This Yanmar alternator V-belt is used to drive the alternator on Yanmar 3YM series marine diesel engines. A worn or slipping belt can cause poor battery charging, squealing noise or overheating if the belt also affects auxiliary drive components. Suitable as a direct replacement during regular service or preventive maintenance. Compatible engines Yanmar 3YM20, 3YM30 Part number 119831-42290E
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