Wärtsilä 6L20 Crankshaft High-strength forged crankshaft for Wärtsilä 6L20 marine and stationary engines. Engineered for heavy-duty performance under continuous operation, and available in new or reconditioned condition. Journals inspected, ground, and to standard. Nondestructive testing (MPI) for crack detection Each crankshaft is supplied with full dimensional inspection reports and test certifications. Undersize bearings available upon request. Contact us for inspection reports, availability, or a quotation.