Overview
This replacement 12” guide bar and chain set delivers OEM-equivalent fit and cutting performance for your chainsaw. Packaged together, the bar and chain are matched to ensure smooth tracking and consistent cuts. It is a cost-effective alternative when the factory parts are due for retirement.
Key specifications
- Bar length: 12”
- Chain pitch: 1/4”
- Gauge: .043”
- Drive links: 64DL
- Includes: guide bar and chain (matched set)
- Material: hardened alloy bar with chrome-plated chain
Compatibility
This combo is built to work with stihl 71PM3 64 DL Pole Prune MS150T MS and equivalent models that share the same bar-mount geometry. Confirm your saw’s model and year against the compatibility chart to ensure a proper fit, particularly if your saw has been updated with a different oiler setup.
Installation notes
Remove the side cover, slide the old bar off the studs, and clean any sawdust from the bar-mount area and oil port. Seat the new bar on the studs, loop the chain around the sprocket and bar nose, then hand-tighten the cover nuts. Adjust chain tension until the chain pulls away from the bar bottom about 1/8 inch and snaps back, then torque the nuts securely.
Common questions
Q: Will this 12 inch 3670 005 0064 bar and chain combo fit my Stihl MS 151 T C-E, and does it use the 71PM3 64 drive link chain?
Yes, this combo is made for setups using the Stihl 71PM3 chain with 64 drive links, 1/4” pitch, and .043” gauge, which includes the MS 151 T C-E and MS150T when equipped with a 12 inch bar. The key is matching all three specs—12” bar, 1/4” pitch, and .043” chain gauge—rather than going by bar length alone.
Q: I have a pole pruner that currently uses Stihl 71PM3 64 DL chain—can I use this 3670-005-0064 replacement bar and chain on it?
If your pole pruner is set up for the Stihl 71PM3 64 DL chain and a 12 inch bar, this replacement is the correct style to match that configuration. Before installing, confirm the existing bar mount and chain specs stamped on your current bar so the pitch, gauge, and drive link count all line up exactly.
Q: What should I check when installing this 12 inch 1/4 pitch bar and chain, and how tight should the chain be?
Make sure the chain is installed with the cutter edges facing forward on the top of the bar, then adjust tension so the chain sits snug in the bar groove but still pulls around by hand with gloves on. After a few minutes of cutting, recheck tension and confirm the bar oil is flowing, because a new chain on a new bar will usually stretch slightly during initial use.
