Makita part YA00000890 — Blade support (original Makita), a direct replacement for the blade hub on select Makita electric lawn mowers. It’s supplied as a single blade support (quantity: 1) and is the same part shown in Makita parts diagrams for the ELM4121 series.
Fits/compatible with Makita ELM3720 and ELM4121.
Key details you’ll want to know before fitting:
- Function: supports and locates the cutting blade on the mower spindle (replaces the original blade support).
- Bore / fitment dimensions: listed bore/inner dimensions 16 × 12.5 mm and intended blade mounting width ≈ 50 mm (matches the blade and spacer arrangement used on the listed models).
- Mounting hardware: installs with the M8-size blade / bolt arrangement used on the ELM4121 deck.
If your mower is one of the models above and the blade hub or support is worn, this original Makita YA00000890 restores correct blade location and secure mounting so the mower spins true again.
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