Target Audience:
Professional loggers, arborists, and large-scale firewood cutters requiring maximum power and torque
Competitive Advantage:
One of the largest displacement chainsaw powerheads in the STIHL lineup, delivering high torque for long guide bars and heavy timber
Engine Design:
Air-cooled single-cylinder two-stroke
Ignition:
Electronic (breakerless) ignition
Lubrication:
Adjustable automatic chain oiler with worm-gear drive
Starting System:
Recoil starter with manual choke and decompression valve
Handle System:
Anti-vibration handle assembly for extended professional use
Coverage Areas:
Complete powerhead teardown and rebuild, engine overhaul, carburetor service, ignition, lubrication, and chain brake systems
Manual Type:
Workshop Service Repair Manual
Delivery Method:
Instant download after purchase
Page Count:
N/A - not specified in this manual
Compatibility:
Viewable on any device with a PDF reader (Windows, macOS, Android, iOS)
Searchability:
Fully text-searchable PDF with bookmarks to major sections
Engine:
Cylinder, piston, rings, crankcase, crankshaft, bearings, seals, and cooling fins
Fuel System:
Carburetor, fuel tank, fuel lines, fuel filter, and intake manifold
Ignition System:
Flywheel, ignition module, spark plug, and wiring harness
Starting System:
Recoil starter assembly, rope replacement, and decompression valve
Lubrication System:
Oil pump, worm gear, oil lines, and oil tank
Chain Brake:
Band, lever, and cover assembly service and adjustment
Clutch and Sprocket:
Clutch drum, needle bearing, and sprocket replacement
Handle and Anti-Vibration:
Handlebars, AV mounts, and throttle linkage
Cutting Attachment:
Guide bar, chain tensioner, and drive sprocket
Troubleshooting:
Hard starting, no start, stalling, idling faults, and power loss diagnosis
Engine Rebuild:
Top-end disassembly, piston replacement, and cylinder inspection
Carburetor Overhaul:
Disassembly, cleaning, metering lever and needle adjustment, and tuning
Ignition Service:
Air gap setting, spark testing, and module replacement
Lubrication Service:
Oil pump output testing, worm gear replacement, and oil line routing
Chain Brake Service:
Band inspection, lever adjustment, and function testing
Clutch Service:
Removal, drum and bearing inspection, and reassembly
Specifications:
Torque values, clearances, and wear limits
Illustrations:
Exploded views and step-by-step procedural diagrams
Adjustment Data:
Carburetor settings, chain tension, and ignition timing
Parts Information:
Component identification, part names, and assembly order
Skill Level:
Intermediate to advanced; requires metric hand tools and two-stroke service experience
Related Models:
Procedures apply to the 088 powerhead; details specific to other displacement models are not included
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Air-cooled single-cylinder two-stroke
Displacement:
122.6 cc (approx. 7.48 cu in)
Bore:
N/A - exact bore not specified in this manual
Stroke:
N/A - exact stroke not specified in this manual
Power Output:
Approx. 8.4 kW (11.3 hp) at 9,000 rpm
Fuel Type:
Gasoline and two-stroke oil mix
Carburetor:
Diaphragm-type carburetor with integrated fuel pump
Air Filter:
Replaceable main filter with pre-filter
Ignition:
Electronic ignition with flywheel magneto
Spark Plug:
Standard spark plug with factory-specified gap
Standard Transmission:
Centrifugal clutch with sprocket and chain drive
Clutch Engagement:
Automatic centrifugal engagement at high idle
Drive Sprocket:
Replaceable spur or rim sprocket
Chain Tensioning:
Side-access tensioner screw through sprocket cover
Lubrication:
Automatic adjustable chain oiler driven by worm gear
Bar Mounting:
Standard STIHL bar mount pattern for large powerheads
Optional Transmission:
N/A - single-speed direct drive only
Length:
N/A - powerhead-only dimension varies with bar length; not specified in this manual
Guide Bar Length (typical):
42 to 150 cm (17 to 59 in), depending on application
Wheelbase:
N/A - not applicable to handheld chainsaw
Width (powerhead):
N/A - not specified in this manual
Curb Weight:
N/A - empty mass varies by configuration; powerhead approx. 10.5 kg (23 lb), exact figure not specified in this manual
Dry Weight (powerhead):
Approx. 10.5 kg (23.1 lb), varies with bar and chain
Chain Brake:
Inertia and manual chain brake with front handguard actuation
Anti-Vibration:
Anti-vibration mounts reduce operator fatigue
Throttle Lockout:
Throttle trigger lockout prevents accidental acceleration
Kickback Protection:
Reduced-kickback guide bar and low-kickback chain available
Decompression Valve:
Decompression valve reduces force needed to start
Muffler:
Spark-arresting muffler meeting applicable regulations
Crash Ratings:
N/A - chainsaws are not crash-tested
Ignition:
Electronic (breakerless) ignition with fixed timing
Carburetor:
Diaphragm carburetor with built-in fuel pump
Fuel Delivery:
Impulse-driven fuel pump and metering system
Starting:
Recoil start with manual choke and decompression valve
Chain Lubrication:
Automatic adjustable oil pump
Handles:
Anti-vibration front and rear handles
Infotainment:
N/A - no infotainment system on this equipment
Driver Assistance:
N/A - no electronic driver assistance systems
Air Filter:
Clean before each use; replace when damaged or clogged
Spark Plug:
Inspect and clean periodically; replace as needed
Fuel Filter:
Replace at regular service intervals
Chain Tension:
Check before each use and adjust as needed
Chain Lubrication:
Check oil flow before each use
Fuel Mix:
Gasoline with two-stroke oil at the ratio specified for the model
Chain Oil:
STIHL chain oil or equivalent tackified bar-and-chain lubricant
Capacity:
N/A - tank capacities not specified in this manual
Known Issues / Wear Items
Common Wear Items:
Starter rope, sprocket, clutch drum, bar, chain, air filter, and spark plug
Common Faults:
Carburetor diaphragm hardening, clogged fuel filter, worn piston rings, and oil pump wear
Periodic Checks:
Cylinder cooling fins, muffler, and anti-vibration mounts
