FEIN MultiMaster Top FMM 350 QSL: problems, parts and running costs

Checked: 2026-10-15

Summary

Owners’ main complaints are average cutting speed, high noise and the fact that this generation is superseded — FEIN’s US catalogue now lists the MM 300, MM 500 and MM 700, so FMM 350 QSL stock sits with dealers. There are no battery or subscription costs on a corded tool; the recurring spend is consumables such as E-Cut blades, segment and carbide blades, sanding sheets and rasps, and no annual total was published. Under roughly $200 with a rich Top-tier kit it is good value; above $270 the current MM 500 Plus or MM 700 is the better buy.

Common problems and fixes

Loud — the same test measured 98 dB(A) cutting in a field setup, louder than a Milwaukee cordless at 92 dB(A) and quieter than a Rockwell at 104 dB(A); hearing protection is realistic for sustained indoor work. [1]

Parts and consumables

Carbon brushes (30711157000) — sold for the FMM 350 Q / FMM 350 QSL in both 110 V and 240 V versions. FEIN excludes carbon brushes and armatures from warranty as wear items, so budget for them as a consumable. [10][5]
Power cord — replace a damaged cord only with a genuine cable from a FEIN service centre, per the manual. [4]

Yearly running cost

Not enough data for a total. The recurring cost is consumables — E-Cut saw blades, segment and carbide blades, triangular sanding sheets and rasps — but no source lists accessory prices, so no yearly total can be computed. [1][3] StarlockPlus accepts FEIN, Bosch and third-party accessories, which keeps consumable pricing competitive, and a corded tool has no battery to replace and no subscription to pay. [3] There is no electricity figure either: the tool draws 350 W from a 120 V outlet, and no recharge frequency or duty-cycle data was published to convert that into an annual cost.

When it is a good buy

Hardwick & Sons lists the MultiMaster QuickStart FMM 350 QSL at $269.00 [6]; Strobel’s Supply lists the MultiMaster Start Q FMM350QSL at $297.46 [7].
For comparison, the current-generation MM 500 Plus MultiMaster Start lists at $199.95 at Home Depot [8], and Pro Tool Reviews puts the corded MM 700 series from $280 [2]. The 2018 review quoted $350 for the Top accessory kit and $199 for a more basic set at that time [1].
Under roughly $200 with a rich accessory kit — ideally a Top or Top Plus tier with the hard case, dust extraction assembly, round sanding disc and carbide rasp — it is good value and arguably better than the entry MM 500 Plus [1][8].
Between $200 and $270 you are paying corded-incumbent money for a superseded design; the 2026 field includes the Bosch GOP18V-34N bare tool at $179, the Milwaukee M18 Fuel 2836 at $249 and the Makita XMT04 at $269 [2].
Above $270–$300 value is weak: the MM 500 Plus at $199.95 or the MM 700 series from $280 are the more defensible purchases [2][8].