I've come across another issue with the '01 that has been sitting in the weather. When running, we are getting oil blowby into the air box (filter). This is coming from the hose that connects to a fitting on the right side frame spar. Thought it was overfilled, but drained both spars and the crankcase, and refilled with one quart, per the manual, and the problem persists. If it was a car, I'd look for a PCV problem, but I don't know where to start here. Any help with this would be greatly appreciated.

Thanks,
Todd

 

Check for oil flow by looking down the oil fill hole while the engine is running. If there is not a nice river of oil the scavange pump is not working or the hoses are routed incorrectly. Do you have the breather update done?

 

Not aware of a breather update. Searched this forum for breather, and couldn't find much, but will search some more. What does this entail, and are parts available?

 

I've been doing some research, and now have a better understanding of the system. When I drained the oil, there was much more oil in the crankcase than in either frame spar, which indicates a problem, based on what I've read.

The scavange pump is working correctly if there is oil flowing into the frame spar from a hole right below the dipstick / fill, right, or is there something else to check here?

Upon initial startup after the oil change, it ran with no blowby, but after sitting for a day, it started blowing into the airbox again. I was wondering if this might indicate a check ball problem, because the oil would flow past the ***** and into the crankcase while sitting?

If I need to dig into one or both of these possible issues, can they be fixed whith the engine still installed, and are any necessary parts and gaskets readily available?

Thanks for the good information, it is really appreciated.
Todd

 

You may have to clean out the right bottom frame spar. Right above the chain there are two fittings. Take off both hoses and blow air though them.

Smitty