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1995 foreman 400 water in engine

3388 Views 16 Replies 5 Participants Last post by  Helmut
Hello, Ive got an issue with a foreman 400 that I cant seem to track down. Somehow water is entering the engine from somewhere. Its definitely water and not condensation. The water and slush this quad runs through is only a couple inches or so deep.
Ive checked the breather tube for damage and routing and Ive replaced the seal on the motor behind the recoil.
There is a speedometer on this machine that looks like it was a optional accessory because its mounted on the rack. The speedo cable plugs into the rear of the engine just in front of the rear left tire. Im suspecting this is where the water is entering.
Ive already disconnected the cable and housing and re-installed using rtv gasket maker but water is still seeping in from somewhere. Im still thinking thats the entry point and have no problem with disconnecting it altogether and covering up the hole with the original cover.
If anyone has had the same issue please respond, Im open to suggestions. Thanks
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dumb question here for you..because i don't know much about the newer any chance is this atv water cooled ?..if it may have a internal leak from the cooling system ?
^^^^^^^agreed and have you checked the air box to see if it is wet or damp?
even if it is wet..or damp..that wouldn't explain the water in the engine just from ridding through a couple inches of again..2 inches of water to one person....might be 4 feet to another !
other than the crank case breather tube.there isn't much more ways water can get into a engine..not from a couple inches anyway...check the crank case breather tube for any cracks..holes..splits..and make sure there is one on it period ! you..or the owner has sunk this bike lately..and like is was stated about still having water in the engine..i don't see any way for water to get into the guess still had water in it from before..and it never got drained out all the way..or..someone just sunk it again couple inches of water won't get inside the least i've never seen it done.
If the owner has got it in some water over 2ft. it could get in around the snorkel at the air box if not sealed well.
ummm..yeah..that will do it ! stated it only ran through a couple inches..sooo..your guess is as good as
^^^^^^^agreed and have you checked the air box to see if it is wet or damp?
Thanks for the quick responses. The motor is air cooled and I have checked the air box. I will check air box again though, I believe there is a breather tube connected somewhere.
Im not the owner of this machine, Im just doing the work on it. Last fall I had two problems to fix at the same time. One was the water in the oil and the other was the shift drum coming apart. Ive had the motor out and on my bench and replaced both left and right hand cover gaskets aswell as that seal on the shaft connecting the recoil.
When the owner drops it off this week, I think Im going to stand it up on end and look it over from the bottom. Im still open to suggestions
i can tell you this..if the breather tube isn't on the lower part of the engine..water can get in it this order for it to do this...the motor would have to go pretty deep ( more than a couple inches )..sooo..unless the owner sank this engine..and got water still traped inside the lower end..and it hasnt been drained out...there is no other way for water to get into the engine..unless there is a bad gasket on either side of the engine ?..or the rear drive shaft seal is leaking ?..or the shifting shaft seal is bad ?..other than these places..i see no other place for water to enter the motor.
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