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Engine basics => Engine set up tips => Topic started by: david smith on May 24, 2009, 02:58:36 PM

Title: fox 35 boom
Post by: david smith on May 24, 2009, 02:58:36 PM

What would cause a fox 35 to break a con rod just below the wrist pin? I was using a 9-6 MA and sig 10/20 fuel.  It was running great and just started to lean out because the tank was low.  The needle was still where it was set at the beginning of the flight.  I would like to find out if it was something I did so I dont do it again. Thanks.
David

Title: Re: fox 35 boom
Post by: FLOYD CARTER on May 24, 2009, 03:55:56 PM

I once had a Fox 35 which broke a rod because the bottom rod bearing got real sloppy and was clanking around.  I don't remember just where it broke.  I would recommend sending it back to Fox.  Their repair service is great, and maybe they will determine it is a manufacturing defect, and repair it for little or no cost.

Floyd

Title: Re: fox 35 boom
Post by: Bill Barber on May 24, 2009, 06:07:25 PM

                   David , the recommended fuel for Foxes was at least 25% oil , maybe that
      was your problem .
                                         Bill