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05-16-2011 | 12:09 PM

#21

opjose

Joined: Nov 2005

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From: Poolesville, MD

RE: Keeping engine clean

Quote:

ORIGINAL: harryangus

OPJOSE,



You raise an important fact. I have 3 OS engines and I use the same fuel and flew all 3 the same amount of time.

However only one (the LA) has a lot of stains and that stain is mostly on the top of the cylinder.

And that engine beeing an LA has a metallic rattling sound since the first time I started it.

The hobby shop told me it was OK, and that all LA engines have this noise.

I am not a handy person and I know very little about engines, I would not try to uncrew the head myself.

I will ask a friend for help.

Thanks,

You do not have to remove the cylinder head, nor would I advise you to do so.

You should however tighten the screws down with the engine warm, or for added safety do as I mentioned and take the opportunity to add lock-tite on one screw at a time.

As far as the metalic noise... If you've lost the small thin thrust washer ( something newbies tend to do! ) the crank shaft will move back and forth causing the noise.

This is not good.... check to see if the thrust washer is there under the prop hub. If not get a replacement asap.

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