MS440 Chainsaw Crankshaft & Connecting Rod Assembly

MS440 chainsaw crankshaft, flywheel side

MS440 Chainsaw Crankshaft & Connecting Rod Assembly – Steele (Stihl MS 440) Chain Saw Parts

Dhs. 240.72

MS440 Chainsaw Crankshaft and Connecting Rod Assembly

This MS440 chainsaw crankshaft is a replacement crankshaft and connecting rod assembly for the MS440 chainsaw (the Stihl MS 440, listed by the supplier as "Steele"). It comes as one assembled part, with the crankshaft, flywheel webs and connecting rod together, as shown in the product photos. Easy Life Markets sells it for chainsaw owners and small engine repair shops rebuilding the bottom end of this two-stroke saw.

A chainsaw engine works hard at high revs, and the crankshaft and connecting rod carry all of that load. If a saw has seized, run lean, or been run with too little oil in the fuel, the connecting rod bearings or crankshaft can be damaged. At that point, replacing the complete crank and rod assembly is usually the most reliable fix.

What Is Included

1 x crankshaft and connecting rod assembly

Bearings, seals, piston and gaskets are not listed as included. Check the photos and plan to buy those parts separately if needed.

Specifications

Product type: Chainsaw crankshaft and connecting rod assembly
Listed model: MS440
Engine type: Two-stroke, single cylinder, forced air cooling
Application: Petrol (gasoline) chainsaw engine
Quantity: 1 assembly
SKU: CJJT139526301AZ

Checking Fitment

This assembly is listed for the MS440. Some saws share engine parts with closely related models, but the crankshaft is a precise part, so please check before ordering:

Confirm your saw model on the model plate.
Compare the crankshaft with our photos: shaft lengths on the flywheel and clutch sides, threads, keyways and the shape of the crank webs.
Compare the connecting rod: small-end size and overall length.

If anything looks different, contact us with photos before you buy.

Signs the Crankshaft or Rod Needs Replacing

The engine has seized and the piston or cylinder is scored
Knocking or rattling from the bottom end
Play in the connecting rod big-end bearing when checked by hand
Wobbling flywheel or clutch side shaft
Damaged threads or keyways on the crankshaft ends

Rebuild Tips

Replacing a chainsaw crankshaft means splitting the crankcase, so it is a full engine rebuild. Many owners take this chance to replace:

Main bearings and crankshaft oil seals
Piston, rings and cylinder, if the saw seized
Crankcase and cylinder gaskets
Fuel lines and filter, if the seizure was caused by a lean mixture

Heat the crankcase halves as described in the service information to fit bearings, and use the correct tools to press the crankshaft into the bearings without damaging it. Pressure and vacuum test the crankcase after assembly to check for air leaks, which can cause a new engine to run lean.

Preventing Another Failure

Most chainsaw bottom-end failures come from running lean or low on oil. Always mix fuel and two-stroke oil at the ratio your saw's manufacturer specifies, use fresh fuel, keep the air filter clean, and have the carburetor adjusted correctly after the rebuild. Letting the saw warm up before cutting also helps.

A Note on Supplier Specifications

The supplier's listing also mentions a power rating and "aluminum alloy" material. These figures do not match what is normally expected for this model or for a steel crankshaft, so we have not included them in the specifications above. If you need exact dimensions, compare the photos with your old part or ask us before ordering.

Who This Part Is For

This crankshaft assembly suits small engine repair shops, arborists and landowners who rebuild their own saws, and anyone reviving an MS440 that has seized or developed bottom-end noise. Replacing the complete crank and rod assembly is usually quicker and more reliable than trying to repair a damaged rod bearing on an old crankshaft, and it gives the rebuilt engine a fresh start.

Common Questions

Is this a genuine Stihl part? No. It is a replacement part listed for the MS440 saw.

Are bearings included? Bearings and seals are not listed as included.

Buy the MS440 Chainsaw Crankshaft at Easy Life Markets

You can order this crankshaft and connecting rod assembly right here. The current price and availability are shown on this page. Please read our return and refund policy before buying.