EVAC dumped oil straight into my carbs on slow rollover!

[Frostbite]

I copied the below post from the mountain side when they started bashing the ECP filters. I have to wonder if I install the stock oil catch basin and come into the EVAC T on the front of the filters from the top if it would have prevented this?

Here's the story.

I was climbing on the way back to the trucks this past Friday with Jonny Rocket. I screwed up and got bucked off and laid my sled on it's side while trying to climb a steep hillside.

With my old MSRX if I was really stuck I'd tip the sled over on its top and roll it into fresh snow.

Well, my RX-1 Mountain was more on the windshield than the side so I thought it would be easier to just roll it all the way over than to try to roll it back up the hill.

BAD IDEA!

After I rolled the sled over I saw oil coming out of my hood vents and said a few colorful words. Then I opened the hood and there was oil everywhere! The ECP filters and prefilters were dripping with oil and the sled was flooded (with oil). I assume it came from the EVAC kit oil line and right into the air filters. The sled wouldn't run with the air filters on so I had to run it back to the truck with no air filters but I made it.

Moral of the story is:

Four strokes don't like to be upside down (I knew this but now I will never question it again).

Learn from my mistake.

Frosty (Mr. Dumass)

PS: Is there a check valve that could be added to the evac line to only flow in one direction? Wait a minute. The crank case pressure is evacuating from the crank case the same direction the oil just flowed into the filters from so scratch that idea. [/b]

Go to the mountain side to see the rest of the story.

 

[SUPERTUNER]

This person stated:

"Moral of the story is:

Four strokes don't like to be upside down (I knew this but now I will never question it again)."

RIGHT!!! LOL! Difficult to ride them that way anyway!

Freddie

 

[Frostbite]

Freddie, I'm thinking that maybe one of the other EVAC routing methods would have made all the difference in the world.

I am (was) using the straight from the crankcase breather to the evac line "T" connection method which dumped oil directly into the carbs.

I see others have mounted a crankcase/valve cover mounted vent line on the steering support post. I can't see if the hose on this one comes out of the oil catch basin or straight off the crank case vent line.

Another method comes out of the "T" between the carbs and goes UP and back into the stock oil collection basin. My only question here is where does the condensation end up?

In your opinion would one of these be better than the other at keeping oil out of the carbs when the sled is tipped over (which is rather common in the mountains)?

Frosty

 

[SUPERTUNER]

Frosty...condensation forms regardless of wether the engine is a 2 stroke or 4 stroke. The 4 stroke engines do create more however. I would say that making the oil have to go up hill would better prevent oil from getting into the carbs.

Freddie

 

[Frostbite]

Thanks Freddie.

Although, I'm not really sure which method you are promoting as they both would require the oil to up hill. Right?

Frosty

 

[Indy]

check valve=PCV valve. I have this in the bottom of my evac instead of a plug, wont suck air and drains the oil. Couldn't you use this somehow?

 

[Frostbite]

Indy, that's a great idea but I'm not sure how it would work.

It would have to be between the crank case vent and the air filters to prevent the oil from going into the carbs.

Frosty