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Old 30 September 2010, 16:41   #1
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immersed engine

ok, so this is an 'in theory' question.
just thinking if horror of horrors, the engine ended up in the drink, is there a proceedure to go through to hopefully recover it? or are they considered totalled?

also i presume in freshwater, the damage is not so bad?

just nice to know just in case!!
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Old 30 September 2010, 16:57   #2
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If it gets immersed in salt water the first job is to immerse it in fresh water and leave half a day or so. Next step lift it out, remove plugs and turn it over by hand to pump water out the cylinders. Then go down the shop and buy several large cans of wd40 or similar
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Old 30 September 2010, 17:55   #3
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All small engines I've owned have a section in the owners manual which describes what to do in the event of immersion. Its pretty much as Martini suggests (except they usually suggest getting it to a main dealer as soon as possible too!).

The major issue will be if it was still turning when it sucked in water as it doesn't compress and bends bits that shouldn't bend.
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Old 30 September 2010, 18:07   #4
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what are we talking 'theory' wise here... a quick dunk of a big un .. or a seagull thats been on the ocean floor all season .. cos that bas**d will still start .. and on the bright side you can still get reverse .....
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Old 30 September 2010, 19:30   #5
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My experience of larger engines getting dunked are that they can easily be got running again (except newer motors will need new ecu) but best get shot of it asap. It's once the motors dried out that the real problems start. Ignition stator starts corroding, electric motors eg trim pump etc pack up, moisture creeps up the inside of all your wiring insulation causing resistance, bad connections etc. There will always be a tiny bit of salt left in the motor no matter how hard you try, this invariably ends up at the bottom of the powerhead, right where the bottom crank bearing is so that'll start rattling it's head off after a few hours.

You often see motors that got wet for sale, they did this that and the other and it all works fine, bargain? No, you'll pay in the long run

Do I sound slightly bitter there?!
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Old 01 October 2010, 03:00   #6
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so out of choice, you would not buy an engine that had been submerged then?
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Old 01 October 2010, 03:54   #7
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Originally Posted by markymarkP View Post
so out of choice, you would not buy an engine that had been submerged then?
Read this. Still makes me smile. http://rib.net/forum/showthread.php?...covered+engine
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Old 01 October 2010, 04:12   #8
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Submerged engine

Shame he never got it finished though! Would have been interesting to see if it would run again.
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Old 01 October 2010, 04:15   #9
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Speaking as a racer where this does happen, this is usually a result of a boat going over or sinking backside first. The first thing to do is cut the power, 12 volts just makes things worse. With old school motors, drain the carbs, take the plugs out and hose everything down, turn the motor over with lots of water repellent spray - once you've done all that reassemble and get it started.

A mate of mine lost his XR2 in a Scottish loch for a couple of weeks (it was attached to a Phantom 18 at the time) - it was recovered by a fisherman in his nets. The engine was put in a barrel of diesel after removing as many bits as possible and it went on to give lots of good service afterwards!
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Old 01 October 2010, 05:01   #10
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I've pulled a few engines out of the drink,
left them in fresh water for a while,
stripped them down completely and then rebuilt them (Got to love gasket glue).

Engine fired but I didn't keep them long enough to see if any long term ill effects materialised.

No compliants from the recipients though....

Maybe they went down with all hands.... :/
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