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post #11 of 22 Old 03-19-2014
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Re: how to pull a motor?

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560# straight up with a comealong? man that sounds scary!
I suppose, until you've seen it done. I was a mechanic in the army and out in the field we swapped out a lot of transmissions in big trucks with a come along and a big steel pry bar laying between two supports in the cab. Even the cheap ass come alongs I use to keep in my jeep when I was a kid were rated at 2000 lbs. A small chain fall might be better though depending on the vertical clearance between your motor and the bottom of your lifting beam.
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post #12 of 22 Old 03-19-2014
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Re: how to pull a motor?

Depending on your access, you can also remove a lot of weight before the lift.. manifolds, Heat Exchangers, alternators, brackets will remove weight and reduce bulk for easing the engine out of the space.. If a rebuild is in the works all that has to come off anyhow.

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post #13 of 22 Old 03-20-2014 Thread Starter
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Re: how to pull a motor?

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Originally Posted by Faster View Post
Depending on your access, you can also remove a lot of weight before the lift.. manifolds, Heat Exchangers, alternators, brackets will remove weight and reduce bulk for easing the engine out of the space.. If a rebuild is in the works all that has to come off anyhow.
I kinda want to leave it intact because I have not 'decided' anything and I might want to do a compression test or something before I decide to spring for a rebuild (my cheapness rears its ugly head in odd ways)

today I found a remnant Alum I beam that was perfect and relatively cheap Thought I could make a lifting davit out of it later or something

So I went to harbor freight and got a trolly and chain fall and the damned I beam is a tad too small and so now I'm just agro cuz I spent $200 on this dumb project (with zero result) and feeling cheap about the whole thing (now)

The 1 ton harbor freight trolly is also MASSIVE

I'm thinking I could probably just suspend some iron pipe under the eyes with 3-4 wraps of nylon webbing and call it good - if I was feeling macgyver-y I could prolly weld them together and make my own cheapo I beam (but then I think what a crappy darwin award winning way to die that would be when something snapped)

And then just a pully on the pipe zip line style?


It "seems" like it shouldn't work but I mean I have some 1/8 vectran and tiny harken blocks that can lift my dirt bike into a tree & that stuff's all rated 1000+ lbs MWL

Most of that stuff's got way higher breaking loads than this massive steel trolly What am I missing here?

Last edited by xymotic; 03-20-2014 at 03:03 AM.
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post #14 of 22 Old 03-25-2014
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Re: how to pull a motor?

Xymotic,

Did you say you had access to a crane for pulling masts? I used a hand operated mast crane (chain fall type?), at my marina to lift my Universal 5416 out. It weighs a bit less than your Yanmar, probably 400-450 lbs. I did not try to use the lifting eye(s) on the motor, instead I made up two rope slings that I threaded around the engine and trans, one under the transmission end and one at the front. I put both loops onto the chair hook, and adjusted the lengths to let me lift the rear first, and then the front which then allowed the motor to do a "controlled" swing forward and out of it's "hole" (it was controlled by me sitting on the cabin floor with my feet against the engine). Then it was just lifted up through the companionway. It sounds tricky but was pretty straightforward.

I basically reversed the process to reinstall, pushing the suspended motor back into the hole with my feet while someone operated the crane. Once I had one of the engine mounts engaged I used a short pry bar to move the motor around till the others lined up.

I have removed and installed the engine twice now with this technique and find it pretty easy to do with two people.

HTH
Eric

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post #15 of 22 Old 03-25-2014
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Re: how to pull a motor?

i have removed 2 engines from this ketch of mine..isnt that difficult and i didnt have all that fancy dancy easy cheater stuff. i had me and my muscles, and 2 strong fellas. we used boom and block and tackle lifting system...lol but it took all 3 of us to get her out the overhead hatch which is JUST large enough to remove a torn down 4-108.......
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post #16 of 22 Old 03-26-2014
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Re: how to pull a motor?

by the way,l guys.... i was just yesterday advised my BRAND NEW inside engine will be delivered and installed early to mid may AFTER i enter marina..lol..... seems these guys prefer the other method of install....less bouncy...


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post #17 of 22 Old 03-28-2014
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Re: how to pull a motor?

Very cool thread. Keep em coming


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post #18 of 22 Old 03-28-2014
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Re: how to pull a motor?

check your compression while engine is in boat, then strip damengine so you can actually remove it from boat. 350- 450 pounds is a lot easier to manhandle up and out of a boat than is 600 pounds....TRUST ME... geez i have done this not just once but TWICE and while not at dock. i have been anchored or moored on a mooring when i remove my engines.


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post #19 of 22 Old 03-28-2014
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Re: how to pull a motor?

In the HVAC industry, it's not uncommon to use a portable gantry for replacing large electric motors, compressors, etc.

Available in aluminum, makes it easy to carry (I've roped them up to roofs, dismantled of course). The smaller ones are 1 ton capacity.
You should check local equipment rental yards, like this one:
Gantries | Rent Gantries | ABC Equipment Rental
Typically, you can rent the gantry and trolley without the hoist, if you like, and use your own chainfall, come-along, etc. Use the beam and one trestle, secure free end of beam on properly supported structure. Or adjust height of trestles independently (one in cockpit, the other on the cabin sole. They're quite versatile.

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post #20 of 22 Old 04-01-2014
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Re: how to pull a motor?

I'm hung up on the words "runs flawlessly" and "preventative rebuild". Your business to be sure but 3700 hrs is not a lot for a well maintained diesel. Why not just do an oil analysis, see what that says, then go from there? If normal, why bother? You could have the injectors rebuilt. But why the effort of pulling and rebuilding? If it ain't broke.......
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