Don't blame ABC's because you got a bad engine from Tower. There are many threads complaining about Tower engines and there are some that have had no problems too. You don't say all cars are bad just because you bought a bad Yugo. (Yogo owners please don't take offense, I had to pick a name somewhere). Most ABC's are fine engines. I have several by OS. One might expect to get a better engine if you pay a little more money. Yugo vs. Cadillac... I also have an OS 50 SX and it is a fine engine, you will be happy with it. You may have noticed the higher price tag when you bought it. I'm sure Tower thinks they are selling a good engine, not owning one myself I can not speak of their quality personally. I wish you good flying in the future and watch your investments.[]

You may have run it too lean too.

Bruce[;

No offense, but all of the problems related to your bad experience had absolutely nothing to do with the engine being ABC.

hmm.........okay

well.......when i first got tower fun 51, i had this old O.S. .40 engine and it work great, never had any trouble with it. After a while, i decided to step up to more extreme stunts and need more power but ever since i bolted .46 ABC engine on it, it seemed not good engine for any reason and that engine is main cause of the crash. but now i fixed the fun 51 and has .50 O.S. and i didn't mind the little steep price tag and it works far better.

by the way, thanks for your comments. :-) and sorry about giving ABC engines a bad name.

Your os 40 is also an ABC I believe, just smaller obviously. You didn't say which 40 you had. I have a K&B 40 ringed and it is strong and I have 2 K&B 61 with pumps and rings that are strong too but my various ABC's work fine too.

Lord forbid we get an honest answere on the reliability of the ABC engine type.

As someone mentioned, that old O.S. .40 was an ABC. Your new .50 is ringed BUT it's an O.S.
In summary, two O.S. engines that ran great and one Tower engine that didn't. Not a lot of data to go on but I think you see a pattern beginning to form.

so you are saying that all of my engines were and is an ABC type of engines? Hmm........my old .40 OS and they don't make it anymore. I don't have that engine with me right now but later, i can get you some infromation. and is Ringed is also a ABC type?

Ringed engines are not ABC. OS makes the following in the 40-50 size range of 2 strokes:
40 LA BUSHED
46 LA BUSHED
40 FX BALL BEARING
46 AX BALL BEARING
50 SX RINGED BALL BEARING
I prefer ball bearings, other than that the listed motors are fine. I have read stories of the LA's having problems at times, opinions- there are a million of them. Some of these are ABC and some are ABN, just a different plating on the cylinder wall. Either is fine. Need to determine your application and select the engine that best fits it and possible future use. Do not overpower my to large of a degree, speed is not everything. It is a lot, but not everything.
Bruce[

yup... and i would imagine that you would be very happy that this ended the way it did.... imagine if it had flown off and impled your neighbors....... manslaughter?

personaly... id rather break the nut (not that thats possible with a 6" wrench or anything) then have a propeller flying through the air at 10k+ rpm's

and i have to agree.... the S&H on a screw and washer just isnt justifyable.... u gotta buy a rx and a tx, couple bateries... maybe 5 gallons of flues... a new plane to start building while you look for that lost nut and washer and while your at it... just forget the washer and nut... buy another engine too ... and that free S&H + 30$ discount is awesome..... and your right... there is not helping us.... so visa better get over it fast!

Balsa Master- May I suggest you calm down on "ifixairplanes" a bit and recognize a little jesting when you read it. I don't believe anybody here wishes any harm to aircraft or bodies of anyone.

My thoughts. Have a good day.

Bruce

That's not what I said at all. The old O.S .40 you had that ran great was an ABC. Your O.S. ringed .50 is not. The common denominator here is the fact that both of the O.S. engines you had ran great. The Tower engine didn't. Get my point?

Balsa Master: I was thinking ahead that day. I am lucky in that I have many "out of the way" fields over 20 miles away from the NEAREST club. club #2 is 40 miles or farther. its to much trouble to drive that far away for a club. maybe once to get acquainted or to get people to look over the plane an show maybe some things not stated in the manual that I should do. like what is entailed in a ple-flight check on rc aircraft. stuff like that.

yeah i get your point, thanks.