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hgmckay
Joined: 23 May 2006
Posts: 397
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 Posted: Mon Aug 28, 2006 2:15 pm Post subject: Rotax Fuel Pressure Gauge |
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Gentlemen:
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The Fuel Pressure gauge from Rotax for my 912UL is marked with two red lines, one at 0.2 bar, and the other at 0.5 bar. I assume these are min. and max. indications. The Rotax 912UL Operators Manual page 10-5 states that the min fuel pressure is 0.15 bar, and the max is 0.4 bar. Are these red lines on the gauge essentially the figures given in the manual, 0.15 and 0.4 bar (i.e. as close as they could mark the gauge)?
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Hugh McKay
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Tue Aug 29, 2006 3:21 am Post subject: Rotax Fuel Pressure Gauge |
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Hugh,
Our fuel pressure gauge is marked the same way as you describe yours.
And, yes, the two red marks are supposed to be the limits, but as you
noted, they are not marked according to the Rotax manual. Another
little factory glitch, eh? In practice, our fuel pressure with just the
mechanical engine driven pump running reads about .25 bar. With both it
and the electric boost pump running it reads about .3 bar. This is
part of my pre-take-off checklist to make sure the boost pump is
functioning. I don't know if the boost pump is rated for 100% duty
cycle so I only use the boost pump for take-offs and landings.
Thom in Buffalo
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
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