Oil drains slowly

[CHassmann]

Great info guys. Thanks!

[Evening Shade]

I have 2 different extractors. A manual vacuum pump called Topsider and I also have one that runs off the battery in the boat. It has a Jabsco pump similar to the ballast pumps in our boats. Both work well. I just insert the extractor tube down into to drain hose on the engine and pump the hot oil out. It works great.

DO NOT insert the extractor tube down in the dipstick tube! It can get stuck and be EXTREMELY difficult to get out! Don't ask me how I know this.

Another tip: Make sure the oil drain hose coming off of the oil pan is not kinked! I couldn't get my oil extractor to work the first oil change on my new boat until I stuck my hand under the oil pan and traced the drain hose only to find that it was turned back on itself from the factory causing it to kink and not allow the oil to drain.

[shanesj]

DO NOT insert the extractor tube down in the dipstick tube! It can get stuck and be EXTREMELY difficult to get out! Don't ask me how I know this.

I can second that!

I use a Mightyvac and changed out the hose so I could add a connection that screws onto the drain hose connection. I found that doing so seemed to work better as it held a vacuum better.

[GMLIII]

I can second that!

I use a Mightyvac and changed out the hose so I could add a connection that screws onto the drain hose connection. I found that doing so seemed to work better as it held a vacuum better.

Yep I have that same brass fitting; works great. I also installed another Male brass fitting on the end of the flexiable tubing which is attached to the ridged plastic tube. I use that tube attachment to suck out my transmission fuild, and my 40 HP Yamaha outboard engine oil

[nohlan_4]

I have tried several brands and talked to a number of friends who do their own oil changes. In my opinion the MITYVAC 7201 Fluid Evacuator is one of the best you can find. You can purchase brass fittings at Home Depot that connect directly to the drain tube of your engine.

Warm the engine, attach the extractor, give it 10+ pumps and it completely drains the oil in 3 min. Its large enough to store all of the oil without having to stop and empty. This is the biggest problem with most of the smaller, cheaper extractors.

I got mine for a great price from Tooltopia.

https://www.tooltopia.com/mityvac-7201.aspx


Sent from my SM-G965U using Tapatalk

What fittings do you use for the setup? I find on my boat I can get the first 2.5litres out real quick and then it loses suction almost like the oil drain isnt low enough on the pan it starts pulling air. Was thinking about parking the trailer on wood to get a tilt so I can drain it fully. Benn like this since I've owned the boat so I just take out 2.5 litres and call it good now.

[GMLIII]

I don’t know the size of the fitting but the picture of the female fitting Shane posted above is what you want . It screws directly onto the end of the oil pan drain fitting. Also as stated above it helps create a vacuum effect which help the draining tremendously

[greggmck]

What fittings do you use for the setup? I find on my boat I can get the first 2.5litres out real quick and then it loses suction almost like the oil drain isnt low enough on the pan it starts pulling air. Was thinking about parking the trailer on wood to get a tilt so I can drain it fully. Benn like this since I've owned the boat so I just take out 2.5 litres and call it good now.

I use the same brass fittings shown above. But realize you actually need two separate fittings. One is a barbed threaded male brass fitting that you install into the extractor tube. Make sure the barb is the right size for your extractor hose and the threads are the same as the oil drain hose fitting. Then you need the barrel connector to connect the two male-to-male connections you have created (male on extractor tube, male on drain hose). I don't know the size of the threads off the top of my head. But you can measure the fitting on the boat. Mine is about 1/2" external diameter. See the picture below. If you are unsure, buy a few of them around that size and check them for thread fit on the boat before you install the fitting into your extractor hose. Then return the ones that don't work. They are only a few $. The drain hose is at the low point on the oil pan so suction there should remove ALL of the oil (if the engine is level). I pump the extractor another 10 times after most of the oil is out to pull out any sludge in the bottom of the pan. Then disconnect the extractor hose connection, replace the plug, and move on to changing the oil filter.

[Nautiquehunter]

I always start the drain process the night before by the morning its drained . No pumps needed.

