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Old 18-01-2014, 07:27   #1
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Oil change 4JH4AE Yanmah

I have had a second hand Yanmar 4jh4ae fitted to my Tayana Vancouver recently. The (expletive) Texan from Guatemala got the engine in very well considering the very limited space however he neglected to fit a suitable fitting to enable me to change the oil. I am able to put a 1/4 " plastic pipe down the dip stick hole without much success with a hand pump. Can anyone help with the location of the sump drain plug ?. Because of VERY limited space I may need a very very small person to find it or fit a suitable fitting. In the meantime I am finding it almost impossible to extract the old oil. Any help will be greatly appreciated .
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Old 18-01-2014, 07:37   #2
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Re: Oil change 4JH4AE Yanmah

The vacuum oil extractors work well.
Make sure the oil is hot and the you loosen the oil cap otherwise the air seal will stop the oil flow.

This thread has some photos that may be of some help:
Yanmar 4JH4AE oil plug adaptor to Jabsco 17820

You can remove the nut at the bottom of the dipstick tube as an alternative to the oil extractor, but in most installations this is difficult to access.
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Old 18-01-2014, 07:54   #3
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Re: Oil change 4JH4AE Yanmah

I use one of the suction pumps mentioned above on a 4JH4 and it works very well. Quick, no spill, and easy. The old oil ends up safely stored.

WEST MARINE Manual Oil Changer - 6.9 Quart at West Marine

Because the dip stick tube connects to the very bottom of the oil pan on my engine, I don't use a small tube inside the dipstick but instead tape the larger rubber tube to the top of dip stick tube itself and let the vacuum draw the oil up the tube. The larger diameter tube empties the oil very quickly and leaves only a tiny bit of oil still in the sump.
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oil, oil change

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