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Hello,

I wonder if when doing an oil and filter change, draining the oil left on the motor belly unscrewing the underneath bolt would need to purge the system.

I would like to do that because in my plane is imposible to drain the oil tank from bottom removing the bolt, no access. I need every oil change to use a suction pump, and would like to get rid of the old oil as much as possible without opening the suction part of the system and need to purge.

Is that ok?

Thank you

 

 

  • Re: Oil change with draining underneath bolt

    by » 3 months ago


    Every time I do an oil change, I disconnect that hose from the oil tank and let it dangle down from the lower crankcase connection in order to drain all the old oil out of the crankcase. This is not the suction side so no oil purge is necessary as long as you don't let the suction side hose drop down below the tank level (tie it up if you need to disconnect it at the tank). 


    Thank you said by: alfonso borja morant

  • Re: Oil change with draining underneath bolt

    by » 3 months ago


    This isn't necessary to do. This is why you're supposed to rotate the prop until it gurgles before draining the oil from the tank. Matter of fact I haven't heard of anyone doing this until now. The amount of oil in there is normally not an issue. Doing things that aren't subscribed in the manuals is what gets people in trouble and cost money for unintended consequences. 


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

    Thank you said by: alfonso borja morant

  • Re: Oil change with draining underneath bolt

    by » one month ago


    You're right Roger; I only let that lower hose dangle when I have opened the oil tank to clean it occassionally. 


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