Tbobflow

After freshening up my old 61fsr and running a couple tanks thru it I measured the RPM and got 11,350ish out of it. I don't recall what it used to run and I don't think I have had a 11x7.5 prop before. Does that sound about right?

thanks!

Tbobflow

Oh, this is a ringed one. I don't know if they were all ringed, seems like maybe some were ABC.

jamesroutledge

Haven't tried mine, but these may help:


http://www.rcuniverse.com/forum/tach...os-60-fsr.html


http://www.rcuniverse.com/forum/tach...1-fsr-abc.html

earlwb

That sounds about right using the OEM muffler. So you are in the ballpark for what the engines can output.

Tbobflow

Thanks for the links, those were helpful. Yes, it has the stock muffler on it. I really dig the FSR.

cclhuzhou

I don't know if they were all ringed, seems like maybe some were ABC.

JollyPopper

My Feedback: (6)

Yes, some of the 61s were ABC, some ringed. The .60 FSR had a smaller crankshaft diameter and were ABC only. These are some of the finest engines OS ever produced.

landeck

My Feedback: (1)

JollyP, the .60 FSR where ringed only and were released about 3-4 years before the .61 FSR series. I have one.

Bruce

308jockey

You could get this engine ringed or ABC, I have both. Unfortunately all of them are about worn out. I was able to get an ABC piston/sleeve from Shadel some time back and get superb performance from it. I wish I could find a couple more of them, best $90 I ever spent repairing an engine. As much as I like the FX series there's just something about the FSR's that appeal to me.

Rick H.

Bax

My Feedback: (11)

If you cannot find the piston and ring for a .61 FSR, the piston and ring from the .61 SF-N engine is the same part. That was the "short stroke" heli engine.

blw

My Feedback: (3)

Thanks, Bill.

Tbobflow

I ran this engine some more today, got 12,450 on the MA 11x7.5. Flew a tank out of it too, I wish my airplane was lighter....

Im using 20% fuel.

Tbobflow

I bought another used 61FSR detail out and refurbish as a project. It's in pretty good shape but I need to find a puller for the prop hub so I can replace the front bearing. I've seen a OS one that looks pretty simple to use.

GREG DOE

Tbob. I've been using a cheap battery terminal puller. The type to pull leads off a "post" type automobile battery. I got mine from an auto parts store over 30 years ago. I had to do a little modification to it, but it wasn't anything that had to be precise. Good luck, Greg

Tbobflow

Thanks Greg that sounds like an easy thing to try.