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#572923 - 10/31/19 12:58 PM DIY Oil Extractor  
Joined: Aug 2004
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On Holiday Offline
Daddy
On Holiday  Offline
Daddy
Admiral

Joined: Aug 2004
Posts: 6,581
PA and Smith Mountain Lake
I follow this lawn care YoutTube channel and here is a quick and easy DIY oil extractor that could be used for your boat. Granted the mason jar would need to be bigger.


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#572926 - 11/01/19 01:08 AM Re: DIY Oil Extractor [Re: On Holiday]  
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Jack T Offline
Admiral
Jack T  Offline
Admiral

Joined: Jan 2003
Posts: 4,037
Southern California
Interesting. Seems it would take 20 - 40 minutes to drain 5 quarts from an engine crankcase.
I wonder how he cleans up the bottle, tubing and cut off water bottle without making a mess.
I my case, I change the oil where there is not electrical power--the dock. Therefore, I find the pump vacuum oil extractor works well. 5 quarts "drain" in about 10 minutes. The oil is carried away while in the extractor, so there is no transfer required. Just take it to the recycling station and pour the oil out of the extractor, plug the dumping hole with a rubber stopper and away I go. Clean it up is not necessary except for one tube. Repeat the process all over again at the end of the next summer.


Have a great day of boating
2012 Monterey 224 FS,
300 HP Volvo Penta with catalytic converters

#572927 - 11/01/19 08:34 AM Re: DIY Oil Extractor [Re: On Holiday]  
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tpenfield Offline
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tpenfield  Offline
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Cape Cod, MA
I have tried that technique for a few years on my boat(s) . . . it took a looong time . . . 40 minutes might be generous. I used a shop vac and a 5 gallon homer bucket w/ sealed top. My homer bucket looked like a crinkled mess after each oil extraction.

It takes quite a bit of vacuum to pull the oil up out of a full-sized engine (V8 / V6) vs. a lawn mover. . . . assuming that you are using the dipstick tube to extract the oil. In my experience, shop vacs can only get about 3 psi of vacuum, and that does not seem to be quite enough to pull the oil up the dipstick & through the tube at any reasonable rate of speed. Maybe a vacuum pump would be better idn

In the end, I found that the hand pump does the trick in about 10 minutes.

I think if you can get a solid/rigid container for the oil/vacuum . . . something like a small beer keg - empty it first smile - that might be better. A rigid container + a vacuum pump would be ideal. I would NOT use a glass container though . . . ( boom !!! )

I do like the idea for lawn mowers, snow blowers, and other small engines smile

Last edited by tpenfield; 11/01/19 08:35 AM.

Regards, Ted

Formula 330SS

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#572929 - 11/01/19 12:24 PM Re: DIY Oil Extractor [Re: On Holiday]  
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Jack T Offline
Admiral
Jack T  Offline
Admiral

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Southern California
"t takes quite a bit of vacuum to pull the oil up out of a full-sized engine (V8 / V6) vs. a lawn mover. . . . assuming that you are using the dipstick tube to extract the oil."

With the small engine oil extractor method with the shop vac, the difference in elevation is very small. I would guess that the oil flow rate is not much more than a siphon. Because the oil pan in a larger engine is so much lower, it takes a lot more suction to lift the heavy oil higher. In fact, in most cases, a siphon will not work because the container catching the oil is higher than the bottom of the oil pan.

Last edited by Jack T; 11/01/19 12:28 PM. Reason: Corrected and added some clarification text

Have a great day of boating
2012 Monterey 224 FS,
300 HP Volvo Penta with catalytic converters


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