Quicksilver Gear Lube Pump Adapter.
This adapter converts from 3/8" thread on the lube pump to 8mm on the gear housing for Japanese based outboards.
It is always strongly recommended that the gear oil be checked and replaced after every 50 hours of saltwater use and before storage at the end of each season to prevent damage to the gearbox through water ingress through the propeller seal, should it have failed during the season.
Quicksilver Part No: 91-883704Q03
Fits Mercury/Mariner 4/5 HP (1987 and newer)
4/5/6 HP 4-stroke
225 EFI 4-stroke (MY2005 & newer)
8/9.9 HP 4-stroke (MY2006 & newer)
25/30 EFI 4-stroke
All Mercury/Mariner outboards of Japanese origin and all Nissan/ Yamaha/Tohatsu/Honda outboards with an 8 x 1.25 metric threaded gear lube fill hole.