by Bill Hertzel » 4 years ago
<<< Aircraft is a Super Petrel LS. >>>
Where are the fuel pumps in relation to the fuel tank?
If they are ABOVE the fuel tank, the fuel will slowly backflow to the tank leaving the Fuel Pumps sucking air for the first few seconds of every start cycle.
The pumps are lubricated and cooled by the fuel.
Listen closely to the pumps at the first activation of the day.
They run fast until the fuel rail pressurizes.
It sound a lot like "EeeOwwwww" with the Eee part lasting about a second.
If the Eee lasts longer than that, you have lost the pump prime and are sucking air . "EeeeeeeeeeeeeeeeeeeeeeeOww"
Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.
by Glenn Martin » 4 years ago
680 hr on Mogas here no problems...
by Russell M Ziegler » 4 years ago
Pumps are level with the feed tank. Your noise descriptioin is correct after changing pump assemblies and waiting for pumps to prime. Thanks.
by Armando Escalante » 4 years ago
I have replaced the fuel pump assembly 4 times, in less than 7 hours, since new. On a VANS RV-12iS
Using MOGAS, lucky the pumps have failed during runup and most of the times only one of the 2 have failed at the same time.
My local Rotax dealer has been unresponsive to my multiple requests for a root cause analysis of the failures, they have only confirmed that the pumps I have returned for exchange did indeed fail. Nothing else from them, very disapointing.
This is getting worrisom as the RV-12iS needs the electric pumps working all the time...
Suggestions?
A
by ROGERIO TOLEDO SILVA » 3 years ago
I have a 50 hour total time 912is in a Super Petrel. After a very strong 100LL smell I found I had a HOLE in one of the gas pumps. After landing I found I had very dangerouslly lost some 3 gallons of fuel that had accumulated in the hull and was partially expelled by the water pump. It looked like a "gasfall" of 100ll coming out of the pump.
Anyone had this problem of a hole in the pump?
Comments appreciated
To receive critical-to-safety information on your ROTAX Engine, please subscribe to |
ROTALK NEWS Episode 5
Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft.
ROTALK NEWS Episode 4
ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) and ROTAX factory in Gunskirchen, Austria.
ROTALK NEWS Episode 3
Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations.
This website uses cookies to manage authentication, navigation, and other functions. By using our website, you agree that we can place these types of cookies on your device.
You have declined cookies. This decision can be reversed.
You have allowed cookies to be placed on your computer. This decision can be reversed.
This website uses cookies to manage authentication, navigation, and other functions. By using our website, you agree that we can place these types of cookies on your device.