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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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Old 04-22-2012
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Diesel Engine Replacement

I have a 39'9' 1983 Irwin sloop and need to replace the engine. I plan to hoist the engine out of its bay with a portable winch using the boom (engine on a sloop is directly under the end of the boom) with the main halyard linked for additional weight support. The engine weighs 650lbs and the question is will the boom, support lines and mast support that kind of weight. Has anyone had experience lifting an engine using that technique? Advice appreciated.

Lem
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Old 04-23-2012
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Re: Diesel Engine Replacement

I did it that way a couple of years ago on my previous boat, but the engine was only 250 lbs. If your rig is solid, it should support your heavier engine, but I would still be nervous. You can always rent a portable crane.
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Old 04-23-2012
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Re: Diesel Engine Replacement

Thanks
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Old 04-23-2012
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Re: Diesel Engine Replacement

Maybe rig up something other than a topping lift which was not designed to lift that much weight. Use the halyard attached opposite the load point? To take pressure off the mast at the gooseneck, maybe tie back to something. The gooseneck itself should be ok if it's rugged enough.
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Old 04-23-2012
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Re: Diesel Engine Replacement

Lem,

I'd recommend you think through all the steps before you start -- not suggesting that you haven't.

Once you get the engine clear of the interior of the boat, how are you going to get it over the side? Will the boom (with engine slung under) be able to swing outboard far enough to allow you to drop the block onto the dock or ground?

If you are going to need to hire a crane or lift anyway, it may be easier, cheaper, and less stressful to just use it for the whole job.
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Old 04-23-2012
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Re: Diesel Engine Replacement

You can drop a lot of weight by disassembling alternator, heat exchanger, starter, manifold, even the cyl head...all sorts of odds and sods prior to lifting it out.. it also makes for a smaller package, easier to manoeuvre out the hatch.
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Old 04-23-2012
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Re: Diesel Engine Replacement

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Originally Posted by Faster View Post
You can drop a lot of weight by disassembling alternator, heat exchanger, starter, manifold, even the cyl head...all sorts of odds and sods prior to lifting it out.. it also makes for a smaller package, easier to manoeuvre out the hatch.
Yes, maybe even the gear box. My Yanmar 3GM only weighs half the weight of the OP's motor. I wonder what kind?
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Old 04-23-2012
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Re: Diesel Engine Replacement

Thanks to all for the feedback. In reply to the last post the engine is a 1983 yanmar 3Qm30 Lem
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Old 04-23-2012
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Re: Diesel Engine Replacement

Another item to check is will the block and tackle or chain fall be long enough to lower the engine all the way to ground after you get it up and out the then swung over the side. It's a long way down and the typical rig isn't long enough. Found that out the hard way.
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Old 04-24-2012
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Re: Diesel Engine Replacement

On reinstalling my yanmar engine, any tips or guidance on aligning the gearbox and the shaft? Thanks Lem
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