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For those of you with engines that use Bing carbies (subaru ea-81, Rotax etc) it would be a good idea to fit retaining springs to ensure the carbies stay attached. I had the unfortunate experience of one of the carbys on my ea-81 come off during a straight in approach. Without emough height to glide to the strip I landed in a paddock with 3 ft high tussocks of grass. The rapid halt caused damamge to my aircraft as the nose wheel was pushed back against the firewall.
You'll find info on fitting retaining springs to the bing carbies here:
It's not too difficult to do and could save you repeating my experience.
PS I also read a notice that the Bing carby diaphram should be replaced after 250 hors.