AM, I have an OS160FX I bought 6 months ago and put it in a GP US1000, the engine runs great and starts up easy, I have about 1/2 gallon through the engine. My question is when I rotate the prop by hand it makes a scratchy sound as if there is something inside the piston area, but again it runs great. I have 2 other OS160's and neither make this sound, this one has been sounding like this since day one. I purchased the engine at my LHS brand new.What should I do? Thanks, Daz...


BTW, when it is flying although it runs good it does have a different sound than my other 160's.

Any word yet. I can send it in if needed, no problem, I have many other planes to fly . It was actually purchased Jan.2002, Thanks, Daz...

Hi Dazz! For some reason i didint see this thread, sorry.

Sounds like some lose "gunk" in there. Please send it in before she does any damage to herself.

www.hobbyservices.com for worksheet to send it in.

Thanks AM, I will send it tomorrow. This is the 1st time I had to use your service dept, thats cool how you can download the worksheet. Take care, Daz...

AM, I managed to get the engine out last night, and sent it UPS this morning back to Hobby services, with reciept and worksheet. Thanks, Errol Washington (A.K.A Daz...)