Stihl 018 Specifications

Stihl 018 Specifications

Stihl 018 Specifications for Stihl 018 chainsaw, Find the specs information for the Stihl chainsaw including engine, fuel ignition system and cutting attachments.

Stihl 018 Specifications Engine

STIHL single-cylinder two-stroke engine with special impregnated cylinder bore.

Displacement: 31.8 cm3

Bore: 38 mm

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Stroke: 28 mm (1.10 in)

Compression ratio: 9.5 :1

Engine power: 1.4 kW (1.9 bhp)

Max. torque: 1.5 Nm (1.1 lb.ft), at n = 5500 rpm

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Mean idle speed: 2,800 rpm

Main bearings: Two deep-groove ball bearings

Big end bearing: Cylinder rollers, (cageless)

Small end bearing: Needle cage

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Piston pin diameter: Ø 8 mm (0.3 in)

Connecting rod length: 51 mm (2 in)

Rewind starter: Pawl system

rope rotor: min. 1/2 turn

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Starter rope: 3.0 mm (0.12 in) diameter, 800 mm (31.5 in) long

Clutch: Centrifugal clutch without linings

Diameter: 65 mm (2.56 in)

Clutch engages at: 4,100 rpm

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Crankcase leakage test: at gauge pressure: 0,4 bar (5.8 psi), under vacuum: 0,4 bar (5.8 psi)

Stihl 018 Fuel System

Carburetor: Diaphragm carburetor

Standard setting: adjusting screw L: approx. 1 turn open

Carburetor leakage test at gauge pressure: 0.4 bar (5.8 psi)

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Fuel tank capacity: 0.25 l (0.53 US pt)

Octane number: min. 90 RON (USA/CAN: pump octane min. 87 unleaded)

Fuel mixture: Regular brand-name gasoline and two-stroke engine oil

Mix ratio: 50:1 with STIHL 50:1 two-stroke engine oil 25:1 with other brand-name, two-stroke, air-cooled engine oils

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Air filter: Felt element

No H screw. Maximum engine RPM is permanently set by fixed jet (not adjustable)
Carburetor with balanced idle system with only one adjusting screw (LD)

Stihl 018 Ignition System

Type: Electronic magneto ignition (breakerless) with integral trigger unit

Air gap: 0.15 – 0.30 mm (0.006-0.012 in)

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Ignition timing: 1.0 – 1.6 mm (0.04-0.063 in) B.T.D.C. at 8,000 rpm

Spark plug (suppressed): CHAMPION RCJ 6Y, BOSCH WSR 6 F

Electrode gap: 0.5 mm (0.020 in)

Spark plug thread: M14 x 1.25

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Length of thread: 9.5 mm (0.37 in)

Heat range: 200

Cutting Attachment

Guide bars: STIHL Rollomatic with nose sprocket

Bar tail: 3005

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Bar lengths: 30 and 35 cm (12 and 14 in)
Oilomatic chain: 3/8″ (9.32 mm) Picco-Micro Mini
Chain sprockets: 6-tooth spur sprocket for 3/8″ Picco pitch
Chain speed: 18.6 m/s (61 ft/sec) at 10,000 rpm (with 6-tooth 3/8″ P sprocket)
Chain lubrication: Speed-controlled reciprocating oil pump, no oil feed at idle speed
Oil tank capacity: 0.15 l (0.32 US pt)

Stihl 018 Special Accessories

For User STIHL repair kit 1130 900 5000
For Service Carburetor parts kit 1130 007 1060

Stihl 018 Specifications Tightening Torques

Plastoform screws are used for polymer components and “DG” screws for light metal components. These screws form a permanent thread when they are installed for the first time. They can be removed and installed as often as necessary without detrimentally affecting the strength of the screwed assembly, providing the specified tightening torque is observed. For this reason it is essential to use a torque wrench.

More Stihl 018 Specifications are in Carburetor Manuals HERE and a Stihl 018 chainsaw workshop manual HERE. Stihl Parts list HERE a chainsaw search (magnifier icon) at top and bottom of this page, as well as a chainsaw repair help question and answer page HERE.

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