Back to the drawing board

The followIng day I went back to the hangar to run the engine a while and get my confidence up that everything was good. Also, there was some thought there was some bad gas in the system and running it might clear it out.

I started it up, fired first time and let it warm up at 2000 rpm for two minutes. Next I increased to 2500 to get the engine up to temperature and I could see some minor vibrations and before I could get too disappointed I could see fuel splashing over the firewall.

I shut the engine down and took a look, the float valve overflow on the pilot side was full of fuel. Back to square one (well not quite, the other carburetor wasn’t overflowing).

So I doused everything in petrol, lit a match and flicked it over my shoulder as I walked away. Yippe Ki Yay…..

2 comments for “Back to the drawing board

  1. David Uhlig
    April 19, 2018 at 10:14

    Just a shot in the dark, but gas coming out the float bowl overflow sounds something like this maybe.
    Rotax 912 float warning. Check yours. It can happen to you. It has ……/rotax-912-float-warning-check-yours-it-can-happen-to-you-it-...
    Apr 28, 2017 – Recently, I have had numerous problems with the Rotax Carb Floats. Luckily I was able to avoid an engine failure, just loss of power but enough to land safely. This has been for new and old floats. They absorb fuel and can sink. Some say that the newer floats are OK, Wrong. Some say that the older floats …

  2. admin
    April 19, 2018 at 10:19

    Hi David,

    My next blog post is exactly that – I weighed the floats on the leaking carb and they were 11.5g so I have a new pair in the mail right now. Seems wrong that Rotax can’t make floats that work.

    Thanks for the comment!


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