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os 91 fx

Old 11-05-2011, 01:32 PM
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bjackson1206
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Default os 91 fx

Well i was planning on buying prox 260 with dle 20 this week went to a swap meet and found a brand new 91fx bought it dont know if it is a mistake i plane on putting it on the pro x do you guys think it will have enough power to pull plane around i hope i didnt make a mistake
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Old 11-05-2011, 02:29 PM
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Default RE: os 91 fx

the os 91 fx is a great engine. some people (like me ) have had a hard time learning how to tune it. i found the answer to tuning it as explained over in the Q&A of the airplane section. find it and read it. the short of it is these engines come with the low end needle extreemly rich. learn to lean the low end all the way and it should run great for you. i am currently running two of these with great success. the thread's title is"os 91 fx starts and runs poorly help" me... i would try a 15x6 prop to start with in that plane. i hope this helps, capt
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Old 11-06-2011, 11:06 AM
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Default RE: os 91 fx

thanks for the info after I brought this home i was reading several posting on several sites i though i made a mistake I does have the plastic needle valve with seperate mount on backplate
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