Hi; I have a yanmar 3gmf and change oil in the engine by inserting a small tube into the dipstick hole and pumping the oil out. The problem is I can't seem to get the tube down far enough to get more than about 2 or 2 1/2 litres of old oil out. The tube I'm inserting seems to hit something and will not go all the way to the bottom of the oil pan. Solution anyone? Thanks.
Yanmar 3GMF oil change
- Thread starter nemo99
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A 3GM only holds 2.6L and that includes the filter. So when you pull out 2.5L you are pretty much there except for what is in the filter.
Engine Manual on line:
http://ayesail.net/sailing/Hunter/YanmarManual/Yanmar_Manual.html
Engine Manual on line:
http://ayesail.net/sailing/Hunter/YanmarManual/Yanmar_Manual.html
Nemo, I have the same engine and you are probably hitting the bottom of the oil pan. Problem is that unless you can get the tube to bend to go to the aft end of the pan, ya can’t get all the oil out since the engine is slanted down aft.. This winter, I had removing the pan and installing a low point drain on my list, but haven’t gotten there yet. Many engines have a tube that the dipstick goes into that works as an effective guide for the oil removal tube, but this engine does not have the internal guide tube and the oil removal tube can go all over the place in there if it is flexible!
One trick I learned is to mark the tube at the same length as the dipstick so you can see when the tube is close to bottom of the pan.
Take a look at this recent thread http://forums.hunter.sailboatowners.com/showthread.php?t=103918 and you will see a picture of what your tube is hitting and a solution to your problem.
Andy
You can use any thread fitting you like, NPT, Metric...so long as you match the tap to the fitting thread. Removing the pan is simple after you've sucked out the oil for the last time. Remove the 6mm bolts that hold the pan in place and drill a hole at the back of the oil pan then tap it. You can use a drain plug or a petcock. I opted to use a petcock so that I don't need tools and the petcock doesn't need to be removed. I then slide a one gallon anti freeze jug laying on its side with a cutout under the engine and open the petcock. You could also use a disposable aluminum baking pan to catch the oil.
I couldn't foresee anything damaging or breaking either a petcock or a drain plug. There is absolutely nothing under there to do any damage.
For the life of me I just can't understand why anyone would want to go through the hassle and mess of extracting waste oil when gravity will do the job so much easier and completely.
You can use any thread fitting you like, NPT, Metric...so long as you match the tap to the fitting thread. Removing the pan is simple after you've sucked out the oil for the last time. Remove the 6mm bolts that hold the pan in place and drill a hole at the back of the oil pan then tap it. You can use a drain plug or a petcock. I opted to use a petcock so that I don't need tools and the petcock doesn't need to be removed. I then slide a one gallon anti freeze jug laying on its side with a cutout under the engine and open the petcock. You could also use a disposable aluminum baking pan to catch the oil.
I couldn't foresee anything damaging or breaking either a petcock or a drain plug. There is absolutely nothing under there to do any damage.
For the life of me I just can't understand why anyone would want to go through the hassle and mess of extracting waste oil when gravity will do the job so much easier and completely.
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