View Full Version : OS 50 damaged piston
mporlier
11-04-2008, 07:42 PM
Hanyone else had the same problem? I do not know what caused this. Does not look like a lean engine since the parts look OK. I sent the engine to OS today, it has less than a year. The color in the picture is wrong, it does look better than that. I hope they will replace under warranty. I found this WEB site with the exact same issue. http://shoestringbudgetrc.blogspot.com/2008/05/yet-another-pistonring-set.html
http://www.brossair.com/images/fbfiles/images/OS_1.JPG
http://www.brossair.com/images/fbfiles/images/Moteur_OS_006.JPG
TheBum
11-04-2008, 09:12 PM
Yeah, it looks like metal fatigue to me, although I suppose getting the engine too hot could soften the aluminum and cause it to chip off like that. I think there's a good chance OS will cover it under warranty.
Grant_beltcp
11-05-2008, 07:28 AM
Mine did the same, about 2 months old in all aswell.
Did you have any problems with it running quite hot just before however rich it ran?
Mine looked exactly the same. No burnt markings on the cylinder, just broken off at the side.
mporlier
11-05-2008, 01:02 PM
Mine did the same, about 2 months old in all aswell.
Did you have any problems with it running quite hot just before however rich it ran?
Mine looked exactly the same. No burnt markings on the cylinder, just broken off at the side.
Yes it did run hot no matter what I did. This is, according to a friend, because there was ignition in the bottom part as well as the top.
rockjock3
11-05-2008, 01:21 PM
I would say it looks like fatigue as well as some kind of ignition issues. That pitting on the face looks like it is caused by misfiring or something. That part doesn't look like fatigue.
mporlier
11-05-2008, 01:39 PM
The pitting is from metal parts getting squeezed between the cylinder and the cylinder head. My head as the same marks.
Grant_beltcp
11-05-2008, 02:38 PM
Seems identical to mine.
Let me know how you get on with OS with it - mines about 6 months old now and sitting in a box - might try sending it back if you have any luck.
mporlier
11-05-2008, 02:46 PM
I will.
eskiserkan
11-12-2008, 07:06 PM
I had the same problem twice on my Hyper 50. Although I couldn't find the cause of the problem , I believe that the problem is caused by the over-heating of the enigne while I am flying.
JaggedEdge
11-12-2008, 07:34 PM
Detonation can cause:
A broken ring land.
Piston top pitting (abrasion).
Overheating (skuffed piston skirt).
mporlier
11-14-2008, 07:19 AM
Well I got my answer today:
"DEAR VALUED CUSTOMER- WE ARE REPLACING YOUR ITEM(S) AT NO CHARGE AS A CUSTOMER SERVICE, HOWEVER, THERE IS A STANDARD SHIPPING FEE DUE BEFORE PROCESSING. THANK YOU FOR YOUR TIMELY RESPONSE. "
:happyd:clappp
Pinecone
11-15-2008, 11:15 AM
How much is the fee?
The cost of a new engine plus $20? :)
mporlier
11-15-2008, 11:31 AM
How much is the fee?
The cost of a new engine plus $20? :)
Shipping was 24$, I am in Canada. I think with all the parts they are replacing I got a super deal. At Heliproz they total 164$ and I paid 179 for the new engine
OSMG7482 25217000 PIN RETAINER 50SX-H
OSMG7515 25203200 PISTON 50SX-H
OSMG7790 25303400 PISTON RING 46SF/H
OSMG5279 25203100 CYLINDER LINER 50SX-H
OSMG2734 25204200 HYPER HEAD 50SX-H
OSMG3043 26730010 REAR BEARING 50SX-H