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Old 03-17-2009 | 07:12 PM
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From: Newnan, Ga. GA
Default OS Pattern engine question

It's been many years since I flew with OS 2 stroke engines in old time pattern. Can someone tell me which engine in the 60-61 size is the correct one. I get confused with F FSR etc. I want the schneurle ported powerful one, not the lower powered one. Thanks. ( I want to put it in a Killer Kaos.)