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Description
99944200903 Speed-Feed 450 Trimmer Head - Fits Echo SRM-266, SRM-266S, SRM-266T, SRM-266U - 2 Pack Ver. 199944200903 Speed Feed 450 Trimmer Head Key Features 30 Second Reload: Engineered with "Speed Feed" technology that allows the spool to be reloaded without disassembly. Simply align the arrows, feed the line through, and twist the knob. High Capacity Spool: Designed for professional use, holding more line than standard manual heads to reduce downtime on large properties. Heavy Duty Bump Feed: Features a reinforced, high impact bump knob and
99944200903 Speed-Feed 450 Trimmer Head
Key Features
- 30-Second Reload: Engineered with "Speed-Feed" technology that allows the spool to be reloaded without disassembly. Simply align the arrows, feed the line through, and twist the knob.
- High-Capacity Spool: Designed for professional use, holding more line than standard manual heads to reduce downtime on large properties.
- Heavy-Duty Bump Feed: Features a reinforced, high-impact bump knob and specialized eyelets to withstand high-RPM contact with concrete and fencing.
- Universal Compatibility: Includes a set of adapter bushings and studs to fit a wide variety of straight-shaft and curved-shaft trimmers.
- Precision Balance: Manufactured to strict tolerances to reduce vibration, extending the life of the trimmer's gear head and reducing operator fatigue.
Replaces / Cross-Reference Part Numbers
- 99944200903
- X047000940
- 28820-08000
- 78890-21001
- 385-288
Compatibility & Fitment
This trimmer head is a standard upgrade for Echo and Shindaiwa professional units. Key compatible models include:
- Echo SRM Series: SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T.
- Echo High-Torque: SRM-2620, SRM-2620T, SRM-3020, SRM-3020T.
- Shindaiwa: T230, T231, T242, T2510, T260, T261, T270, T272, T282, T344.
- Other Brands: Fits select Stihl, Husqvarna, Maruyama, and RedMax straight-shaft trimmers using the included adapter kit.
When to Replace
- Worn-Through Bump Knob: The plastic on the bottom knob has worn down to the spring or internal metal, preventing the line from advancing.
- Grooved Eyelets: The metal eyelets (where the line exits) have developed deep notches, causing the trimmer line to break off inside the head.
- Stuck Mechanism: The internal ratcheting gear is stripped or melted due to line friction, making it impossible to reload.
- Excessive Vibration: The head is physically cracked or missing a piece, creating an imbalance that can damage the trimmer's driveshaft.
Installation & Loading Tips
- Left-Hand Threads: Most straight-shaft trimmers (like the SRM-266) use a counter-clockwise tightening direction. Spin the old head clockwise to remove it.
- Align the Arrows: To load, rotate the top knob until the arrows on the side of the knob line up with the eyelets.
- The 10-Foot Rule: Insert approximately 10–12 feet of .095" line through one eyelet and out the other. Pull it through until the lengths are even on both sides.
- Winding: Hold the trimmer head and twist the bottom disc (or knob) to pull the line into the spool. Do not wind it manually by opening the head unless there is a tangle.
- Recommended Line: For best results on Echo 266/280 models, use .095" or .105" professional round or square line.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 2306 reviews
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Product Reviews
★★★★★ 5
Better than expected, these are great looking and heavy duty
Size: 42inch Tall (NOT included wood planks), Color: Black
These are heavy duty, and just as pictured. They are beautiful.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Great value extra storage
Size: 42inch Tall (NOT included wood planks), Color: Black, Size: 42inch Tall (NOT included wood planks), Color: Black
This was a Great storage option for a corner where we had no cabinets, it has very stylish hardware Storage Space it’s quality built it fits well it’s very easy to install. It came with screws. All the hardware, I’m going to put white dishes on the shelves with my coffee bar.
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Reviewed in the United States on February 8, 2025
★★★★★ 5
Quality pipes for a good price
Size: 42inch Tall (NOT included wood planks), Color: Black
This item is just as described. It is the pipe fitting portion of a 3 shelf unit. You must buy your shelving separately once the rails have been installed. Purchasing the pieces this way was much more cost-effective than separately buying each part from the hardware store, and all the pieces were clean and ready to be mounted unlike the pieces from the hardware store. It was moderately difficult to hang, since you are trying to keep everything very level. I imagine the distance between each rail will be a factor in how easy this is to level. The difficulty may have also stemmed from the fact that we were mounting it in a small toilet room and had little room to maneuver during the installation process. Still, it is a good product and we are considering purchasing a second one for another location in our home.
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Reviewed in the United States on April 6, 2019
★★★★★ 4
Not real Black Iron, but works just as well
Size: 42inch Tall (NOT included wood planks), Color: Black
First, these parts that I got were not real Black Iron pipes like you would pick up at a hardware store, they are like furniture grade tubes for an IKEA shelving system. The thread would fit 3/4 pipe from like HD, but they are not the same, I know this because I just bought some of the pipe and parts for a small shelf right before ordering this. I should have known from the price, the real stuff is kind of pricey, but nicer. The elbows and T-connectors as well as the flanges seem more like galvanized steel painted black. HOWEVER, the end product is pretty nice and very versatile as to where you would want to put it. It is still pretty sturdy, and if screwed into a stud, I believe it would hold a lot of weight. The entire shelving system is painted black, so unlike Black Iron, it will not stain your hands black when handling it. Putting this together took about 30 min, the longest part was adjusting angles and lengths to get it flat and squared, but was not hard at all. This kit does NOT come with shelf boards, so length of that is up to you. It also came with mounting screws, but they are thin and I would suggest as your getting boards for shelves, also pick up some beefier screws, U used #12 - 1 1/4" wood screws with the sleeves for drywall and a little longer for securing it into a stud. All in all, this black pipe shelf looks nice, is nice and will work out great, just know, it is not the real Black Iron pipes and parts you would get from a hardware store, but the threads would fit if you wanted to add to this. I only knocked down one star because of this, and if I am going to buy more of these, I would prefer the real stuff and not go with this one.
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Reviewed in the United States on June 5, 2020
★★★★★ 5
Love these!!!
Size: 42inch Tall (NOT included wood planks), Color: Black
Super sturdy..looks excellent. Industrial and clean lines....lots of space for our kids bathroom. The wood does not come with it but was easy to get lowes. We actually added another shelf on the top bracket to make 4 shelves. They're nice and wide to fit baskets and organize things. For teenagers bathroom! My husband installed by himself and he isn't the handiest of guys but it it wasn't bad. I do recommend getting pipe fastners to secure the boards to the pipes so they don't shift around
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Reviewed in the United States on June 2, 2021