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Old 08-22-2018, 07:06 PM   #1
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Yanmar YM30 questions.

Hello,

We are looking at a trailerable trawler that has a Yanmar YM30 engine with 925 hours on it. I am not familiar with Yanmars and was hoping to find someone familiar with them to give me some ideas of how reliable they are, maintainance issues and overall impressions.

Thanks,

Keith and Katie Olive
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Old 08-22-2018, 07:48 PM   #2
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3YM30 Service Advisory
Attached Files
File Type: pdf Yanmar 3YM30.pdf (47.9 KB, 23 views)
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Old 08-22-2018, 08:41 PM   #3
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I had a similar but a bit older Yanmar in my first trawler. A Yanmar 3HM35F.

The only maintenance problem was a small easily fixed seawater leak on the front of the manifold. Also There was a light harmonic vibration I didn’t like but I think that came from the hull structure. The Yanmar engine mounts were very soft.

Not as quiet as my present engine but I liked it and wouldn’t hesitate to buy another based on this experience.
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Old 08-22-2018, 08:47 PM   #4
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Thanks Eric.

I am checking the serial number to see if the Yanmar advisory applies to this engine as well.
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Old 08-22-2018, 09:09 PM   #5
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100% reliability on mine. Simple engine and easy to maintain. Quick starting. Parts readily available.

I started the engine once without opening seacock. Impeller wasn't happy. Found the pieces in the front of the heat exchanger. It's a small engine so not a lot of room to swing wrenches but technically it was a simple job. It's based upon the 3GM so a lot of repair/maintenance info on the web.

Wouldn't hesitate to cross the Atlantic with it.
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Old 08-22-2018, 09:11 PM   #6
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SoWhat,

Thanks for the info! Nice to hear. What boat do you have your in?

Keith
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Old 08-22-2018, 09:14 PM   #7
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We have one in IRENE, which we have NOT owned for too long. I have done some considerable reading and general maintenance on her, and I have yet to find anything undesirable. It has less than 40 hours on it, but I am adding a few per month.

A family member has this engine in a piece of construction equipment. He says it runs at WOT all day efficiently and without complaint (probably a different WOT than our marine applications).

Should be a dependable motor...
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Old 08-25-2018, 06:22 PM   #8
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This is wonderful to read! Can't stay away from the water...
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Old 08-25-2018, 06:29 PM   #9
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Melissa, no kidding! It is very difficult.
We are trying to figure out if we can still do this just in a different fashion maybe.
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Old 08-25-2018, 07:43 PM   #10
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Hope it’s an Allbin 25 Keith.
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Old 08-25-2018, 08:50 PM   #11
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Quote:
Originally Posted by kolive View Post
SoWhat,
Thanks for the info! Nice to hear. What boat do you have your in?
Keith
Ericson 31 cutter rig. Now have twin Lehman P90's in my trawler. Also simple, reliable and easy to maintain although maintenance is a little more frequent.

Remembered tweaking the prop pitch to get max speed out of 3YM. Prior prop hit max rpm but I wasn't convinced I was getting enough speed. I used to run it all day at 1800 rpm. Never missed a beat.

Recommend installing a racor to separate out water from fuel if boat doesn't have one already.
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Old 08-25-2018, 09:51 PM   #12
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Thanks SoWhat. Nice to get info like this from the forum.

Eric, yes we are looking at the A25 again. Havenít decided how done we are with boating, kind of hard to stop cruising.
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Old 08-25-2018, 10:05 PM   #13
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Think’in along those lines too Keith.
The A25 is one of the best boats ever built.
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Old 08-25-2018, 11:52 PM   #14
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Eric,

I think it is too. We have always looked at our time with an A25 as some of the best.
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