[Moose39]

Hi I’m moose39 . I have a 2006 Honda Rancher 350 . The guy I bought it from said he swamped it in a West Virginia river it would run fine but smoke like crazy so I get it home put new head,piston,rings gaskets ,plug in the quad but it would still smoke so I took it back down honed the new cylinder and reset valves new gaskets and rings again fired it up today and still smoking like a dang train ? I’m lost any help would be appreciated oh yeah secondary question battery was in good shape now it’s not even strong enough to use the electronic shift after jumping off don’t have a battery tester but thought that’s odd

 

[shadetree]

hate to break it to ya, but unless you remove the motor, split the motor, clean it all out ?, your just wasting time and money.

 

[Moose39]

Just clean it out or would you need to replace anything to stop the smoke?

 

[retro]

You might need to replace the crankshaft too, or have it rebuilt with a new rod kit, if the rod got bent when the motor ingested water. If the motor was running when it went down, odds are that the connecting rod got bent. Sometimes you can't see the bend in the end of them, so if you have any doubts, replace it.

You'll need to split the cases and clean everything real good. Replace bearings if they began to rust or were damaged by the grit in the water and replace all oil seals and gaskets. Mr. crankshaft can rebuild your crank for ya with a Vesrah rod kit, or you can replace with new. You'll need to replace both valve seals in the head and have the cylinder checked for cracks (water don't compress, it bends/breaks stuff instantly) and measured to see if it is any good yet.

Don't work on it without a copy of the service manual open on the bench.

 

[mrbb]

Just clean it out or would you need to replace anything to stop the smoke?

the only way this question can be answered honestly is, AFTER its opened up you inspect all parts and look for one's that are damaged or out of spec, and then they will need to be replaced
crap in a motor and then running motor can destroy lots of things pretty fast
some times folks get lucky and damages are small, some times NOT
only way to know is open, clean and looks and inspect things!

 

[Moose39]

Thanks guys I already replaced the jug,piston,rings the valves look good I filled them up and they didn’t leak down but I guess they could still be bad ? so buying a new head probably won’t help me huh

 

[shadetree]

Thanks guys I already replaced the jug,piston,rings the valves look good I filled them up and they didn’t leak down but I guess they could still be bad ? so buying a new head probably won’t help me huh

no, your wasting time and money until you rip that motor out, apart and start cleaning and inspecting parts. no good thing comes to a sunk motor !.

 

[retro]

Replace the two valve seals, not the head & valves. Number 1 on the parts fiche:

https://www.partzilla.com/catalog/honda/atv/2006/trx350fm-a-fourtrax-rancher-4x4/camshaft

It might smoke like a train if you don't.

 

[Moose39]

So retro think that could be my issue I have changed oil many times and rings I have done everything but open bottom end and change valve seals

 

[retro]

Junk valve seals could be part of your problem, or could be all of it. The connecting rod might be bent too, and it probably is. Don't replace suspect parts one at a time on a known submerged motor though. There are no shortcuts in those cases... you aren't likely to get away with this approach as you've already learned.

If I were you I'd stop right here (before you trash those new parts), split the cases and send the crank out to Vince at Mr. Crankshaft to have it checked/rebuilt.

Ignore at your own peril... good luck and have fun with it.