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Standard size main bearing (crankshaft bearing) for the Yanmar 2YM15, 3YM20, and 3YM30 marine engines. New main bearings ensure proper bearing clearance and stable oil pressure around the crankshaft — essential for any engine overhaul.
✔️ Standard size (STD) for an original crankshaft
✔️ High-grade bearing material for a long service life
✔️ Exact OEM fit in the original engine block
Technical specifications:
Tip: during an overhaul, also replace the connecting rod bearings and thrust washers for a complete bearing renewal.
Yanmar: 2YM15, 3YM20, 3YM30
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