Hello Bill,
I have the version of the 120 Surpass with the Breather nipple. I believe it to be the E model.
I was wondering what your recommended Nitro content and prop size were.
I wrote you not too long ago about the Super Tigre G2300 on 30% Nitro. I was wondering if this engine would respond the same way.

Also, if the metal (intake) tube running from the carb to the cylinder is bent, what do i need to order as a replacement?

This might be a newbie question, but what is the procedure for using the choke on this motor. I have never had a glow motor with a choke (that wasn't my finger!)

Thanks in advance,
Jim Prieto

We normally use an APC 15 x 8 propeller on the test stand. This gets the engine running in the 9,000's, which is where it should go.

If your intake pipe is bent or dented, you can order a new one from any O.S. retailer. Here is the stock number and list price:

OSMG6483 45569420 INT MANF ASSY FS120E US$29.99

Awesome man, thanks for the quick response. I ordered the part and the gasket set just now.

Is there a suggested nitro content for this one? I just bought the 5% for the ST 2300. Should I use that for this one as well, or is 10 or 15% better?

Thanks again,
Jim Prieto