Hi from France ..... I read a very good article in 'Control Line World ' written by Bob Dixon regarding the use of R/C 4-Strokes for C/L.
He was advocationg you can get a satisfactory stunt run without the need to exchange the R/C carb' for a conventional Venturi set-up.
I bought an un-run Magnum 30 off the infamous E-Bay and set to work running it in carefully , as I'd never tried a 4-stroke before.
A Graupner 9x5 , 20% lube [ 17% synthetic / 3% added castor ] was used for bench running-in. She was happy to run at around 2 turns open on the needle at around 8,000 rpm.
After around 75 minutes of shortish runs she felt just right. I'm a luddite when it comes to running-in new engines !
Oh .....Unlike the previous contributor I never needed an electric starter. 4-strokes need to be well primed as you probably know , this you can do by just blocking the silencer outlet if you can't get to the carb'.
I built an airframe to install the Magnum [ sidewinder /profile] , and fitted a uniflow tank without exhaust pressure , around 2 ounces.
The R/C carb' was 'wired' fully open.
I reckoned a Master 10x6 would be a good prop to start with , and off we go to the field.
Getting to know an new engine by carefull running in always pays off !
A good prime and after a couple of flicks off she went with 2 and a quarter turns open [using the same fuel as the running-in fuel] and the tach showing I think around 8,600 / 8,700.
The tank lasted about 9/10 minutes and the engine didn't falter. Oh .... and what a noise , or lack of it !
In summary , the Magnum 30 [ or the ASP or Super Custom Brands ] is a little gem . Easy to get to know well , easy to start , well made and great value.
Wouldn't hesitate in recommending one !
Or , maybe Ive been just lucky !
Kind regards from the Charente in France from an ex-pat Brit !
Robin