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With only 8.9 engine hours I had an AirBox failure a screw came out off the carb heat flapper that attaches it to the actuating bar. When this happened the screw went though my cylinders and caused 5 out of 8 sparks plugs to be pinged over with the engine running rough and not making much power it would barely maintain altitude back home to the strip which was only about 6-8 minutes out luckily. Any one running a carb heat box like this should make provisions so this doesn’t happen to you.
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Sorry to see this - glad you got back ok !Nev Bailey
Christchurch, NZ
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Glad you got back on the ground safely. Older carburetors used brass screws in the throttle plate. They were hollow tipped and peened over to prevent loss, but if they somehow did get loose, the brass was, I guess, easier to digest.
wonder how one screw could damage multiple cylinders’ spark plugs though. Did it shed other parts in the process?Comment
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I was wondering the same thing. But the photos posted on the BH Facebook page make it look like the inside of the cylinders has been shot peened. -
It was something I learned also I didn’t think it was hardly possible but it bounced around in there and there was clear thred impressions in multiple cylinders and was in and out of all four cylinders
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Service Alert posted on the Bearhawk company website under the resource tab on this topicComment
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