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Yamaha Motor Revs Your Heart

OEM Casting and Forging

Bottom Cowling

Made of corrosion-resistant aluminum alloy, this part improves outboard durability and reliability.

Bottom Cowling

Bottom Cowling

A corrosion-resistant aluminum alloy (YDC30, Al–Si alloy series) is used to produce this bottom cowling, which is located at the bottom-most part of an outboard motor's engine case. Adding a special coating further improves its corrosion resistance. The largest bottom cowlings are produced with a 3,500-ton die-casting machine. Correcting the mold as needed keeps the parts produced uniform, reducing deformation and warping, and ensuring a high degree of accuracy.

Product category Outboard Motors
Casting method High-pressure die-casting
Material Aluminum alloy (ADC3)
Used for Lower unit
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