Gymnast,


Whichever engine you select, do the break-in of your next one, using the method described [link=http://www.rcuniverse.com/forum/Tapered%2DBore_Engine_Break%2Din_%2D_Upgraded/m_1850473/tm.htm]here[/link].


In a couple of threads, modelers that run car engines, wrote their engines last about three times as long, before needing a rebuild, when using this method, rather than the "extra rich" break-in the hobby shops "recommend"...