Hello, I have noticed that all the trimmers I have bought (Echo, Kaw., Stihl, Shin) since the New Enviro-Nut Regulations & the fiXed Carbs have Serious problems when the weather is Hot. They are Hard to Start & Surge Often...Only When it's Hot....I Actually Dumped a bunch of Stihl85's they were so bad & then started having the same problem w/the Kaw & then the Shin & Now the Echo's!!! Dealer Says Mabe they run too Rich When its Hot out Now?!? But He Never can Find anything wrong & has Checked Everything...Replaced Coils etc...& they Allways Work for him...It's Just In the Field when ithe Weather Gets Hot! Anyone else have this Problem Or am I Trimmer Cursed!