Milky chain case oil??

[Traildale]

Just changed the chain case oil in two phazers. The drained oil from the first one was black as expected. On the second one, the chaincase oil was like chocolate milk, which I assume means that there was some water mixed in with the oil. The total volume wasn't much different, so probably not too much water in the oil.
So, how did water get into the chaincase????
The sled is a 2007 Phazer FX with 550 miles that I just bought used so I don't know the riding history. Other than that, the sled appears clean and straight.
Anybody seen this before?
Is it serious?

Thanks!

 

[lokn4sno]

Hate to say this... Maybe it went for a swim...

 

[lakercr]

Hate to say this... Maybe it went for a swim...

Not necessarily. We have the chaincases off our snow-x sleds more in one season than most people will in a lifetime. If the sled goes from warm (indoor heated shop) to outdoors frequently, I would expect to find the oil looking like this. Wash and inspect all parts well, re-assemble and put in a good synthetic chaincase oil.

To answer your question - condensation.

 

[ecopter]

I usually change my oil once a season (approx. 2500 miles), and it always has the same "gold" appearance as when it went in. I'd say it may have gotten moisture in it.

Jon

 

[Sled Dog]

Yes moisture has got in there somehow be careful even when you wash your sled with a pressure washer.

 

[SharkAttak]

some water probably got in there, i change mine chain oil at least once a season

 

[DaveRX1]

My chain case oil looked milky and kind of grey. I have never had another sled with case oil that looked like this. I had not riden the sled for weeks when I drained it, so if it was water I would think that it would have seperated out from the oil, but it was still totally emulsified. My FX has 1700 miles and has never been "dunked" I have ridden across a couple of very slush covered lakes. How had is it to pull the chain case and check the seals on this thing???

 

[franklin]

My oil was milky also. After some investagation I found the lower bearing seal and bearing itself were both bad. I called yamaha on the bearing and they had no other problems reported but replaced the bearing and seal for no cost to me.

 

[DaveRX1]

ttt

 

[Isthatahemi]

My oil was milky also. After some investagation I found the lower bearing seal and bearing itself were both bad. I called yamaha on the bearing and they had no other problems reported but replaced the bearing and seal for no cost to me.

They've never heard of that before.......
The that line at the annual Yamaha factory training. I heard it half a dozen times last year. I have a leaky seal on mine too BTW....