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

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 |
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Casting method | High-pressure die-casting |
Material | Aluminum alloy (ADC3) |
Used for | Lower unit |