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Old 03-23-2018, 07:07 PM   #1
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Genset lift ideas for mount replacement

New engine mounts arrived from Greece yesterday so I am thinking of ways to jack up the genset.

Thinking along the lines of the airbag jacks that plug into exhaust on 4x4 - what about a fender?

Let air out, slide under genset, pump up fender with 12v compressor leaving old mounts in place, pack genset with ply/timber and replace mounts.

Theory being genset lifted back to where old mounts would have been before they collapsed making new mount adjustment simple.



Thoughts?
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Old 03-23-2018, 07:19 PM   #2
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3 ft crowbar and some blocks. Do one at a time. Wedges would also work.
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Old 03-23-2018, 07:59 PM   #3
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One of my neighbors with a Bayliner 4588 had to lift their genset to get to the leaking oil pan. They constructed a frame out of inexpensive pine timber to fit,and used block and tackle to lift the genset on the frame.
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Old 03-23-2018, 08:18 PM   #4
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Only undo the mounts at one end, use an automotive bottle jack and some lumber as a base to jack up the disconnected end and replace those 2 mounts. After the first 2 mounts are bolted in place, repeat the process at the other end.

Ted
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Old 03-23-2018, 08:24 PM   #5
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Should add, living aboard so no shops, no 3 ft crowbar, no wooden frame or block and tackle(or space above to use it) and no bottle jack (or space under to use it)

But i do have a fender and a 12v pump. (-;
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Old 03-23-2018, 08:27 PM   #6
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Should add, living aboard so no shops, no 3 ft crowbar, no wooden frame, no block and tackle and no bottle jack (or space under to use it)

But i do have a fender and a 12v pump. (-;
Do as I suggested but use the fender as lift. Easier to lift only one end at a time, also more stable.

Ted
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Old 03-24-2018, 07:00 AM   #7
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How about a 2x4 across the hatch and a small block & tackle to pull up one side.
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Old 03-24-2018, 07:10 AM   #8
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As my shop teacher would say, “If you don’t have what you need, improvise.”
Try the fender. Just keep the bolts loose on one end so you keep everything under control.
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Old 03-25-2018, 09:49 PM   #9
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How much does the gen set weigh, and how much pressure will your fender hold?
Don’t know what it looks like in there, but if it’s on the vessels centerline between stringers, you might be able to use two fenders so it’s more stable.
You still might want to support it from above once it is lifted, remember that your fingers are at risk here!
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Old 03-25-2018, 10:15 PM   #10
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Fender didnt work, fittings wouldn't let me get enough pressure in it to lift 200kg.

It'll have to wait until next on the hard.
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Old 03-25-2018, 10:21 PM   #11
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That's not very heavy - prybar.
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Old 03-25-2018, 10:30 PM   #12
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That's not very heavy - prybar.
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Old 03-25-2018, 11:15 PM   #13
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How much height do you need ?


( and you can get a 36 inch pry bar for 12 bucks at Home Depot )
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Old 03-25-2018, 11:38 PM   #14
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I changed motor mounts on a 1500 lb Gray Marine Diesel using a box full of 4” long blocks of 2x4 and 1x2 lumber and a 4 ft chunk of 2x4 as a lever. One end at a time, stack blocks to make the fulcrum, lift an inch by sitting on the lever, stack more blocks under motor or gearbox, release, and repeat until high enough. A pry bar would work too, but sitting on the 2x4 easy, depending of course on access. Keep fulcrum close as possible, raise in small increments. Easier and much safer than block and tackle.
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Old 03-26-2018, 12:10 AM   #15
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Quote:
Originally Posted by Benthic2 View Post
How much height do you need ?


( and you can get a 36 inch pry bar for 12 bucks at Home Depot )
Post 5.

Quote:
Originally Posted by Simi 60 View Post
Should add, living aboard so no shops, no 3 ft crowbar, no wooden frame or block and tackle(or space above to use it) and no bottle jack (or space under to use it)

;
Plus Australia, no home depot here.
Bunning's or super cheap auto.
I have one at the dirt house so it'll wait until we come out next.
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Old 03-26-2018, 05:37 AM   #16
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I'm trying to think of a way to mcguiver a jack using some long bolts and nuts. Maybe some kind of scissor action with a 2x4 or other stout couple of objects?
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Old 03-26-2018, 07:30 PM   #17
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Think like an Egyptian. Levers and inclined planes are your friends.
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Old 03-26-2018, 08:13 PM   #18
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How much height do you need ?
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Old 03-26-2018, 10:14 PM   #19
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What about getting a bunch of wedges and drive some on one side and then next to the first wedge drive a taller one in and alternate between the two. Doesn’t need much room or much in the way of tools.
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Old 03-26-2018, 11:47 PM   #20
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Quote:
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How much height do you need ?
Couple of inches.
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