Fitment first · Trimmer · SKU B0D41MVR7M

18 Inch Replacement Chainsaw Blade Bar

18 Inch Replacement Chainsaw Blade Bar For EGO AK1800 CS1800 CS1803 CS1804 18" Chain Saw, For RYOBI RY3818 For CRAFTSMAN CMXGZAM700127 CMXGZAM700120

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Compatibility checkpoint

Verify this before you buy

3 listed model matches
1 Match the machine model

Compare the model printed on your trimmer label with the fitment list below.

2 Confirm the line and spool spec

bar & chain

3 Check the part code

Match part B0D41MVR7M or ASIN B0D41MVR7M against the listing and your old part.

Listed model matches
EGO AK1800 CS1800 CS1803 CS1804 18" Chain SawRYOBI RY3818CRAFTSMAN CMXGZAM700127 CMXGZAM700120
Equipment brandRyobi, Craftsman, EGO
ReplacesB0D41MVR7M
Spool typebar & chain
CategoryTrimmer
ConditionNew aftermarket replacement

Overview

This 18” bar and chain combo provides everything needed to restore a chainsaw’s cutting system in one purchase. Running a new chain on a worn bar (or vice versa) accelerates wear on both components. Replacing them together ensures matched tolerances, smooth tracking, and consistent oil distribution from the start.

Key specifications

  • 18” guide bar and chain combo
  • Matched bar and chain for optimal tracking
  • Low-kickback design for safer operation

Compatibility

This combo set is designed for EGO chainsaws as listed above. Verify bar length, pitch, gauge, and drive link count match your saw’s requirements before purchasing.

Installation notes

Remove the side cover and old bar assembly. Clean the mounting area and oil port thoroughly. Mount the new bar, loop the chain around the drive sprocket with the cutters facing the correct direction, and set initial tension. Run the saw for 30 seconds, then re-tension the chain once it warms up.

Common questions

Q: Will this 18 inch replacement bar fit my EGO CS1804, or is it only for the CS1800?

Yes, this bar is made to fit the EGO AK1800, CS1800, CS1803, and CS1804 18” chain saw models. It is also listed for RYOBI RY3818 and CRAFTSMAN CMXGZAM700127 / CMXGZAM700120, so it’s important to match your exact saw model before installing.

Q: Can I use my original chain from my RYOBI RY3818 with this replacement bar?

If your original chain is the correct 18” chain specified for the RY3818 bar setup, it should work with this replacement bar. Before reuse, check that the chain fits the bar groove properly and that the drive links seat correctly on the sprocket and along the bar.

Q: What should I check when installing this bar on a CRAFTSMAN CMXGZAM700120 chain saw?

Make sure the bar slot, chain tensioner hole, and chain direction are all aligned correctly during installation. After mounting, set proper chain tension so the chain lifts slightly from the bar but still snaps back into place, then keep the bar groove and oiling hole clean to help reduce wear.

Compatibility

This page lists compatible equipment gathered from the product fitment data. Always confirm the model number stamped on your machine before ordering.

EGO AK1800 CS1800 CS1803 CS1804 18" Chain SawRYOBI RY3818CRAFTSMAN CMXGZAM700127 CMXGZAM700120

Not sure which spool you need? See our guide: How to wind a trimmer spool or How to measure your old spool.

Before you buy — how to verify fitment

  1. Find your trimmer model number. It's usually on a label on the motor housing, battery slot, or lower shaft.
  2. Check spool compatibility. Compare the model number with the compatibility list above.
  3. Verify line gauge. Confirm the line thickness matches what your trimmer head requires by checking your manual or the old spool.
  4. Inspect the spool housing. Make sure the spool diameter, cap, spring post, and feed style match your trimmer head.

Frequently asked questions

How do I know this spool fits my trimmer?

Check your trimmer model number against the compatibility list above. Then verify the line gauge (.065, .080, .095) matches what your trimmer head requires — it's usually printed on the spool cap or in the manual.

Can I rewind a pre-wound spool?

Yes. Once the factory line runs out, you can rewind the spool with bulk trimmer line of the same gauge. Pre-wound spools just save time on the first load.

How often should I replace the spool?

Replace the spool when the line no longer feeds properly, the spring loses tension, or the spool body is cracked. Under normal weekend use, a spool lasts 2–4 refills before the housing wears out.

What gauge trimmer line should I use?

Match the gauge to your trimmer's power: .065" for light-duty electric trimmers, .080" for mid-range cordless, and .095" for gas-powered or heavy-duty models. Using too thick a line can stall the motor.

Where to buy

This part is available through Amazon with free returns on most orders. Use the fitment details above to compare your model, old part number, and physical specs before ordering.

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