Engine oil “suckers”

alk

alk

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Does anyone have better luck than me, pulling oil out the dipstick tube? For years I used an electric one - but it took forever, pulled the ( hot) oil a few drops at a time, it seemed. I used to keep my boat in my yard, so wasn’t a huge problem- i would do something else while it pumped away for an hour or so. But last couple years I’ve left my boat at the marina all winter - so in an attempt to get it done a little faster I spent $100 on a moeller hand pump version. Not that much better. Warmed the motor up to 170 or so, and started pumping. 30 minutes in, I had enough oil to fill a coffee cup. What am I doing wrong, there has to be an easier way?

i wish I put a drain hose in the bottom of the pan when I dropped this motor in a few years back. But no such provisions.
 
I had an old pump that worked great. It was a sea something. Then it crapped out a year ago. My new one isn’t as good. But it still only takes about 20 min per engine. Maybe try opening the oil fill cap?
 
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I had better luck with the vacuum canister type extractors. Run the engines to warm up the oil, took only a few minutes for each one.
 
I did have the cap off, and oil was nice and warm. something must be going on with the route of the dipstick in this big block motor. my ski boat had a small block, and the oil didn’t fight so hard to get out.

this is the one i bought yesterday. Not sure if it’s defective, or if Is a designed this way - but after I pump ten or so times, and build up a nice vacum, the release valve starts to let air in, even though it’s tightened the entire way.

 
I would look at the hose. If it's old and too pliable, it will collapse in on itself and prevent the flow of oil. Another thing is I would lift the hose out about 1/4 inch at first to make sure it's not stuck on the bottom of the dipstick tube.
 
The hose on my powered tool was pretty worn - but on the one I bought yesterday it's a brand new hose, with a wire core. I did try moving it up and down to get better flow, but no luck.
 
alk said:
I did have the cap off, and oil was nice and warm. something must be going on with the route of the dipstick in this big block motor. my ski boat had a small block, and the oil didn’t fight so hard to get out.

this is the one i bought yesterday. Not sure if it’s defective, or if Is a designed this way - but after I pump ten or so times, and build up a nice vacum, the release valve starts to let air in, even though it’s tightened the entire way.

Click to expand...
Mine looks quite similar to the one in the link. Does yours have the wire inside the tube/hose? That damn thing had a mind of its own, splattered oil everywhere first time I used it.
 
I do have the wire inside the smallest hose, the one that fits into the dipstick tube.

I have the remote mounted oil filter on this motor. Wonder if I could suck the oil out of those hoses, instead of the dipstick, which I've been battling for past 20 years.
 
Placing the canister as low as possible (in the bilge between the twins) worked better for me.
 
Tey running the motor for atleast 20 minutes. then hook the pump directly to the dipstick with a hose clamp and hose to fit the dipstick. If you have the threaded piece on the duipstick, your pump screws onto it
 
If you have the type of dipstick tube with the garden hose threads at the top end, then use a garden hose adapter (make sure to use the gasket) for the vacuum pump. I use this style and it pumps much faster than shoving that little thin hose down the dipstick tube. I've had the Topsider pump for close to 20 years and it works very well. I only recently had to replace the plastic hoses because they got hard and stiff over time. In this pic you can see the adapter I fabbed up, very easy, you want it to make an air tight seal on the top of your dipstick tube.
 

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Years ago i bought the five gallon bucket type with the pump motor mounted on top. It works great. Hot oil comes out of our big block in just a few minutes...
 
Are you taking off the engine oil fill cap to allow air back in? End of siphon hose cut at an angle, not cut straight across.
 
I have the blue vacuum pump in the picture above. Only 5 minutes per motor if the oil is hot. I would suspect you have a defective pump or a restriction in the pump or hose. If its sucking air, the hose is not reaching down to the oil for some reason. Try sucking water out of a bucket?
Jim
 
I have the Topsider pump too. I’ve replaced the hoses once and I am getting ready to replace them again this year. Other than that it’s been trouble free for 20 years.
 
Try using the thin hose that slides into the dipstick to the bottom of the pan. Takes less than 10 minutes to suck my 454s dry.
 
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