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Magnum Engines XL 91 RFS Blue R/C 4-Stroke EngineProduct Review (submitted on August 30, 2010):
I have been using the .91 4 stroke magnum for over a year now, it has over 10 gallons of sig 10% fuel through it now and i have adjusted the valves once. It runs excellent, always starts even in 0 degree winter months. I have had absolutely no problems and i am extremly happy with it. I have ordered another .91 and another .70 4 stroke magnum. I plan on replacing all my engines with the Magnum 4 strokes over time. I have the .91 on a telemaster sr. and it is almost unlimited in power, I can even do outside loops with it. I lift off the ground in 10 foot or less. Happy, Happy, Happy