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This narrow V-belt drives the alternator and freshwater pump on classic Yanmar marine engines. Important: this belt comes in two lengths — 730 mm (Z29) and 790 mm (Z31). Therefore, always measure your old belt before ordering to ensure you choose the correct version; both variants have the same 10 x 6 mm profile.
✔️ Direct replacement for original Yanmar part numbers 128170-77350 and 105582-77790
✔️ Profile 10 x 6 mm, available in 730 mm (Z29) and 790 mm (Z31)
✔️ Suitable for Yanmar 1GM10, 2QM15, 3GM and 3HMF marine engines
Pay attention to the length type: Li is the inner circumference, Lw/Ld the pitch length and La the outer circumference. In doubt? Measure your old belt or order by OEM number.
Yanmar marine engines