Stihl MS 291 Operator Manual
Stihl MS 291 operator manual for the MS 291 chainsaw. PDF download operator instructions on how to use and maintain the Stihl MS 291 (MS291) chainsaw. Clear and concise with easy to understand diagrams detailing the safety, operating, maintaining and storing of the chainsaw.
Stihl MS 291 Chainsaw Operator Manual Contents
Safety, cutting attachment, bar and chain, fuel, oil, chain brake, stopping/starting engine, adjusting carburetor, air filter, engine management, spark plug, chain sprocket, sharpening the chain, maintenance and care, specifications.
This is the Stihl MS 291 User Guide, owner manual, instructions.
More information for the service and repair of the Stihl MS 291 chainsaw can be found in any service workshop manual, parts list, carburetor manual and any technical notes available for PDF download or online viewing on this website. Also check out any questions and answers, articles or the full specifications pages for the MS 291 chainsaw.
Adjusting Stihl MS 291 Carburetor
Stihl MS 291 chainsaw carburetor guide- The carburetor has been factory adjusted to provide the optimal engine air/fuel flow. Instructions for standard settings to adjust the idling screw, turning either clockwise or counter clockwise. Learn how to set the idling screw correctly if the engine is cutting out or idling incorrectly. Learn how to check the spark plug for a good electrical spark, cleaning or replacing if required. Air filter cleaning and replacement is described in the operator manual. Detailed carburetor PDF manuals are available from this website.
Stihl MS 291 Chainsaw Specifications
Engine
Single cylinder two-stroke engine
DISPLACEMENT: 3.39 cu. in. (55.5 cm3)
Bore: 1.85 in. (47.0 mm)
Stroke: 1.26 in. (32 mm)
ENGINE POWER: 3.8 hp (2.8 kW) at 9,500 rpm
Idle speed: 2800 rpm
Maximum permissible engine speed with guide bar and chain: 13,000 rpm
Magneto ignition system: Electronic (breakerless)
Spark plug (resistor type): Bosch WSR 6 F, NGK BPMR 7 A
Electrode gap: 0.02 in (0.5 mm)
All position diaphragm rotor with an integral fuel pump
Fuel capacity: 16.9 fl.oz (0.50 l)
Speed-controlled oil pump with reciprocating piston
Oil tank capacity: 8.1 fl.oz (0.24 l)
Weight (without bar and chain): 12.3 lbs. (5.6 kg)
MS 291 Cutting attachments
Rollomatic E guide bars
Reduced kickback STIHL guide bars (with green label)
Bar lengths: 40, 45, 50 cm (16, 18, 20 in.)
Pitch: .325″ (8.25 mm)
Groove width: 1.6 mm (0.063 in.)
Sprocket nose: 11-tooth
Saw chain .325″
Low kickback STIHL saw chain (with green label)
Rapid Micro 3 (26 RM3) Type 3634
Pitch: .325″ (8.25 mm)
Drive link gauge: 1.6 mm (0.063 in)
Chain sprocket
7-tooth for .325″ (spur sprocket)
Replace spark plug with Bosch WSR 6 F or NGK BPMR 7 A
Stihl MS 291 Operator Manual PDF
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