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post #1 of 11 Old 12-28-2012 Thread Starter
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Yanmar 2GM20F

Pulling the motor out today. I was wondering if anyone knows if it is safe to rest the motor on the oil pan. The pan looks like it might be able to do that.
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post #2 of 11 Old 12-29-2012
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Re: Yanmar 2GM20F

I would be very surprised indeed if it was a problem.
It would be a monumental design failing if it were.
Lay some wood down first, anyway.
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post #3 of 11 Old 12-29-2012
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Re: Yanmar 2GM20F

I would be more worried about disturbing the pan gasket than the pan breaking. Not terribly worried about either. After the rebuild, I wouldn't place it down on the pan. On the way out, I would not be worried.


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Re: Yanmar 2GM20F

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I would be more worried about disturbing the pan gasket than the pan breaking. Not terribly worried about either. After the rebuild, I wouldn't place it down on the pan. On the way out, I would not be worried.
Good point about the gasket, I wasn't even thinking about that. Might as well build a stand now. Thanks
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Re: Yanmar 2GM20F

So what turned out to be the master plan? Fully rebuild? Doing it yourself?


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post #6 of 11 Old 12-29-2012
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Re: Yanmar 2GM20F

When I removed my Yanmar 2GM, I built a 2x4 frame that just matched up with the motor base. Then I just had to slide the motor forward onto the frame. You may or may not have access to make this work but it was quite a simple operation.

Have fun
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post #7 of 11 Old 12-29-2012 Thread Starter
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Re: Yanmar 2GM20F

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So what turned out to be the master plan? Fully rebuild? Doing it yourself?
Jut pulled the engine out myself yesterday. It's in the back of my pickup now. I am not sure it's worth it for me to take on the rebuild. I promised my wife that I would renovate the bathroom this winter. Even though I rebuilt a 4cylinder gas engine in my teens I consider myself a novice at that. Given a choice I would probably rather work on the engine if I had all the fancy measuring tools. So, I am leaning towards full rebuild by a erengine rebuilder machine shop.

Last edited by 73Morgan; 12-29-2012 at 05:32 PM.
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post #8 of 11 Old 12-29-2012 Thread Starter
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Re: Yanmar 2GM20F

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When I removed my Yanmar 2GM, I built a 2x4 frame that just matched up with the motor base. Then I just had to slide the motor forward onto the frame. You may or may not have access to make this work but it was quite a simple operation.

Have fun
Yep, that's what I did, and added a cross member to sit on so I could raise the engine off the engine mounting bolts while I was hoisting it up from the boom. Made friends with the rigger at the yard. While I was lowering the engine into my pickup, he came buy and said "You are doing that by yourself, I see that the Fearless name on the boat is quite appropriate." I told him "The boat is Fearless, I am quite nervous. The boat will let the owner do any doom thing he wants." 1 hour later we were still exchanging adventure stories.

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post #9 of 11 Old 12-29-2012
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Re: Yanmar 2GM20F

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I promised my wife that I would renovate the bathroom this winter.
I've got one bathroom done already (just barely in time for the in-law visit at Christmas). Got another bathroom to go this winter and then it's on to the boat.

OTOH, I'm turning the hot tub over to the service store. I'm out of time to do everything, and work a full time job, so I feel your pain.
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Re: Yanmar 2GM20F

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..........I am leaning towards full rebuild by a erengine rebuilder machine shop.
Be sure you know what they are going to do. A cheap rebuild is a waste of every dollar. The paradox with a rebuild is that you really want to get everything back to near new, while you have it out. You wouldn't want to pull it again, would you? However, a good rebuild can cost well more than half the value of the motor.

One way to save some money is to do the disassembly and reassembly yourself, if you have the skill and manuals. Outsource the machinist stuff that requires special tooling.

Another strategy is to go find your exact motor in excellent used condition, which would be much less expensive than a rebuild.

If you want to be decadent, consider buying a new one and seeing if they will take your core on trade. Puts you back together, worry free.


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