The NEWTOP MS381 spare parts set is designed to maintain optimal cutting performance and mechanical reliability under demanding workloads. Every part, from the crankshaft to the cylinder, is crafted with 20CrMoTi alloy steel and processed using precise CNC and heat treatment technology to ensure exceptional endurance and balance. The cylinder’s ceramic and chrome-plating options allow users to tailor durability and cooling efficiency based on local working conditions.
The carburetor—manufactured using OEM-level processes shared with Walbro—ensures precise fuel delivery and smooth acceleration, while the saw chain and guide bar are built from advanced German alloy steel, providing outstanding cutting precision and longevity. Suitable for professional forestry, logging, and agricultural applications, the MS381 series demonstrates why NEWTOP remains a trusted outdoor power equipment company, delivering both performance and value across global markets.
| A1-11 | Crankcase | G1 | Fan Housing |
|---|---|---|---|
| A8 | Spline Screw | G6-7 | Rewind spring |
| A9 | Circlip | G8 | Rope Rotor |
| A10 | Grooved Ball Bearing | G14 | Segment |
| A11 | Grooved Ball Bearing | G9-11 | Pawl+Washer+Spring |
| A12 | Oil seal | G12 | Starter Grip |
| A13 | Oil seal | H | Tank Housing |
| A14 | Hose | H3 | Collar Screw |
| A14,A15 | Pickup Body | H5-6 | Tank Vent |
| A16 | Gasket | H7 | Filler Cap |
| A17 | Crankshaft | H9 | Hose |
| A18 | Woodruff key | H10 | Pickup Body |
| A19 | Needle Cage | H12 | Switch Shaft |
| A20 | Filler Cap | H14 | Contact Spring |
| B1-5 | Cylinder With Piston | H18 | Throttle trigger |
| B2 | Piston | H19 | trigger interlock |
| B3 | Piston Ring | H20 | Throttle Rod |
| B4 | Piston Pin | H21 | Torsion Spring |
| B5 | Snap Ring | H23 | Pan Head Self-Tapping Screw |
| B6 | Cylinder Gasket | H24 | Handle Molding |
| B8 | Spline Screw | H25 | Washer |
| B9 | Spark Plug | J1 | Carburetor Bing |
| B10 | Exhaust Gasket | J3 | Grommet |
| B11 | Hose Clip | J4-10 | Air Filter, wire Mesh |
| B12 | Manifold | J12-13 | Handlebar |
| B13 | Sleeve | J14 | Pan Head Self-Tapping Screw |
| A16,B6,B10,D1 | Set Of Gaskets | J15 | Chain Sprocket Cover |
| C1-4 | Muffler Kit Standard | J16 | Bumper Strip |
| D1 | Gasket | J17 | Guard |
| D2 | Oil Pump | J18 | Collar Nut |
| D | Oil Pump Assy | M1 | Annular Buffer |
| D5 | Worm | M2 | Pan Head Self-Tapping Screw |
| D17 | Spline Screw | M3 | Plug |
| E1 | Washer | M4 | Plug |
| E2-4 | Clutch | M5 | Chain Catcher |
| E4 | Tension Spring | M6 | Self-Tapping Screw |
| E5 | Chain Sprocket | M7 | Annular Buffer |
| E6 | Spur Gear | M8 | Plug |
| E7 | Worm | M9 | Annular Buffer |
| E8 | Needle cage | M10 | Spline Screw |
| E10 | Brake Band | M11 | Retainer |
| E11 | Lever | M12 | Pan Head Screw |
| E16 | Lever | N1 | Collar screw |
| E17 | Sealing Washer | N2 | Spur Gear/Chain Adjusting Screw kit |
| E18 | Tension spring | N3 | O-Ring |
| E19 | Spline screw | N4 | Tensioner slide |
| E20 | Cover | N5 | Thrust Pad |
| E21 | Washer | N6 | Cover Plate |
| E22 | Circlip | N7 | Pan Head Screw |
| E23 | Washer | N8 | Support |
| E24 | E-Clip | N9 | Inner Side Plate |
| E25 | Clutch Drum | N10 | Bumper Spike |
| E28 | Rim Sprocket | N11 | Spline Screw |
| E29 | Hand Guard | N12 | Lock Nut |
| E30 | Spline Screw | N13-17 | Carburetor Box Cover |
| E33 | Spline Screw | N16-17 | Twist Lock |
| F1 | Flywheel | N19 | Shroud |
| F3-6,9-14 | Lgnition Coil complete | N21 | Collar Screw |
| G1-15 | Fan Housing With Rewind Starter | N22 | Ring |
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