Strongthium Speed Feed 400 Head (for Echo SRM-225 and others)
A Speed Feed 400-style bump-feed head that reloads without opening, replacing Echo 99944200907 — with bolts and nuts for other machines.
In short:This Strongthium head is a Speed Feed 400-style twin-line bump-feed head, listed as a replacement for Echo parts 99944200907 and 78890-30000 on machines such as the Echo SRM-225. You reload it without opening the housing: push line through the eyelets and twist the knob to wind it in. A mounting kit includes three stud bolts (7 mm and 8 mm left-hand, 8 mm right-hand) and four nuts (including 10 × 1.0 F, 8 × 1.25 F and 3/8-24 RH). Check your arbor before buying.
You'll be sent to Amazon in your country. Indicative price — live, localised pricing where available. As an Amazon Associate we earn from qualifying purchases.
Pros
- Reloads without opening the head
- Large mounting kit for many machines
- Direct replacement for the Echo head on SRM-225 and similar
Cons
- Pattern part, not the original Speed Feed
- Kit is aimed mainly at Echo and US-style fittings
- Amazon.co.uk listing unavailable in October 2026
What it is
A Speed Feed 400-style head from Strongthium: a twin-line bump-feed head you reload without opening it — push the line through the eyelets, turn the knob and it winds itself in. It’s listed as a replacement for Echo parts 99944200907 and 78890-30000, for straight-shaft machines such as the Echo SRM-225, SRM-210 and SRM-2620, and is made of a wear-resistant composite. When we checked in October 2026 the listing showed as unavailable.
Will it fit?
The listing includes a large mounting kit: three stud bolts (7 mm and 8 mm left-hand, 8 mm right-hand) and four arbor nuts (including 10 × 1.0 female, 8 × 1.25 female and 3/8-24 right-hand), plus spacers. That covers Echo and many US-style fittings, but not every machine — check your gearbox thread against the list. Many European petrol trimmers use M10 × 1.25 left-hand, which isn’t explicitly listed.
Using it
Tap the head on the ground at full throttle to release line. To reload, line up the arrows, feed line through until the ends are equal and twist the knob. Thick line needs a powerful engine; check the line size in your manual and our line size guide.
Alternatives
For machines with M10 × 1.25 left-hand arbors, the Oregon Lightning Load Pro includes an M10 × 1.25 LH adaptor. Compare in the best brush cutter heads.
More heads we cover
A cheap pattern bump-feed head replacing the Echo Speed-Feed 400 on the SRM-210, SRM-225 and SRM-230 — tap-to-feed, no special tools.
- TypeBump feed (tap to release line)
- ReplacesEcho Speed-Feed 400
- Listed forEcho SRM-210, SRM-225, SRM-230
Husqvarna's T25 tap-and-go trimmer head with a 10 mm left-hand thread — the standard head on many Husqvarna straight-shaft trimmers.
- TypeTap-and-go (bump feed), twin line
- Arbor10 mm, left-hand thread
- ShaftStraight-shaft machines
Husqvarna's T35 semi-automatic (tap) trimmer head for 2.4–2.7 mm line — a tougher head for mid-size petrol brush cutters on rough grass.
- TypeSemi-automatic (tap) head
- Line size2.4–2.7 mm
- Part number578 44 63-01
A twin-line tap-feed trimmer head with an M10 × 1.25 left-hand thread, pre-loaded with 4 m of 2.4 mm line and cutting up to 30 cm — for petrol brush cutters.
- TypeTwin-line tap (bump) feed head
- ThreadM10 × 1.25 left-hand
- Line supplied4 m of 2.4 mm, pre-loaded