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DA 100 Break in ???

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Old 07-12-2004, 04:55 AM
  #1
Mike Bell
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Default DA 100 Break in ???

I am breaking in a DA 100 as recommended but am getting a lot more of a mess out of one side. It is noticeable all over the bottom of the wing, gear and fuse. Stuck my finger in the exhaust and it is noticeable there to.
Is this normal?

Mike
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Old 07-12-2004, 07:03 AM
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Default RE: DA 100 Break in ???

Yes [:@], it's normal. I get it too.

Regards,
Bart
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Old 07-12-2004, 12:22 PM
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Default RE: DA 100 Break in ???

Yep it's normal. Once you switch to a synthetic oil such as Amsoil 100:1 there won't be as much residue.
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Old 07-12-2004, 04:49 PM
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Default RE: DA 100 Break in ???

Quote:
ORIGINAL: Mike Bell

I am breaking in a DA 100 as recommended but am getting a lot more of a mess out of one side. Is this normal?

Mike
Is this normal? A lot more from side over the other?
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Old 07-12-2004, 04:51 PM
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Default RE: DA 100 Break in ???

The prop slipstream will cause most of the residue to end up on the lower left side of the fuselage, wings, etc.
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Old 07-12-2004, 04:59 PM
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Default RE: DA 100 Break in ???

Ryan-

Quote:
ORIGINAL: Mike Bell

Stuck my finger in the exhaust and it is noticeable there to.


Mike
I know one cylinder can run a little leaner or richer. But to what extent to make a lot of difference the way Mike is discribing.
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Old 07-12-2004, 07:01 PM
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Mike Bell
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Default RE: DA 100 Break in ???

Quote:
ORIGINAL: Flyfalcons

The prop slipstream will cause most of the residue to end up on the lower left side of the fuselage, wings, etc.
That is the side. My wife got blasted on the left side holding and had to bathe in the motor home at a FF last weekend. Later the right side holding was nothing.
Thanks guys!

Mike
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Old 07-12-2004, 07:42 PM
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Default RE: DA 100 Break in ???

I must have read the original post wrong. (more than once) I thought he said more was comming out of 1 cylinder. Guess I should go back to school again.
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Old 07-13-2004, 10:23 AM
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Default RE: DA 100 Break in ???

Check to see it both exhaust outlets have about the same oiliness, if they do it is probably mostly on one side of the plane because of prop wash etc.

If the residue is black it may mean you have a loose exhaust system on one side, aluminum rubbing against aluminum will make a real mess that is hard to remove.

If the exhaust system is tight and it is real black inside only one exhaust outlet look at the piston with the header removed and be sure the piston does not look damaged/scuffed.

Assuming that the residue is only oily but one outlet is noticebly wetter it could be that one cylinder is running richer than the other specially at less than full throttle, if you do lots of part throttle flying, this will probably go away after break-in for the most part and after you switch to synthetic.

Assuming that the engine sounds good and is not running on one cylinder sometimes due to something wrong in the ignition system hopefully you will be able to determine what is happening.

flierbk
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