OS 61 FX Problem
 

Hi People,
Have an OS 61 FX with less than a gallon of fuel through it before I nosed it into frozen terra firma. It was in a U-Can-Do 46. Well I just put it in a Cap 232 and noticed the spinner backplate wobbling as I hand propped it. Put a neww crank then reinstalled it, took the glow plug out and spun it with a starter. At the end of a 13" prop I get about an 1/8 to a 1/4 in run out.
Any one have any ideas? I don't have a dial indicator. Couuld it be the backplate behind the spinner?
Thanks
Red

RE: OS 61 FX Problem
 

Did you install a new crank in the engine?

I bought a crashed engine one time understanding that the crank was bent. - Turned out that it was a busted prop drive washer.

If a spinner was in a crash and wobbles, then it needs to be replaced

RE: OS 61 FX Problem
 

Has to almost be the prop drive washer, or the prop warped. Ross

RE: OS 61 FX Problem
 

Thanks w8ye
New spinner, new crank. Was your drive washer just bent or cracked?

RE: OS 61 FX Problem
 

Thanks guys,
Just tried two other props with same resulults, this time no spinner backplate. I think the gap between the drive washer and the engine casing changes slightly. Not easy to see with these old eyes.:) Going to order a new one.
Thanks again.
over 25 years and only bent a crank once, along with the engine casing breaking. Into the ice that one, then the garbage.

RE: OS 61 FX Problem
 

My engine with the bent crank experience was a Saito 182 twin that got shot down. The drive washer was on the crank crooked. Not taking any chances, I just installed a new drive washer. The problem went away.

RE: OS 61 FX Problem
 

With the cost of OS parts why try to repair? Just order a Super Tiger probally won't be much higher than parts to fix OS.

RE: OS 61 FX Problem
 

Hey Buzz,
You right, but its too late. Totale of the parts so far has been about a $100 clams
Will have to remember that tip.
Thanks

RE: OS 61 FX Problem
 

Your welcome, I have been where you are before and I know first hand how expensive the OS parts can be. I ran two 61FXs and a 46FX before switching over to Super Tiger.