The Jabsco marine engine oil drain pump makes changing the oil easy and a lot less messy, especially for engines with threaded dipstick tubes. To drain your boats engine oil, thread this polished brass hand pump to the dipstick tube and pump to change the oil.
Jabsco Oil Drain Pump fits many popular marine engines with threaded male 3/4" garden hose threads at the top of the dipstick tubes, such as OMC and Mercruiser. Simple one-hand pumping draws oil out from the engine. 2' of 1/2" ID drain hose and a connection for 3/4" GHT male thread are included.
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Oil Temperature should not exceed 140F when using this pump.
Oil Change Pumps
How many pumps to extract 1 gallon of oil?
It's been since the end of last season since I did an oil change but I'd say about 20 strokes will remove a gallon.
It's not a very precise process, but it is pretty easy and fast. We emptied our v-6 OMC in less than 5 minutes. The threaded connection is key. The answer to your question may vary depending on the specifics of your engine. The best way would be to try it yourself and measure into an empty milk jug or equivalent. This beats the heck out of paying through the nose for the same service at your local marina, if you're willing to try DIY.
Works as advertised.
The hose that comes with the product is too short to reach the floor of the boat. No problem using 1/2 inch heater hose from the auto store to make it work.