Cinnabunn1,

I solved the vent line plugging problem I was having by removing the muffler baffle plate. Horizon had said the engine ran fine after we sent it in, but the line plugged itself within 10 seconds of running full throttle (on a 20 degrees day). Removing the muffle baffle solved the problem.

http://www.rcuniverse.com/forum/m_68...tm.htm#6992949


I hope this might be helpful.

--Doug