Felco 2 Secateurs: Why the Return Spring Pops Out and How the C7 Retainer Locks It

The return spring on a Felco 2 is a single loop of hardened wire, roughly 1.5 mm in diameter, and its job is simple: after each cut, it pushes the two handles apart. Each wire end sits in a shallow blind hole on the inside face of a handle. Those holes are plain pockets. They are not undercut, and they do not clamp the wire.

During ordinary cutting, the closed-handle geometry keeps compression on the spring and holds the ends down in their holes. Open the tool fully while the nut is loose, and that restraint disappears. The loaded loop can sit against nothing solid.

That is when the spring leaves. The wire stores energy across its working travel. Once a handle rotates far enough for the wire ends to lose contact with the blind holes, the loop turns stored energy into linear velocity and exits the assembly. On the original Felco 2, this is a design consequence, not a defect, and it explains the familiar report of a 6/91 spring vanishing during a routine blade swap.

How the C7 changes the spring seat

Felco later added the C7 retainer, a small stamped steel clip that captures one end of the return spring and locks it against the handle. With that clip fitted, the blind hole is no longer the only locator for the wire.

On tools using the retainer, the spring end passes through a formed tab. The tab holds the wire even when the handles are opened beyond their normal working range.

During reassembly, the spring stays put. The handle can be opened to any angle needed for seating the blade and threading the central bolt, with no second pair of hands needed to pin the loop in place.

The C7 belongs to the later Felco 2 spring assembly sold under reference 2/91. That assembly bundles the return spring and retainer together. Retrofitting it to an older Felco 2 depends on the handle geometry, so a body made before the change cannot always accept the clip unless the handle casting is changed as well.

A replacement marked 6/91 is the bare wire loop for the original seating arrangement. A 2/91 kit includes the retainer geometry. The wrong purchase may still put a spring end into the hole, while leaving it with nothing to lock against.

Reseating the original spring

Leave the pivot bolt in the tool, backed off enough for movement. On the Felco 2, the central bolt is an 8 mm hex with a locknut behind it. Loosen the locknut first, then loosen the bolt until the two handles separate at the pivot while the blade and counterblade remain loosely stacked.

Seat one end of the spring in its blind hole while the handles are close to the closed position. Hold that end down with a fingertip or the tip of a small flat screwdriver pressed into the hole. Rotate the free handle toward the seated end, compressing the loop, and guide the second wire end into the opposite hole before the loop reaches full compression.

That capture window is only a few degrees of handle travel. Both ends can be in their holes while the loop is still manageable, then a small extra opening angle turns the same loop into a launch spring. The awkwardness is built into the geometry of the early seating arrangement.

Once both ends sit properly, bring the handles closed. In that position, the tool traps the wire. Thread the pivot bolt and tighten it until the blade swings under its own weight yet does not flop. Run the locknut down against it.

Cycle the handles a dozen times before putting the secateurs back to work. A spring that jumps out during the first few cuts was never fully seated.

Oil in the blind holes

A single drop of light machine oil on the spring ends and inside the blind holes reduces the friction that fights the seating step. Felco sells a service oil, and any non-gumming light oil serves the same role here.

Sharpening while the blade is off

A spring job usually leaves the blade out in the open, with the bevel easy to reach. The Felco 2 cutting blade has a single bevel ground at roughly 23 degrees, while the flat back face is left untouched. That asymmetry is central to a bypass secateur: the flat face rides against the counterblade, and the bevel does the cutting.

A waterstone in the 800 to 1000 grit range restores a working edge without spending steel on a mirror finish. Lay the bevel flat on the stone so the existing 23 degree angle registers against the abrasive. Draw the blade edge-trailing across the stone in short passes. On a moderately dull blade, ten to fifteen strokes is usually enough.

The Felco 990 sharpening tool is a carbide-and-ceramic pocket device, and some owners like it for field touch-ups. It removes more metal per pass than a stone, so overuse shortens blade life.

Once the bevel is sharp, a wire burr forms along the flat back. Remove it with one or two light passes, keeping the flat face completely flat on the stone. Never grind a bevel onto the back face. That lifts the cutting edge off the counterblade, and the tool begins to fold stems and lose its clean slicing action.

A sheet of newspaper held in the air gives a quick edge check. A properly sharpened Felco 2 slices it cleanly. A torn edge points back to more honing or a burr that has not been removed.

The same honing habits carry over to a billhook kept for heavier work. A billhook bevel is shallower, often 20 to 25 degrees on each side of a double bevel, and it usually needs a coarser stone first because the steel is thicker and the edge damage is deeper. Use the same edge-trailing motion and burr-removal step, working along the longer blade in overlapping sections.

When pivot drag mimics a weak spring

A Felco 2 that struggles to reopen may have a healthy spring and an overtightened pivot. The central bolt sets drag between the blade and counterblade. If it is too tight, the return spring cannot overcome the friction, so the handles creep open slowly or stall half-shut. Many owners replace the spring first, see no improvement, and then find the bolt tension was causing the trouble.

To find the culprit, remove the spring entirely and open and close the tool by hand. If the blade swings freely and closes with light resistance, the pivot tension is right and the spring becomes the suspect. If the blade drags or sticks with no spring installed, back the pivot bolt off a quarter turn at a time until the motion frees up, then reset the locknut. A spring test has value only after the pivot moves cleanly.

Corrosion in the blind holes can cause the same kind of misbehaviour. Sap and moisture collect in those shallow pockets over a season of privet and rose work. Once dried, the residue reduces the usable depth of the holes, leaving the wire ends proud enough to slip out under load.

A cotton bud with a trace of solvent clears the holes. The same residue gums the pivot, which is why a Felco 2 used hard through summer benefits from a full teardown before winter storage.

Reading the handle before teardown

The C7 clip changes a two-handed reassembly into a one-handed one. It also identifies the generation of tool in your hand. Run a thumb along the inside of the handle where the spring seats. If a stamped tab captures the wire, the retainer is already there. If the spring end sits bare in an open hole, the launch risk remains.

Felco’s parts documentation does not settle the retrofit question for every older body. The 2/91 assembly includes the retainer, yet a Felco 2 from the 1980s may still depend on whether the handle casting was revised along with the clip. Does the casting give the C7 tab a proper seat, or is the blind hole still the only place for the wire to bear?