New V-belt suitable for Yanmar 2YM15, 3YM20 and 3YM30 marine diesel engines. This belt drives the alternator (and water pump) and is a direct 1-to-1 replacement for the original. The current Yanmar part number 129612-42290 replaces the older number 119831-42290.
✔️ Exact OEM fit — direct replacement for 129612-42290 / 119831-42290
✔️ A-profile V-belt (A37.5), oil and heat resistant for heavy-duty use
✔️ Suitable for Yanmar 2YM15, 3YM20 and 3YM30 (check serial number, see note)
Yanmar
Yanmar
Komatsu
Note: later versions of the 3YM30 (from approx. serial number E20847) use a flat multi-rib belt (Yanmar 128990-77580) instead of this V-belt. Therefore, always check your engine serial number or the old belt before ordering.