There is an ammendment to the needle setting from the original manual, you guys better recheck the DA what the new setting is, I forgot i think it was 1 3/4 on low and 2 on high or maybe 1 1/2 on low and 1 3/4 on high.

Also one other member did mention about the warlboro carb diaphram being affected by atmospheric pressure, the needle setting is not set rigth then double check the carb issue here is the post.

http://www.rcuniverse.com/forum/m_39...tm.htm#3924138