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Magnum Engines XL 70 RFS Blue R/C 4-Stroke EngineProduct Review (submitted on February 6, 2012):
I have the engine installed in a Kyosho Oxalys 50 pattern plane. More than enough power at half-throttle and I love sound. I noticed that when I take the glow igniter away I too have a drop in RPM and I notice rough idle as well. This started occurring after a half-gallon of fuel had been run through the engine. I will change the plug and see what happens. Other than that this is a great engine.