06 Fusion 600 fills one cylinder with oil while sitting in the trailer

[jimcalny]

I have a 06 Fusion 600 that will completely drain the oil tank into the engine while sitting in the trailer over the summer. I've seen a couple of threads on here similar but nothing that answers the questions I have. Best I can tell it only drains into the cylinder on the mag side. The cylinder will fill up with oil to the point that I will have to pull the plug to get it to turn over pumping a ton of oil out of the plug hole in the process. So questions I have are;

Is there a check valve somewhere that will allow oil to flow into one carb and not the other?

I've seen threads about the vent in the cap not venting while sitting. I've tried holding the cap at the same angle as it sits on the tank and I can’t suck or blow thru it. Does anyone know if there's a problem with this cap venting or allowing the tank to pressurize during temperature cycles?

Is there something that I'm just flat out missing? wouldn't be the first time for that.

I apologize if some of this is redundant but I'm a bit stumped by this. Seems like a lot of trouble for a sled that has about a 1000 miles on it.

 

[BB454]

oil

The brass fitting that the oil line plugs onto is the check valve, they are pressed into the block. Probably stuck open.Part number 7051020. $20.00 from Polaris. You might try buying a disposable syringe at the Pharmacy and putting a short piece of oil line on it. Then take the line off the motor and use the syringe to force brake cleaner through the fitting to see if you can get it loose. It will evaporate pretty quick but to be safe, push some injector oil in after you get it loosed up. You can even leave the syringe hooked up and pull the plunger out with oil in the syringe. Hang it vertical and see it the check valve keeps the oil in the syringe. If not repeat.You have to have the plunger out so it will drain. If it still doesn't hold then replace the valve.

 

[jimcalny]

oil

That is exactly what I was looking for. I will give this a shot thank you.

 

[jimcalny]

oil

I've decided to just change the check valve. I bought the part on Ebay for $20 free shipping. Any tips on pulling it out?

 

[jimcalny]

oil

Pair of Vise Grips on the check valve and a little wiggle and it came right out. Small dead blow to install the new one.
I couldn't find the crank case drain so i but the hose from my vacuum bleeder in thru the intake port with the piston TDC and sucked out the oil below. took out 2 cups or so of oil.
I hope this fixes it I really dont have a warm fuzzy about it. Waiting on new carb boots then back together and see...

 

[r.c.rob]

Is there a check valve in that elbow?
Wouldent it fill bolth cylinders if it was the elbow?
Sounds like the case halves arent sealed by the inner crank seals on that side.
That is where the cross shaft for the water and oil pump get oil from.
Rob

 

[jimcalny]

oil

This is the cylinder on the mag side. when I sucked the oil out it was all on that side. I didn't get any oil out of the clutch side of the crank case.
Is this what you were saying? all the oil is on the same side the intank port and exhaust port at the jug on the clutch side is all dry.

 

[r.c.rob]

Yes
If it is all on one cylinder i would think it is in the case half parting line or inner crank seal.
Rob