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Old 23 June 2009, 17:40   #1
Country: Ireland
Length: 5m +
Join Date: Nov 2006
Posts: 90
help with submerged engine

My 4 hp outboard fell off the transom, grabbed it straight away not before it submerged for about 20 seconds, has anyone any advice as to what I should do. I have drained the petrol 4stroke, drained the oil,

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Old 23 June 2009, 18:05   #2
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Was it running?

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Old 23 June 2009, 18:54   #3
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Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 12,768
Salt or fresh water?

If salt,you need to get on it NOW-this second-or it'll seize solid very very quickly. Get the plugs out.Bin them.Get the carb off then flush the inside of the engine out with fresh water in through the plughole and crankcase (or fully submerge it in fresh water would be better if you can), turning it over VERY SLOWLY AND GENTLY by hand til all the salt is out of it. If it locks up, don't force it, hold it up to drain it and start again.
Empty the water out then chuck a load of Wynns Dryfuel in through the plug and crankcase mouth.
Turn the engine over slowly til the dryfuel has all come out. Flush it through with a bit of premixed fuel (it'll be a bugger to start if you've got dryfuel with a lot of water absorbed in it still inside)

Strip the carb, flush all the components of it with fresh water, blow all the passages through with WD40 and dry it.

Open all the electrical connections,dry them and spray with WD40 or the like too.

Oh, and don't turn the engine over with the killcord on-you really don't want a spark...
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