Oil Delivery System - Return question

[YUOnDaGround]

The return line from the crank case to the oil tank, how much oil does this actually move from the crank case back to the oil tank? Is there a pump inside of the engine that moves it along? How does this work? Thanks for your time.

Bruce

 

[seadooya]

it doesnt / ciculate. Its there for pressure relief, if anything.

 

[YUOnDaGround]

it doesnt / ciculate. Its there for pressure relief, if anything.

Looking at the parts break down I saw the arrows denoting the flow dirrection, just wondered if there was any preasure behind it.

 

[YUOnDaGround]

Here is another question: I am adding oil to a dry system, meaning that I just put in an engine and the crankcase is slightly down and all oil lines are dry. How would one recommend purging the oil lines and crankcase of all air. The only thing I know about is the bleed screw on the oil pump. Thanks again.

 

[rotaxrule1]

Just hook up the lines, fill the oil tank. Then bleed the oil pump via that screw you are talking about until you get all the air bubbles out of the line going into the pump. Then you should be good. I would run premix in the first tank just to make sure your oil injection system is all primed up.

 

[seadooya]

when you fill the bottle/resivoir up, it'll flow thru rv cavity and up the return line.

The oil injection, theres a screw/bolt, that you loosen, to "bleed" up to the injection pump, or pull line at pump, let it fill to it, then quikly, install on pump fitting. This is where break in oil comes to play. With ski idling, you'll need to hold th injection pump WOT, and this will "purge" the oil lines. Once excessive smoke starts happening / engine bogging, then you know, the lines are filled/purged.

 

[YUOnDaGround]

Thanks for the info, I'll give it a try this afternoon.

 

[Opformark]

Not to hijack your thread but I'm in the same spot as you. I cranked the motor holding the pump wide open and the oil barely moved from pump through the lines about 2 inches toward the RV nozzles. Does it just need the increase rpm to get started? I know the pumps rarely go bad but shouldn't they pump more?

 

[seadooya]

Not to hijack your thread but I'm in the same spot as you. I cranked the motor holding the pump wide open and the oil barely moved from pump through the lines about 2 inches toward the RV nozzles. Does it just need the increase rpm to get started? I know the pumps rarely go bad but shouldn't they pump more?

No, thats about the "speed" at idle, with holding pump, wide open. Thats why its not a bad idea, to have premixed gas, in first tank for break-in.

 

[YUOnDaGround]

what ratio would you premixed the first tank? Rather a better question would be, how much oil would you add to a full tank of gas to achieve the proper ratio?

 

[ocod]

what ratio would you premixed the first tank? Rather a better question would be, how much oil would you add to a full tank of gas to achieve the proper ratio?

40:1
16 oz to every 5 gal.

 

[YUOnDaGround]

I wonder how the engines would run once the oil pumps primed up and started injecting the proper amount of oil. It would effectively drop the ratio to 20:1.