Swamped 420 - Honda ATV Forum
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post #1 of 6 (permalink) Old 12-03-2018, 05:17 PM Thread Starter
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Swamped 420

So I snorkeled my 420 a couple weeks back but apparently I had a leak somewhere which allowed water to get into my motor. I'm wondering what is the best process to flush the motor. I've flushed it with cheap oil 3 times now but I still have water in the motor, is it just going to take more oil changes to get it out or is there an easier way?
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post #2 of 6 (permalink) Old 12-03-2018, 06:41 PM
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easy way ?, no such thing as an easy way to fix a sunken motor. the CORRECT way ?, pull motor, split motor, clean it all out by hand. if you do not do this ?, well..i'll just give you a prayer..cuz your gonna need it !.
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post #3 of 6 (permalink) Old 12-03-2018, 07:07 PM
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first off welcome to the site
and sadly, there is NO way to fully be sure all Crap that went into a motor once sunk comes out ,
other than split cases and hysically clean things out!
as its NOT just water that gets in when sunk and its the crap that tends to eat parts in a motor more than the water, neither one is good in a motor, but?? getting water out is ONLY half the game here!

MANY folks , do flush with other things like diesel fuel, kerosene, and of course motor oil
but all that does is MAYBE get some stuff out, its NOT 100% by any means and what I call a gamble, some times you win, many times you don't
its just part of the game when you ride an atv like its a boat
for most folks, a few flushes are all they do and away they go, as odds are, sooner or later they will again SINK it, so they don;'t bother doing it RIGHT by tearing down motor
they just run till it needs motor work and rebuild and repeat the game
as they say, you have to PAY to PLAY
NOT what you want to hear I am sure
but honest info here and above !

a RIGHT way and then a GAMBLES way
feel; lucky LOL
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post #4 of 6 (permalink) Old 12-03-2018, 07:40 PM
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Swamped 420

Was the water cleanish water or like, muddy water? If it was pretty clean water Id just take a chance and keep flushing it, diesel works pretty good, let it turn over a few times drain and repeat, then cheap oil.

If it was muddy water, pull the motor and split the cases.


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post #5 of 6 (permalink) Old 12-04-2018, 08:22 AM Thread Starter
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Water was muddy and the oil was a brownish gray color when I first drained it.
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post #6 of 6 (permalink) Old 12-04-2018, 09:14 AM
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Split cases and clean it out or you'll be replacing your top end AND your crank
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