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Lower Unit Gear Oil Pump for Standard Quart Bottles, Premium Transmission Fluid Pump, 3/8 Inch Swivel Adapters, 8mm 10mm Adapters, Fit Most Marine Boat Outboard Motors (NOT for Volvo Penta)

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$5.19

$ 1 .99 $1.99

In Stock
  • 【Universally Relevant】 It can be used with standard quart bottles that have a 28mm bottle cap and smoothly dispenses 8 cc of fluid per pump stroke. Maintenance on cars, trucks, RVs, ships, motorcycles, and other daily uses is appropriate for differential fluid pumps.
  • 【Premium Materials】 The pump is made of premium plastic, the hose is made of premium rubber, and the adapter is made of premium aluminum, reliable and durable. Compared with conventional plastic adapters, our aluminum adapters are more durable. You can use it with confidence.
  • 【Extended Reach】 Equipped with an extra-long clear plastic hose, this manual tool guarantees easy access to hard-to-reach areas, enhancing the ease of transmission fluid transfers in both automotive and marine setups.
  • 【3 Adapters Sizes】 3/8" swivel adapter connected to clear plastic tubing. 8mm and 10mm metal adapter fits for most foriegn outboard motor's lower unit drain threads hole.
  • 【What You Get】 You will receive this lower unit oil pump kit, including 1 piece of pump, 2 pieces of hoses, one long and one short, 2 pieces of adapters, one 8mm/0.31in and one 10mm/0.39in. Buy according to your needs, with different adapters, this lower unit gear oil pump changes and refills the marine motor lower unit gear lube in a few minutes. Easily and quickly work.



Product Description

transmission fluid pump
transmission fluid transfer pump
transmission fluid pump kit
differential fluid pump

marcos g
September 5, 2025
Worked excellent for refilling the differential fluid without making a messs and fairly priced too.
Cheryl L.
September 2, 2025
Absolute Crap! Broke within 2 seconds of use….
Jerrod
August 19, 2025
The included flexible tube is way too loose and can't be properly attached to the pump. Even with the clamp. It's just too loose.I used a piece of 1/4 inch fuel line onto the pump which fit very snuggly and then inserted the included barb adapter into the other end of the fuel line. I then inserted the thread end of barb adapter into the included flexible tubing with the clamp. It leaked a little bit but got 5 quarts of 30 w oil into the rear end of my 1980 Sears tractor.
BTM-4
August 16, 2025
Honestly, when I ordered this pump, I expected it to be bigger then what I received. The pump does work as intended and can be used with other fluids like ATF and motor oil. Easy to use and the adapters work in any application that accommodates 8mm or 10mm. Make life easier with less mess and loss of material.
DAVID JOHNSON
June 27, 2025
Larger diameter hose is better than my old one . Pumps well . Put my own clamps on. Cheesy ones given
Kenneth Johnson
June 26, 2025
Total piece of crap! The primary issue is that it uses a lotion bottle top rather than a hose fitting. This means the supplied clamp doesn’t hold. I ended up having smelly 90 weight gear oil squirting all over my clothes, shoes, and workspace. It took 3 zip ties before the hose held. The seals leaked. Moreover, there is no valve to allow the hose to empty itself easily. All-in-all, it made a relatively simple task turn into an overly complex and messy chore.
Cindi B.
June 20, 2025
Pump works as expected but clear hose will not stay on pump discharge spout. It’s slightly to large.
raverson
May 30, 2025
To change the oil in the generator on our B van, this is a necessary piece of equipment. The oil fill sits in an awkward place and there isn't access for a funnel or quart oil bottle. This pump attaches to the oil and makes filling possible without mess or contamination of the unused oil.
marcos g
May 27, 2025
Worked excellent for refilling the differential fluid without making a messs and fairly priced too.
Cheryl L.
May 14, 2025
Absolute Crap! Broke within 2 seconds of use….
Jerrod
April 27, 2025
The included flexible tube is way too loose and can't be properly attached to the pump. Even with the clamp. It's just too loose.I used a piece of 1/4 inch fuel line onto the pump which fit very snuggly and then inserted the included barb adapter into the other end of the fuel line. I then inserted the thread end of barb adapter into the included flexible tubing with the clamp. It leaked a little bit but got 5 quarts of 30 w oil into the rear end of my 1980 Sears tractor.
BTM-4
March 15, 2025
Honestly, when I ordered this pump, I expected it to be bigger then what I received. The pump does work as intended and can be used with other fluids like ATF and motor oil. Easy to use and the adapters work in any application that accommodates 8mm or 10mm. Make life easier with less mess and loss of material.
DAVID JOHNSON
March 5, 2025
Larger diameter hose is better than my old one . Pumps well . Put my own clamps on. Cheesy ones given
Kenneth Johnson
December 16, 2024
Total piece of crap! The primary issue is that it uses a lotion bottle top rather than a hose fitting. This means the supplied clamp doesn’t hold. I ended up having smelly 90 weight gear oil squirting all over my clothes, shoes, and workspace. It took 3 zip ties before the hose held. The seals leaked. Moreover, there is no valve to allow the hose to empty itself easily. All-in-all, it made a relatively simple task turn into an overly complex and messy chore.
Cindi B.
December 16, 2024
Pump works as expected but clear hose will not stay on pump discharge spout. It’s slightly to large.
raverson
December 9, 2024
To change the oil in the generator on our B van, this is a necessary piece of equipment. The oil fill sits in an awkward place and there isn't access for a funnel or quart oil bottle. This pump attaches to the oil and makes filling possible without mess or contamination of the unused oil.
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