12" STIHL 71PM3-64 Chain

This 12” STIHL 71PM3-64 chain is a replacement chain for select compact STIHL chainsaws and the STIHL HT 103 pole pruner. It is listed to fit STIHL MSA 120 C, MSA 140 C, MSA 160 C, MS 150 TC, MS 150 T C-E, MS 151 T C-E, and HT 103 models when equipped with a 12-inch bar.

Will this chain fit your saw?

The simplest way to confirm fitment is to match all four chain specs on your current setup:

• Bar length: 12”
• Pitch: match the pitch marked on your bar or current chain
• Gauge: match the gauge marked on your bar or current chain
• Drive-link count: 64

For this product page, the confirmed replacement chain is:

• STIHL 71PM3-64
• STIHL part number 3670-005-0064

The original listing states this chain fits these STIHL models:

• STIHL MSA 120 C
• STIHL MSA 140 C
• STIHL MSA 160 C
• STIHL MS 150 TC
• STIHL MS 150 T C-E
• STIHL MS 151 T C-E
• STIHL HT 103 Pole Pruner

Even if your saw is one of the models above, it is still smart to verify the bar length and drive-link count before ordering. Chainsaw model families can sometimes be used with different bar setups, and the correct chain must match the bar actually installed on your machine.

A quick check method:

1. Confirm your guide bar is 12 inches.
2. Look for the chain code on the old chain or the bar.
3. Verify your current chain has 64 drive links.
4. Cross-check against STIHL 71PM3-64 or 3670-005-0064.

If all of those match, this is the correct replacement chain for your setup.

Replacing the chain

Before working on any saw, make sure it cannot start accidentally. Wear gloves, because even a dull chain can cut.

1. Power off the saw and remove the battery or disconnect the spark plug, depending on the machine.
2. Loosen the side cover and back off the chain tension so the old chain can be removed from the bar and drive sprocket.
3. Clean the bar groove, oil hole, and sprocket area before installing the new chain.
4. Fit the new 71PM3-64 chain around the drive sprocket and along the guide bar, making sure the cutter direction is correct.
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. After a short test run, recheck chain tension and adjust again if needed.

A new chain can loosen slightly as it seats in, so a second tension check is normal and recommended.

Keeping it sharp

A sharp chain cuts faster, puts less strain on the saw, and helps you work more safely.

• Keep the chain out of dirt. Contact with soil, rocks, or hidden debris will dull cutting edges very quickly.
• Maintain proper chain tension. A chain that is too loose can derail; one that is too tight increases wear on the bar and drive components.
• Keep bar oil flowing properly and check the bar regularly for buildup in the groove and oil ports.

If cutting performance drops and the saw starts producing fine dust instead of chips, it is usually time to sharpen or replace the chain.

FAQ

Does this chain fit every 12-inch STIHL chainsaw?
No. A 12-inch bar alone is not enough to confirm fit. You also need the correct pitch, gauge, and 64 drive links, or a direct match to STIHL 71PM3-64 / 3670-005-0064.

Which STIHL part numbers does this replace?
This chain replaces STIHL 71PM3-64 and STIHL 3670-005-0064.