[nohlan_4]

I use the same brass fittings shown above. But realize you actually need two separate fittings. One is a barbed threaded male brass fitting that you install into the extractor tube. Make sure the barb is the right size for your extractor hose and the threads are the same as the oil drain hose fitting. Then you need the barrel connector to connect the two male-to-male connections you have created (male on extractor tube, male on drain hose). I don't know the size of the threads off the top of my head. But you can measure the fitting on the boat. Mine is about 1/2" external diameter. See the picture below. If you are unsure, buy a few of them around that size and check them for thread fit on the boat before you install the fitting into your extractor hose. Then return the ones that don't work. They are only a few $. The drain hose is at the low point on the oil pan so suction there should remove ALL of the oil (if the engine is level). I pump the extractor another 10 times after most of the oil is out to pull out any sludge in the bottom of the pan. Then disconnect the extractor hose connection, replace the plug, and move on to changing the oil filter.

See that is odd because this year I took a real good look at where the take off for the drain is on my 2013 and there is a good amount of pan below the take off of the drain. Which I thought was odd. It’s not right at the lip of edge of the pan like I thought it would be. What amount do you usually pull out? And is it correct level on the dipstick?

[Evening Shade]

See that is odd because this year I took a real good look at where the take off for the drain is on my 2013 and there is a good amount of pan below the take off of the drain. Which I thought was odd. It’s not right at the lip of edge of the pan like I thought it would be. What amount do you usually pull out? And is it correct level on the dipstick?

When I'm finished draining my oil I always check the dipstick to make sure I got all of the oil out. There is no oil on the dipstick when I check so I assume I'm getting all or almost of the old oil out.

[nohlan_4]

When I'm finished draining my oil I always check the dipstick to make sure I got all of the oil out. There is no oil on the dipstick when I check so I assume I'm getting all or almost of the old oil out.

That is only indicating if you got the first litre/quart of oil out though. The dipstick doesn't go to the bottom of the pan.....

Should be measuring what your actually getting out by pouring into a measurable container. Like for myself the most I've ever been able to get out easily is 2.5litres.

[greggmck]

That is only indicating if you got the first litre/quart of oil out though. The dipstick doesn't go to the bottom of the pan.....

Should be measuring what your actually getting out by pouring into a measurable container. Like for myself the most I've ever been able to get out easily is 2.5litres.

I would think something is very wrong. I have been doing this on 4 G23s now, all H6 engines. I measured the amount of oil I pulled from the engine on the first oil change (factory break-in oil) for my 2019 G23 H6DI. I pulled out 6.2 Liters or 6.5 Qts. plus what is in the oil filter. So you are connecting your extractor to the oil drain hose and only pulling 2.5L? Is the boat level? Is the oil warm? You are only changing 1/3 of the oil. That can't be good for the longevity of the engine?

[greggmck]

I always start the drain process the night before by the morning its drained . No pumps needed.

On the H6DI in the G23, the oil drain hose will never reach the drain hole in the boat. Also, I keep my boat on a lift, in the water, so even if the hose reached the drain hole, I could not get under the boat with a pan. Finally, I would never leave the drain plug out overnight (in case the lift ever failed), so extraction is my only option.

[nohlan_4]

I would think something is very wrong. I have been doing this on 4 G23s now, all H6 engines. I measured the amount of oil I pulled from the engine on the first oil change (factory break-in oil) for my 2019 G23 H6DI. I pulled out 6.2 Liters or 6.5 Qts. plus what is in the oil filter. So you are connecting your extractor to the oil drain hose and only pulling 2.5L? Is the boat level? Is the oil warm? You are only changing 1/3 of the oil. That can't be good for the longevity of the engine?

That's all I have ever been able to get out of it. Warm oil and all. I don't think its a suction issue as that first 2.5 litres comes out within 2 minutes or less then its sounds like the extractor is sucking air. But this is a different engine than the H6. Maybe the factory drain is in a different spot.

And my engine only holds 5.7 litres so I'm getting about 50% out.

[mpost]

Take a look at this video. He discusses oil pan drain plugs and residual oil about 2 min.s into the video. Makes sense if the drain plug is on the side of the pan. If you are only getting 2.5 L out of a 5.7 capacity, I would definitely try the suction method.