Stihl / Gas / Professional

Stihl MS 881 Magnum

Name: Stihl MS 881 Magnum
Brand: Stihl
Price: 2680 USD
Availability: InStock

70cc+ class

121.6cc

Engine

6.4 kW rated

36 in

Bar

cuts to about 34 in

21.4 lb

Weight

powerhead only, dry (no bar/chain/fuel)

~$2,680

approx., with 36" bar and chain

See it at Stihl

Price and availability on Stihl's site may differ.

The biggest production chainsaw you can buy new — 121.6cc and 8.6 hp — and owner threads are honest that almost nobody needs one. The people who do (slabbing-mill operators, storm crews facing 4-foot trunks, big-timber fallers) describe torque that simply doesn't stall: it pulls .404 chain on a 36-41 inch bar through hardwood at a steady, unhurried pace. Milling forums treat it as the safe choice over the 661 for 36-inch-plus slabs because it stays out of the RPM range where smaller saws cook themselves. The gripes are what you'd expect: 21.4 lbs before you add a 3-foot bar, a cold-start flooding ritual owners learn the hard way, an old-school carburetor (IntelliCarb, not M-Tronic) that may need seasonal retuning, and a price around $2,680 that makes used MS 880s tempting. Chain speed is modest, so it feels slow limbing — this is a torque instrument, not a firewood saw.

Best for: Chainsaw-mill operators slabbing 36-inch-plus logs and pro crews that regularly face trunks too big for a 90cc saw.

Specifications

Engine class: 70cc+ class (by displacement)
Engine: 121.6 cc
Rated power: 6.4 kW
Bar length: 36 in
Bar range: 21-41 in
Single-pass cut: about 34 in (bar minus 2)
Chain: .404" pitch / .063" gauge (46 RS)
Weight: 21.4 lb, powerhead only, dry (no bar/chain/fuel)
Power type: Gas
Use case: Professional
Warranty: 1-year consumer / 3-month professional (Stihl policy from Jan 1, 2026)
Model: MS 881

Manufacturer figures except the engine class and single-pass cut, which are derived here. What each spec means

121.6cc — the largest saw sold new
8.6 hp of stall-proof milling torque
Runs bars up to 41 inches

What owners like

Highest displacement and power of any production saw sold new — 121.6cc / 8.6 hp
Torque delivery that holds chain speed with a 36-inch bar fully buried, which is why milling forums default to it
Rated for guide bars up to 41 inches — handles wood nothing else in the catalog can
HD2 filtration and heavy-duty build made for hours-long milling sessions
Simple carbureted two-stroke — no engine electronics to fail, and any saw shop can rebuild it

Common complaints

21.4 lb powerhead — closer to 30 lbs run-ready with a long bar, brutal for anything but bucking and milling
Around $2,680, typically before adding the long bar and ripping chain most buyers want it for
No M-Tronic — the IntelliCarb still needs manual tuning, and owners report a fussy cold-start routine
Modest chain speed makes it feel sluggish in small wood; total overkill under 30-inch timber
1-year consumer / 3-month commercial warranty is thin for a $2,700 professional tool

Questions owners ask

Who actually needs an MS 881?

Slabbing-mill operators working 36-inch-plus logs, big-timber fallers, and storm crews facing four-foot trunks — and owner threads are honest that almost nobody else does. Under 30-inch wood it's total overkill: the modest chain speed makes it feel sluggish in small timber, and you're hauling mass you never use.

Does the MS 881 have M-Tronic auto-tuning?

No — unusually for a modern Stihl pro saw, it runs an IntelliCarb that still needs manual tuning, and owners report a fussy cold-start routine. The upside of staying carbureted: no engine electronics to fail, and any competent saw shop can rebuild it.

How heavy is it in real use?

The powerhead alone is 21.4 pounds dry; hang a long bar and chain and add fuel, and you're closer to 30 pounds run-ready. That's brutal for anything except bucking and milling, where the saw rests in the cut — this is not a saw you limb with.

What chain and bars does it run?

Heavy .404-inch pitch, .063 gauge chain, with guide bars rated up to 41 inches — capacities nothing else in the current catalog matches. Note that most buyers also need to budget for the long bar and ripping chain on top of the roughly $2,680 saw, since milling setups rarely use the stock 36-inch combo as-is.

Will it stall when a 36-inch bar is fully buried?

That's the one thing it's built not to do. The 121.6cc engine's torque delivery holds chain speed with the bar completely buried, which is precisely why milling forums default to it — an 8.6 hp two-stroke that grinds through wide slabs all day rather than bogging and recovering.