Oil condition checking system for marine propulsion unit
 A lubricant condition sensing unit for the lower unit of a marine propulsion drive. Light is transmitted through the lubricant and the condition and level of the lubricant is sensed by comparing the light signal transmitted with a predetermined value. 
Sanshin Kogyo Kabushiki Kaisha
F B F F G
F01M B63H F02B F16N G01F
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Hironori
Yamada