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Author Topic: Fox 25 BB  (Read 1112 times)

Offline Elwyn Aud

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Fox 25 BB
« on: May 14, 2019, 12:02:19 PM »
I have a Fox 25BB I haven't ran and was curious about fuel and prop recommendations. I bought it some years back from a group of salvaged engines Fox sold off after their facility suffered storm damage and it didn't have any paperwork. I remember digging through a pile of motors and picking out two C/L versions that had unstuck pistons. I think I paid $20 each at a hobby shop in Dallas.
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Offline BillP

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Re: Fox 25 BB
« Reply #1 on: May 14, 2019, 12:33:39 PM »
Fox says 5% nitro and 20% castor oil and recommended 9x5 prop in their paperwork.  I remember Malvin at Fox saying 15% nitro was preferred for the best performance. I have the older 25 bushing version on a Flight Streak and run 5% and 25% castor, 9x6 and factory muff. Its a tad fast with 6" pitch...but is a sweet runner.   
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Bill P.

Offline Dennis Toth

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Re: Fox 25 BB
« Reply #2 on: May 14, 2019, 03:41:29 PM »
Elwyn,
Is it abc four bolt head? If so it will be tight when cold. Look in Randy's fuel post at the top for "ABC" fuel and break-in.

Best,  DennisT
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Offline Air Ministry .

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Re: Fox 25 BB
« Reply #3 on: May 15, 2019, 12:07:45 AM »
Theyre those things you can put the exhaust left, right , or aft . BEFORE RUNNING . Obviously you want it AFT .  :o :)
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Offline Mike Greb

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Re: Fox 25 BB
« Reply #4 on: June 01, 2019, 07:43:33 PM »
Fox 25bb is a steel liner cast iron piston motor
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Offline Elwyn Aud

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Re: Fox 25 BB
« Reply #5 on: August 12, 2019, 03:01:51 PM »
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