Poulan Pro 18-Inch Saw Chain (Fitment Guide)
For a Poulan Pro saw with an 18-inch bar, choose a chain by matching the saw model and bar markings, not bar length alone. Confirm pitch, gauge, and drive-link count, then follow that model’s manual for chain tension, fuel mix, and service settings. If a marking conflicts or is unreadable, stop and verify before buying or fitting a chain.
Do you like a clean cut that moves through wood without forcing the saw? A chain that burns the cut or makes fine dust may be dull, but a replacement that does not match the bar can create a different problem. I check the saw’s model and the bar’s stamp first, then confirm all three chain measurements before installation.
“18-inch” describes the bar’s nominal length. It does not identify one universal Poulan Pro chain. Some setups use 3/8-inch low-profile pitch, and .050-inch gauge with 62 drive links is possible on some bars, but neither combination applies to every saw. Use the markings and the exact model manual to confirm.
Equipment Setup and Safety Preparation
This section explains how to identify the right chain and prepare the saw before fitting it. A compatible chain must match the bar and saw setup, while safe installation also depends on the manual’s directions for tension, starting, and inspection. Do not use bar length alone as a fitment number.
Identify the chain from the saw and bar
The pitch is the spacing of the chain’s rivets, measured across three rivets and divided by two. The gauge is the thickness of the drive links that sit inside the bar groove. Drive-link count is the number of links that run in that groove. All three must match.
Look for information stamped on the guide bar, printed on the chain package, or listed in the saw’s manual. The saw model number is usually on a label on the body; record it exactly, including letters and suffixes. If the bar stamp is worn, use the manual or contact a Poulan Pro service source with the model and bar details.
| What to confirm | Where to check | What must match |
|---|---|---|
| Approved bar length | Saw manual and bar marking | The manual must allow an 18-inch bar for that model |
| Pitch | Bar, chain, manual, or chain packaging | Same pitch on replacement chain and bar setup |
| Gauge | Bar, manual, or chain packaging | Replacement drive-link thickness fits the bar groove |
| Drive-link count | Existing chain or manual | Exact count for that bar and setup |
| Fuel mix | Exact model manual | Use the listed gasoline-to-oil ratio |
| Service settings | Exact model service information | Use specified idle, maximum speed, and depth-gauge settings |
Never assume that engine size establishes chain fitment. Nor does a chain fit just because it is sold as an “18-inch chain.” If any one of the three chain dimensions is wrong, the chain may not seat or tension properly.
Prepare the saw and work area
Before removing a cover or handling the chain, switch off the engine and let hot parts cool. Wear a helmet with face and eye protection, hearing protection, chainsaw-resistant leg protection, gloves, and sturdy boots. Clear bystanders, check for overhead hazards, and plan an escape route before cutting.
Inspect the chain brake, throttle lockout, chain catcher, bar, and visible fasteners. Do not use the saw if a safety part is missing or damaged. Check the bar groove and oil holes for packed debris, and make sure the chain oil tank contains dedicated bar-and-chain oil. Oil flow depends on the saw model and, where fitted, its adjustment.
Fit and tension the replacement chain
With the engine off and the brake engaged as directed by the manual, remove the side cover. Keep track of the cover hardware. Place the chain around the drive sprocket and along the bar, making sure the drive links sit in the groove.
The cutters on the top of the bar must face forward, toward the bar nose. If the chain direction is unclear, use the diagram in the manual rather than guessing. Refit the cover, then tension the chain according to the model’s procedure. The chain should sit in the bar groove and move by hand when the engine is off, while remaining correctly engaged. Wear gloves when handling it.
I do not use a single tension measurement for every Poulan Pro model. Follow the manual’s method and any stated clearance. After tightening the bar nuts as specified, rotate the chain by hand to check for binding. Recheck tension after the first short period of use, following the manual. Never adjust a running or hot chain.
Illustrative fitment checks: A bar stamp that lists a particular pitch and gauge, paired with a manual that specifies the matching drive-link count, gives you the information needed to select a chain. If a replacement package lists the right bar length but a different gauge, it is not the right match. If the bar stamp and manual disagree, pause and confirm the correct bar and saw combination before proceeding.
Field Cutting and Landscaping Operation
Correct fitment is only the first step. Safe cutting depends on a sound chain, proper lubrication, and a stable work position. Start and operate the saw by the manufacturer’s instructions, keep the bar nose clear of the wood, and stop if the chain loosens, the saw binds, or lubrication appears to fail.
Start the saw using the model’s cold- or warm-start procedure, with the chain brake engaged and the saw stable on the ground as directed by its manual. Do not use a starting method that conflicts with the manufacturer’s instructions. Once running, check that oil is reaching the chain using the manual’s recommended check.
Maintain a firm stance and two-handed grip. Cut below shoulder height, and keep the upper quadrant of the bar nose away from the wood. Contact there can cause rapid rotational kickback toward the operator. A chain brake can reduce risk, but it cannot prevent every injury.
Do not force a dull chain through a cut. A sharp chain should cut without heavy pressure. If it produces fine dust, pulls to one side, or needs excessive force, stop and inspect the cutters and chain condition. Those signs can point to a dull or uneven chain, but also check for damage or other issues before resuming.
