§ Fitment Guide

Poulan 4620 chain size & replacement chart

The Poulan 4620 takes a .325" pitch, .050" gauge chain. Below: every factory bar length with its exact drive-link count, cross-referenced to Oregon part numbers, plus the OEM parts list.

Fitment matrix

Bar length	Pitch	Gauge	Drive links	Oregon chains	Bars / combos
13"	.325"	.050"	—	—	130MLBK041
15"	.325"	.050"	—	—	150MLBK041
16"	.325"	.050"	66	20BPX066G 20LGX066G 20LPX066X2 20LPX066G 95TXL066G H66	160MLBK041 160PXBK041 557505
18"	.325"	.050"	72	20BPX072G 20LGX072G 20LPX072X2 20LPX072G 95TXL072G H72	180GDBK041 180MLBK041 180PXBK041 180RNBK041 180VXLGK041 557504 36892
20"	.325"	.050"	78	20BPX078G 20LGX078G 20LPX078X2 20LPX078G H78T H78-21 H78	200PXBK041 37977PDQ 557503 37977

Source: Oregon part-finder, retrieved 2026-07-06. Part numbers link to the manufacturer's spec page. Always confirm drive-link count against your current chain before ordering.

Compatible chains in our shop

Saw Chains

Morocca 2PC 20" Chainsaw Replacement Chain

pitch .325 · gauge .050" · $34

How to confirm the fit

Read your bar. The pitch and gauge are stamped on the guide bar near the saw body — e.g. 3/8" LP .050".
Count drive links. Lay the old chain flat and count the teeth that ride inside the bar groove. This number must match exactly; length in inches is not enough.
Match all three. Pitch, gauge and drive-link count all have to agree with a row in the table above. Two of three is not a fit.

Measuring a chainsaw chain's gauge with a caliper

Watch: how to identify chain pitch and gauge

Oregon Products: Identifying Chain Pitch and Chain Gauge

Official video from Oregon Products, the manufacturer behind the cross-reference part numbers above.

Official Poulan resources

Poulan Pro manuals & IPL — owner's manual for the 4620, including tensioning and maintenance intervals.

FAQ

What size chain does a Poulan 4620 take?

The Poulan 4620 runs a .325" pitch, .050" gauge chain. Available bar lengths: 13", 15", 16", 18", 20". Match the drive-link count to your bar (see the table above).

How do I know which gauge my 4620 chain is?

Check the number stamped on your guide bar near the tail, or measure the drive-link thickness with calipers. Common gauges for the 4620 are .050".

Can I put a longer bar on my Poulan 4620?

Oregon lists 13", 15", 16", 18", 20" bars for the 4620. Stay within this range — a longer bar than the engine is rated for cuts slowly and accelerates wear.