I have a 14 foot boat which due to a minor accident capsized in the sea taking the outboard with it.<br /><br />The engine (model 30AM) spent about 20 minutes under the sea water and was recovered.<br /><br />I washed with thoroughly with fresh water, turned it over with no plugs in it, filled the bores with WD40 and pulled it over (I did this about 10 times). I removed the excess water by using WD40 all over the electrics etc...<br /><br />I flushed out the carbs with WD40 and cleaned the fuel lines and filter out. <br /><br />With fresh fuel, incredibly, it coughed, spluttered and came to life again!<br /><br />Now the problem - ever since it happened the engine runs rough, dies when idling and won't idle in gear for more than a few seconds. At high engine speeds it seems to run well but at low speeds it mis-fires coughs out smoke and runs badly often dying and very hard to re-start.<br /><br />I've cleaned the carb out very thoroughly again with carb-cleaner including the jets, put new spark plugs in it, checked all the wiring, checked the fuel pump diaphragm... I can't get the fly-wheel off but I don't think it uses contact-breakers anyway.<br /><br />Any ideas what else I might check? I am at a loss to think what else to try. Before its little swim the engine was smooth and sweet giving no problems at all.<br /><br />Thanks