TomVal
Well Known Member
In reference to Van’s RV-12 Operating Checklist for the Rotax engine I have a question about fuel boost pump usage procedures. In the “Pre-Start and Starting Engine” checklist there is no mention of turning the boost pump on prior to start. Although the first item listed in the “Starting Engine” checklist is “Fuel Pressure – Normal” which would imply the fuel boost pump must be turned “ON” prior to start. If so, there is no mention of turning the boost pump off after start. Does that also imply that the boost pump should run continuously??? As a matter of fact, there is no mention of fuel boost pump usage anywhere in the Operating Checklist!
On the Jabiru, the Operating Checklist does direct you to turn the boost pump “ON” for 10 seconds prior to start then “OFF”. After that, there is no further mention of required boost pump usage.
I find the lack of boost pump usage for both powerplants interesting. The single Bing carburetor on the Jabiru sits approximately at the level of the bottom of the fuel tank (lots of head pressure), whereas the dual carbs on the Rotax sits high on the engine.
These Rotax and Jabiru engines appear to be of a different breed. I would appreciate some RV-12 operator input on their boost pump usage procedures.
Thanks,
On the Jabiru, the Operating Checklist does direct you to turn the boost pump “ON” for 10 seconds prior to start then “OFF”. After that, there is no further mention of required boost pump usage.
I find the lack of boost pump usage for both powerplants interesting. The single Bing carburetor on the Jabiru sits approximately at the level of the bottom of the fuel tank (lots of head pressure), whereas the dual carbs on the Rotax sits high on the engine.
These Rotax and Jabiru engines appear to be of a different breed. I would appreciate some RV-12 operator input on their boost pump usage procedures.
Thanks,
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