12" Saw Chain for Stihl 3670-005-0064/3670 005 0064

If you need a replacement 12-inch chain for a Stihl setup using the listed OEM references, this product is intended as a match for those specific chain part numbers. It replaces Stihl 71PM3-64 / 71PM3 64 and Stihl 3670-005-0064 / 3670 005 0064, and the package includes 2 pieces of 12-inch chain.

Will this chain fit your saw?

The easiest way to confirm fitment is to match the information on your current bar and chain rather than going by saw brand alone. Chains can vary even when two saws use the same bar length, so a 12-inch label by itself is not enough for a perfect match.

Check these four points:

• Bar length: this chain is for a 12-inch bar
• Pitch: confirm the pitch marking on your current chain or bar
• Gauge: confirm the gauge marking on your current chain or bar
• Drive-link count: match the exact drive-link count from your existing chain

For this listing, the confirmed replacement references are:

• Stihl 71PM3-64 / 71PM3 64
• Stihl 3670-005-0064 / 3670 005 0064

If your current chain or your owner’s manual lists either of those part numbers, this chain is the correct replacement reference. If the bar is 12 inches but the pitch, gauge, or drive-link count differ from your existing chain, do not assume it will fit.

A quick way to verify is to inspect the side of the guide bar. Many bars are stamped with chain specifications. You can also look at the old chain packaging or manual if the markings on the saw are hard to read.

Replacing the chain

Before working on the saw, remove the battery or disconnect the spark plug, depending on your saw type, so it cannot start accidentally.

1. Let the saw cool completely and wear gloves before handling the old chain.
2. Remove the side cover, then back off the chain tension so the old chain can be lifted off the bar and sprocket.
3. Clean the bar groove, side cover area, and sprocket area before installing the new chain.
4. Fit the new chain around the sprocket and along the bar, making sure the cutter edges on the top of the bar face forward.
5. Reinstall the side cover and adjust tension until the chain sits snugly on the bar but can still be pulled around by hand.
6. Tighten the cover hardware securely, then recheck chain tension after a short test run.

A new chain can seat in quickly during the first few cuts, so it is normal to need a minor tension adjustment right away.

Keeping it sharp

A sharp chain cuts faster, straighter, and with less strain on the saw.

• Avoid contacting dirt, rocks, fencing, or the ground. Even brief contact can dull the cutters quickly.
• Keep proper chain tension. A chain that is too loose can derail, while one that is too tight creates excess heat and wear.
• Maintain bar oil flow and keep the bar groove clean. Good lubrication helps the chain run cooler and preserves both the chain and bar.

If you notice fine dust instead of chips, crooked cutting, or the need to force the saw through wood, the chain likely needs sharpening.

FAQ

Does this listing include one chain or more?

This package includes 2 pieces of 12-inch chain.

Is this chain enough to confirm fit if my saw uses a 12-inch bar?

Not by itself. You should also match the chain part number or verify the pitch, gauge, and drive-link count. This chain is intended to replace Stihl 71PM3-64 / 71PM3 64 and Stihl 3670-005-0064 / 3670 005 0064.