Yanmar 3YM20 Oil Extraction

[ChiPete]

Hi All,

Further to a bit of a disaster with my engine service last year, being keen to save a couple of hundred quid and of course ''bond'' with my engine, I'm doing the service myself this year

Now, first (of probably many!) questions. The 3YM20 has an engine oil capacity of 2.7 litres. Try as I might, I cannot get more than a litre of old oil out. I'm using a Pela extractor (wish I'd read the YM review about being slooooow before I bought!) with the pipe running down the dipstick hole. The extractor pipe gets so far into the sump and then stops , possibly touching a baffle plate. The engine is angled at 8 degrees so I really need to be able to get to the aft of the sump.

Is there a specific way of getting close the majority of the oil out? I appreciate I should allow for perhaps 0.3-0.5 litres in the oil filter.

Thanks for any help in advance.

Coming soon - bleeding Bleeding!

 

[Cloven]

Be careful you don't push the Pela extractor pipe too far into the sump. It is very easy to push it so it goes down & then back up so you end up with with the end of the pipe above the oil level, particularly as the oil level drops. It should not go too much further in than the depth of the dipstick. You will find that as you extract oil, the filter will drain to some extent and will not be full when you take it off. However, you will get some residue so be prepared for that.

The second idea, if you are not already doing it, is to remove the metal braided part of the pipe and just use the clear plastic part as the ID of the former is very small.

Yes it can be tedious but I normally can get the full 2 litres out of my 2GM this way although it can take up to 30 mins pumping!!

 

[prv]

Do make sure the engine is nice and warm so that the oil runs freely </eggsucking>

Pete

 

[Twister_Ken]

Echo the advice about not pushing it in too far.

Watched a pro do the first service on my 3YM20 and he had no problem extracting a lot of oil with a Pela. He did take the filler cap off first (might help?). He also wrapped a rag around the pipe at the top of the dipstick hole, but I suspect this was to soak up any oil drops when he pulled it out, rather than help create a seal.

 

[ChiPete]

Thanks for the replies all.

Yup, I ran the engine at a fast idle for 5 mins.

I'll try the not pushing it in too far (oooer!) idea. I'll check the length of hose against the dipstick tube and use that to gauge.

Looks like another appointment with Mr Pela!

Thanks again,
Pete

 

[alan17]

Oil extraction

Running the engine for 5 minutes with no load is nowhere near long enough. Even with boat still in water I run engine for at least 30 minutes in gear and driving against warps.

Diesels take a long time to warm up enough to make the oil thin enough to extract easily.

 

[rafiki_]

The Pela is a good bit of kit, so don't worry about that. 5 mins is way too short to run the engine. I ran my engines for 30 mins, and it still took 30 mins to draw the oil out of each. If there is no oil showing on the dipstick, when you dip normally, then you will not get much more out. I had to remove the sump plug on 1 of my engines, and there was a mere dribble that fell out after the Pela had done its business.

I would add fresh oil and a new filter on now and see what the oil looks like. If it is clear after you have run the engine up, then you are in the pound seats.

 

[Twister_Ken]

Sorry gents, but when Marine Power serviced my YM20 if they ran it for more than 5 minutes it was only by another minute or two.

 

[Captain Bligh]

when you get oil out rig up a pipe from the sump plug so gravity does the job. you could get a flex S/S braided hose if the plug is in a bad position.

standard thread. sucking oil out like this is a disaster. then every other time open plug on pipe and drink tea while Mr. Gravity does the work for you.

 

[charles_reed]

Hi All,

Further to a bit of a disaster with my engine service last year, being keen to save a couple of hundred quid and of course ''bond'' with my engine, I'm doing the service myself this year

Now, first (of probably many!) questions. The 3YM20 has an engine oil capacity of 2.7 litres. Try as I might, I cannot get more than a litre of old oil out. I'm using a Pela extractor (wish I'd read the YM review about being slooooow before I bought!) with the pipe running down the dipstick hole. The extractor pipe gets so far into the sump and then stops , possibly touching a baffle plate. The engine is angled at 8 degrees so I really need to be able to get to the aft of the sump.

Is there a specific way of getting close the majority of the oil out? I appreciate I should allow for perhaps 0.3-0.5 litres in the oil filter.

Thanks for any help in advance.

Coming soon - bleeding Bleeding!

I've had a 3YM20 for about 1400 hrs, during that time I've done all the 9 services on it myself.

Three comments -
1. 5' at tickover is totally inadequate to warm the oil sufficiently for extraction in UK temperatures. You need to have done about 3 hours work and then to leave it for about 20' to cool sufficiently to work on, and for all the oil to run into the sump.
2. Beware pushing the suction tube hard down, it won't turn back up again but it will block the hole into the sump, from the dipstick chamber and get itself stuck to the bottom.
3. The 2.4 litres includes the 0.5 litre in the filter.

I find that putting the end of the Pela end, giving it 20-25 strokes and leaving it for 4-5 minutes clears all the sump oil.

Far more difficult than the engine oil. is the gearbox. That oil never gets hot enough to flow freely - even when I dispense with the dipstick probe.