I am new to Gas and would like to hear from the users which gas engine they prefer and why?
Fuji, Zenoah, or US engines. I am planning on installing the engine in a 96 inch Monocoupe.

Depends on what you want out of the engine and how much have you to spend.
of the three you list, ZENOAH.
But there are others to choose from.

If you talking the Kangke Monocoupe, take a look at the RC Showcase 1.40 and 1.80 engines. Even though the review in a recent mag used the Fuji 32, Kangke did their test and recommends the RCS 1.40. The Zenoah G26 would be another good choice.

If you use the Fugi your gonna have to hack up the firewall.
the US is a heavy piece of junk.
The Zenoah G-23 or G-26 would work well.
The RCS 140 is a good choice.
Stay away from the MVVS 160. Mine is on its third ign. and even when it does run its not as powerful as the RCS 140.

njrcflyer
I saw theMonocoupe fly at the Sussex airshow in Aug. It had a RCS 1.40 and flew
very scale and could fly very slow. The RCS 1.40 is very light with good power. I know I have three of them. PJAMESRC