ORIGINAL: ro347
I have an OS 46ax which I havent used in almost 2 years. Last I used it, it wa relatively new, about 6 months old. In preparation for one of my winter builds, I was looking through the exhaust port and noticed some grainy particles sitting on the piston head. So I decided to take the engine apart just to cean it all up before I ran it again. Well this is what I found - see pics. I dont have engine rebuild experience so dont really know if its anything to worry about. Seems like very light corrosion on the back plate, crankshaft and rear bearing. How can I correct this? Could I just sand down with very fine sand paper or dremmel, would I need to replace? Any help would be appreciated. Im assuming the rear bearing will need to be replaced.
ro347......i don't know that i can tell you how to clean than motor up, or if you will just have to replace it.....what i can tell you is how to avoid this same thing from happening in the future......in my 25+ years of flying radio control i've alway's ran out all of the fuel at the end of the day.....fortuneatly for me, this is one of the first things i was taught when i joined a club and started flying rc.....unfortuneatly nitro has some degree of moisture in it and it is necessary to drain the fuel tank and run the engine dry at the end of the day to prevent rust inside the motor from sitting over long periods of time......also, one other thing you could do is buy some after-run oil and shoot a couple of drops into your motor "AFTER" you completly run out all of the fuel......the proper procedure for running out all of the fuel would be as follows......find a safe area to start your motor, run the motor wide-open, remove the fuel line that feeds the carberator and let the motor run wide-open until all the fuel runs out and the motor quits......now to lubricate and protect the motor from corrosion, remove the glow plug and shoot a couple of drops of after-run oil into the piston area while you spin the motor over, either by hand or with a electric starter, this will coat and protect the piston area and the upper-end of the motor.....now open the carberator wide-open and drop a few drops of after-run oil into the carberator while you spin the motor over, either with an electric starter or by hand, this will coat and protect the crank and bottom end area of the motor against moisture damage in the future......i hope this helps???....like i said, i can't do anything for this motor but, this little bit of info. might prevent this from happening again in the future......life is a learning experience and radio control is no different.....my dad used to say, there's nothing wrong with making mistakes as long as you learn from them, it's when you make mistakes and don't learn that you keep making the same mistakes over and over, that's bad......ro347, hang in there....it's thanksgiving holiday weekend.....everybody's eating turkey and celebrating with their families.....as soon as this holiday thing wears down i am sure somebody will jump in here and have all the right answers to your particular situation......we had family over too and if my wife would have caught me doing the RCU/internet-thing, she would've cooked my hide.....being that she's never flown, she can't understand why we can't leave it, not even for one day???....ha! ha! ha!......take care, ro347....i'll check back and see how your holding up......i have to wait out today(sunday), it's supposed to rain and then it's supposed to be warm and sunny and dry the next 4 day's......i'm getting all my s**t ready, i haven't flown in @ three week's.....i just got another plane built, balanced and motor tuned like a hawk and i'm dying to try it.....KOOLKRABBER47.......
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PRECISION AEROBATICS BADBOY V2 O.S. 46AX STINGER 12-4 WOOD PROP JR XP6102 COMPUTER RADIO