Outboard Engine Lock is made up of polished 304-grade stainless steel; Lock core material 316 stainless steel, the integrated lock is used to tighten up the two halves of the lock to clamp the engine fixings.
In order to prevent the key from accidentally falling into the sea, the red dot on the keyhole of the lock cylinder must be in line with the black dots on both sides before the key can be pulled out. The notch on the key is aligned with the red dot, the key is better inserted into the keyhole.
The two halves of the lock have sponge linings to reduce rattling vibrations when the engine is running.