i have a couple questions regarding my os120 fs (non-pumped) engine
i bought the plane used for a steal of a price - just want to get more familiar with it

1) i have a fuel line that wraps along the top of the firewall, in the middle of the line is a fitting with a screw in cap. what is this for? i can a pic if needed

2) the carb as a flap with a stiff wire leading down to beneath the cowl, nothing is hooked to the stiff wire so in order to move the flap, i would need to manually twist the wire. what is this set-up for? do i need to do anything with it? should the flap on the carb be in any speceific position idling though wide open throttle? again i can get a pic if needed.

thanks for the help

Flap?...do you mean the carb is wired full open as in a control line engine,,?..or it has like some choke flap on top of the carb...pic might clear things up...Rog

It sounds like a fuel fill line and a choke but pictures would probably help nail it down a little more.

The flap is a choke. The older OS four strokes had a choke on them, but they don't on the newer models.

As for the fitting. It sounds like a fuel filter. A picture would help to identify what it is.

Ken

ok fellas, i will get some pics. ill be back in a few

valve at top of firewall
choke
choke and wire

The "flap" on the carb is definitely a choke.

Although I'm not sure what the other item is. Hopefully Minnflyer or someone else will be able to recognize what it is.

Ken

Most of the pictures are illegible but yes you do have a choke which were dropped quite some time back as they are really not neccessary.

From your description the other line with a cap sounds like a tee for some sort of fueling senario. I would recomend just using a two line system like any trainer.

Does this engine have the pushrods behind the cylinder or in front of the cylinder?

John

I agree, that looks like some sort of fueler, but I have no idea how it would be used. Never seen one like that

Ok guys, thanks for the response! I now know what that green cap is for. It is to regulate kerosene flow for the smoke system.

Ah ha! You said it was a fuel line. I was wondering why you had neoprene fuel line on a glow engine

I only assumed it was a fuel line of some sort. Didn't really know (obviously lol) until I was able to speak to the original owner.