Stop the engine if the chain becomes loose, the saw binds, or oiling seems absent. Do not keep cutting in the hope that the problem will clear. Check the manual for safe inspection steps, then correct the cause before restarting.
Maintenance, Chain Sharpening, and Tuning
Regular checks help preserve cutting performance and reveal fitment or lubrication problems early. Use the chain maker’s directions for file diameter, filing angles, and depth-gauge clearance, and the saw manual for engine settings. These values vary by chain and saw, so a generic number can be wrong.
A file diameter is the size of the round file used to sharpen the cutter. The correct size depends on the chain specification; check the chain package, maker’s chart, or manual. Filing angle also varies. Do not assume that a familiar angle, such as 30 degrees, applies to every chain.
Secure the saw with the engine off. Use the specified file and guide, keep the file level as directed, and sharpen each cutter with consistent strokes. Check that left- and right-facing cutters remain similar in length and shape. If a cutter is badly damaged, or you cannot restore even cutting edges, replace the chain or have it serviced.
A depth gauge, often called a raker, controls how much wood each cutter can take. Too much clearance can make the chain grab more aggressively; too little can reduce cutting performance. Set it only to the chain maker’s specification with the proper gauge tool. Do not apply a generic depth setting.
Keep the bar groove and oil holes clear, and inspect the bar for wear as described in the manual. Check chain tension and lubrication before each use. Use dedicated bar-and-chain oil, not fuel or ordinary engine oil. If oil delivery is uncertain, stop and consult the model’s instructions rather than continuing to cut.
Fuel is also model-specific. Poulan Pro two-stroke saws require the gasoline and two-stroke oil mix listed in the exact model manual. Ratios vary by model and year, so do not assume 40:1 or 50:1. Never run straight gasoline in a two-stroke saw. Engine idle and maximum speeds also depend on model service specifications; avoid generic tuning values.
Shutdown, Storage, and Seasonal Care
After cutting, engage the chain brake, switch off the engine, and let the saw cool before cleaning or service. Remove debris, inspect the bar and chain, and check fasteners and the air filter as the manual directs. Store the saw and fuel according to the model’s instructions, not a guessed seasonal routine.
Clean around the bar, chain, sprocket cover, and oil openings without damaging parts. Look for a bent or cracked chain link, damaged cutters, excessive wear, and signs of poor lubrication. Retension only as directed, and never handle or adjust a hot chain.
For storage, follow the manual’s fuel and equipment instructions. Fuel handling and storage rules can differ by saw design and local requirements. Keep the saw away from ignition sources, and store it where children cannot reach it. Before the next use, repeat the fitment, safety, tension, and oil checks.
Quick fitment decision table
| Situation | Next step |
|---|---|
| You know only that the bar is 18 inches | Find the saw model and bar markings before ordering |
| Pitch and gauge are known, but link count is not | Check the manual or count drive links on the correct existing chain |
| Markings are unreadable | Use the exact model manual or ask a service source to confirm the bar and chain |
| Chain fits loosely, binds, or will not tension | Stop; recheck pitch, gauge, link count, assembly, and bar condition |
| Fuel ratio is unknown | Check the exact model manual before mixing or running fuel |
The practical rule is simple: match the saw-approved bar, then match pitch, gauge, and drive-link count. If you cannot verify all three, do not buy or install a chain based only on “Poulan Pro” and “18-inch.”
Frequently Asked Questions
These short answers cover the common fitment questions for an 18-inch Poulan Pro bar. The exact saw model and bar markings remain the deciding references, because chain size, fuel mix, and service settings can vary across models and years.
Can I buy any chain labeled 18 inches for my Poulan Pro?
No. Confirm pitch, gauge, and drive-link count against the bar and the exact model manual.
Is .050-inch gauge correct for every Poulan Pro 18-inch bar?
No. It is possible on some setups, but gauge must match the bar’s specification.
Does every 18-inch Poulan Pro chain use 62 drive links?
No. Sixty-two links are possible on some setups, not guaranteed. Verify the exact count for your bar.
Is 3/8-inch low-profile pitch universal on these saws?
No. Some 18-inch setups use it, but others may differ. Read the bar or manual.
Can engine displacement tell me which chain to buy?
No. Displacement does not establish chain fitment. Use the saw model and bar or chain specifications.
What file size and sharpening angle should I use?
Use the chain maker’s specification for that chain. File size and angles are not universal across every chain that fits an 18-inch bar.
What fuel ratio should I use?
Use the gasoline-to-oil ratio in the exact saw model’s manual. Do not assume 40:1 or 50:1.
Can I use engine oil in place of bar-and-chain oil?
Use dedicated bar-and-chain oil and follow the saw manual. Oil flow and adjustment vary by model.
What should I do if the replacement chain will not tension?
Stop and recheck pitch, gauge, drive-link count, chain direction, installation, and bar condition. Do not force the adjuster.
When should I stop cutting and inspect the chain?
Stop if it loosens, binds, seems poorly lubricated, or cuts unevenly. Switch off, let the saw cool, and inspect it using the manual’s procedure.
(This article was written by one of our staff writers, David Hensley. Visit our Meet the Team page.)
