See Figs. 23-26) Air Filter Cover Air Filter Cover Air Filter Air Filter Knob Fig. 23 Fig. 24 correctly 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 NPTGSP2617A About 9000-9300RPM...
  • Page 24 AIR & FUEL SYSTEM CLOCK SET RESET Fig. 30 the throttle trigger quickly to operate the trimmer at full throttle, and observe the RPM displayed on CLOCK SET RESET Fig. 31 clockwise using the screwdriver. Observe the RPM displayed on the tachometer until it reaches about 4000 RPM.
  • Page 25 AIR & FUEL SYSTEM again. Make sure they are correct (Fig. 33). CLOCK SET CLOCK SET RESET RESET Fig. 33 General Fuel Systems Operations (See Figs. 34-50) Carburetor Replacement Fig. 34 Fig. 35 Fig. 36 entering. The black tube is for fuel entering. The transparent is for fuel return (Fig. 37). Fuel Tube (Black) Fuel Return Tube (Transparent)
  • Page 26 AIR & FUEL SYSTEM necessary. Place the washer correctly with the hole upwards. Align the hole on washer with the hole on carburetor mount (Fig. 38 & 39). NOTE: were removed. Carburetor washer with hole upwards Fig. 38 Fig. 39 Fig.
  • Page 27 AIR & FUEL SYSTEM replace if needed. (Fig. 42). Fig. 42 Fuel Tank Replacement screwdriver (Fig. 43 & 44). Fig. 43 Fig. 44 46). Fig. 45 Fig. 46 NOTE: If only replacing the fuel tank, do not remove the carburetor. Just remove the fuel tubes from the carburetor.
  • Page 28 AIR & FUEL SYSTEM Fig. 47 Fig. 48 Fig. 49 NOTE: Insert the Fuel Tube Connect the fuel tubes with the carburetor. The black tube is for fuel entering. The transparent is for fuel return. The fuel tubes should be connected to the turning position as shown (Fig. 50). NOTE: Do not damage or fold the fuel tubes.
  • Page 29 AIR & FUEL SYSTEM Exhaust System Service (See Figs. 51-54) Fig. 51 Fig. 52 NOTE: Do not allow the carbon deposit to fall into the cylinder when removing the buildup (Fig. 54). Fig. 53 Fig. 54...

  • Page 30: Throttle And Starter System

    THROTTLE AND STARTER SYSTEM Disassembly, Inspection & Repair of Throttle and Starter System (See Figs. 55-74) cover). Then remove the right cover of the main handle (Fig. 55 & 56). Fig. 55 Fig. 56 starter cover plate. Then remove the throttle safety and the torsional spring. Keep them properly for reassembly (Fig.
  • Page 31 THROTTLE AND STARTER SYSTEM 59). Throttle Safety Microswitch Assembly Throttle Lever Fig. 59 lines (blue). Remove the motor drive lines of the handle part from the corrugated pipe. Remove the PCB assembly by pulling it out of its slot (Fig. 60 & 61). Microswitch Wiring Harness Motor Drive...
  • Page 32 THROTTLE AND STARTER SYSTEM Fig. 64 ensure that terminals of the LED cable are connected in place (Fig. 65). Fig. 65 handle cover with the slots of the two rubbers on the shaft, and align the hole on the handle cover with the hole on the shaft as shown in Fig.
  • Page 33 THROTTLE AND STARTER SYSTEM Fig. 68 torsional spring with the long end upwards as shown (Fig. 69). Make sure the throttle safety and the torsional spring are installed into place (Fig. 70). Install the electric starter cover plate. Torsional Spring Fig.
  • Page 34 THROTTLE AND STARTER SYSTEM the engine cover. the corrugated pipe buckle must be connected tightly, without any warp or twist. Fig. 73 Fig. 74...

  • Page 35: Nopull™ Starter System

    NOPULL STARTER SYSTEM Special troubleshooting instructions for No-Pull™ Start Button (See Figs. 75-82) Starting Operation Lift the start button cover and press the start button to start the electric motor. Release the start button to stop the electric motor (Fig. 75). NOTE: When the start button remains pressed, the electric motor will run for about 5 seconds then it will stop automatically.
  • Page 36 NOPULL STARTER SYSTEM charged. Check the electric motor and the motor drive lines as below: Open the corrugated pipe buckle and disconnect the male and female terminals of the motor drive the short circuit occurs in the motor drive lines of the handle. Terminals of Black (-) motor drive...
  • Page 37 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. 79).
  • Page 38 NOPULL STARTER SYSTEM male and female terminals in the corrugated pipe buckle; 3). The stop switch has broken. Fig. 81 B. Test the stop switch wiring harness of the engine (Fig. 82). If conduction fails, the possible causes are: 1). An open circuit in the connection position between the wiring harness of the engine and the ignition coil;...

  • Page 39: 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 (0.65±0.05mm). motor is broken; test if the wires are in good condition and the gears are in working order. if leakage occurs.

  • Page 40: Gear Head And Spool

    GEAR HEAD AND SPOOL Gear Head (See Fig. 83) The gear head of the straight shaft grass trimmer has a left-hand rotation (Fig. 83). The screw thread Fig. 83 Trimmer Head Replacement - Rapid Reload Spool (See Fig. 84) trimmer head clockwise to remove (Fig. 84). head counter-clockwise to install.
  • Page 41 GEAR HEAD AND SPOOL Ⅱ Locking tabs Ⅰ on the trimmer head housing Fig. 85 Fig. 86 the locking tabs on the trimmer head housing as shown. Then press the locking tabs and push the trimmer head cover onto the trimmer head housing. Make sure they are secured tightly (Fig. 87). Mounting Hole Ⅱ...
  • Page 42 GEAR HEAD AND SPOOL Fig. 88 Fig. 89 protruding from each side. necessary. Fig. 90...

  • Page 43: 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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