OS FS120 Surpass

[Judge]

Just started this engine and I am getting a lot of gas spray from the carb. Is this normal?

 

[Konrad]

Yes

 

[Konrad]

As the Surpass is a high performance engine it will have a rather narrow operating RPM band. As I recall this was around 9k rpm to 11k rpm.

Using too large a prop can result in this reverse flowing inlet.