jdmmax,
i'm not sure what to tell you, but I have heard that the Mach is really nice WHEN it runs. [link=http://www.rcuniverse.com/forum/m_3095734/tm.htm]This post[/link] is another that speaks of our problem and some have sent back 2 or more engines[X(] I do not want to mess with swapping engines every time it breaks, so I just want to get a RELIABLE engine.

On a side note, have you uses the roto start for your NovaRossi engines? Would this design work in the LST? This is probably the only thing holding me up from buying. Also, is there a replacement that I could buy that would fit that engine? Could I buy the pull start version then use my LST roto start?