Yanmar 3YM20 Regular Service Cost? - SailNet Community
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post #1 of 13 Old 04-11-2016 Thread Starter
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Yanmar 3YM20 Regular Service Cost?

Hello,

Curious to know what a generally fair cost for doing regular maintenance on a very easy to access Yanmar 20CH Engine with 100hrs. That is:

- Oil replacement
- Filters replacement
- Belts, impeller, etc checks

I am not looking for the cheapest guy in town but I don't want to be gouge either. I have been quoted 2.5 hrs to 4.5 hrs of labor for this, 4.5hrs seems a lot....

Thanks.

T.
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post #2 of 13 Old 04-11-2016
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Re: Yanmar 3YM20 Regular Service Cost?

This doesn't really answer your question, but...

My knowledge of diesel engines is limited to knowing that they make some rumbling noises and can be used to propel the boat if the wind dies. But I am still able to do all the tasks you list fairly easily. I know that just having it done can be nice, but certainly things like changing the impeller and dealing with belts seems like something that you would want to be comfortable doing yourself in case they were ever a problem away from the dock.

To try to answer your question more directly, it doesn't take me 4.5 hours to change oil, filters, impeller and check belts and such.
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post #3 of 13 Old 04-11-2016
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Re: Yanmar 3YM20 Regular Service Cost?

I would have to agree with Mr. F. above. The items you listed, I think, would be user level maintenance.

For an oil change, get one of these extraction pumps. I have one and it works out really well.

Get some oil absorbent sheets to wipe up any oil/diesel that spills out.

just replace the impeller.

for belts, just check and make sure they are not getting damaged, worn, and not old/cracked.

Just be sure to have spares on board in case something happens when you're away from the dock and any help. Do the basic maintenance enough, and it won't take very long to do.

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Re: Yanmar 3YM20 Regular Service Cost?

for someone with experience, and a pro should be, it should not take any longer then 1.5 hours for the oil change. impeller takes about hour. may take a little longer on the first time. the pros will quote a little longer to cover bringing there stuff to and from your boat and they don't know the condition of your engine and access they have until they see it.
I have the same engine and it takes me less then 15 min. to remove the oil with the extraction pump and 5 min to put in 2.5 qts, of oil. filter maybe 10 min.

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post #5 of 13 Old 04-11-2016
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Re: Yanmar 3YM20 Regular Service Cost?

Parts are probably $100 to $150, 2.5 hours more than enough time. As you may have gathered, most of us are clueless because we don't TRUST someone else to do this work. It's all pretty easy but also easy to screw up, it's the only time you'll be "up close" to your engine so you can inspect and check for leaks and potential problems. Most of the work is stuff you MIGHT have to do in a pinch while at sea and so many consider them essential skills that they like to be familiar with. Changing or draining a fuel filter, bleeding the fuel system, changing an impellor are all things you'll end up having to do "on the fly" at some point.

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Re: Yanmar 3YM20 Regular Service Cost?

Thanks all for responding and passing along useful advice. I am actually pretty handy and do regular maintenance on my motorcycle myself but marine engines are new to me and I was actually a bit intimidated by the oil extraction process... so thanks to Rhaphsody-NS27 for passing on the oil pump tip. The Yanmar 3YM20 on my boat is so easy to access and so is the impeller that I also doubt it could take more than 2 hrs to get this done.

Take care,

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Re: Yanmar 3YM20 Regular Service Cost?

Nice 349!
Mosey on over to Jeanneau 349 and introduce yourself!
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Re: Yanmar 3YM20 Regular Service Cost?

Hey Weinie, that's Thierry from Jeanneau 349... I guess I'll have to start the oil change thread in the forum "Maintenance" topic
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Re: Yanmar 3YM20 Regular Service Cost?

For a better answer as to how long, just time yourself. Second time will be better. Many engines have a built on oil pump Makes it so easy
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Re: Yanmar 3YM20 Regular Service Cost?

the 3YM20 does not have a pump built in but the dip stick tube is connected to the lowest part of the oil sump so connecting an oil extractor pump to the dip stick tube works very well and will remove all the oil in 2 min. It only holds 2.5 qt but warm the engine oil and it will pump out very easy. While you are checking things take a look at the Stainless steel exhaust elbow where it is welded to the flange there have been reports of cracks developing as early as 100 hours. I know of three cases myself. but mine has not cracked.

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