Upgrade your Hayter lawn‑mower tractor with this premium flat transmission idler pulley. Engineered as a direct‑fit replacement, it restores smooth power flow to the drivetrain and eliminates the wear that can cause jerky cutting. Made from high‑strength material, the pulley delivers reliable performance season after season while keeping installation simple—just drop it into the original bore and secure it with the factory bolt.
Key specifications
– Diameter: 86 mm
– Bore: 17 mm
– Height: 26 mm
Fits the following Hayter models
– 14/38, 15/38, 16/42, 18/42 (ST42)
– Heritage tractors: 13/30 (131A‑E, 131S), 13/40 (144R‑S), H15/40 (145R‑S), H19/40 (146R‑S)
Compatible part numbers – 20811500, 421409MA, 91179, MU690409MA, 80255‑Y09‑003, CG25601554H0 and many others.
This aftermarket idler pulley meets or exceeds original specifications without the premium price tag. It’s a cost‑effective solution for anyone needing a quick fix or a preventive replacement on their Hayter tractor. Keep your mower running at peak efficiency—order now and enjoy hassle‑free mowing all year long.





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