Today's Message Index:
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1. 05:57 PM - Re: 912 ULS Fuel Pressure (Roger Lee)
2. 09:07 PM - Re: 912 ULS Fuel Pressure (John Hauck)
Message 1
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| Subject: | Re: 912 ULS Fuel Pressure |
You can put a 10 psi gauge inline with the fuel at the balance tube assembly or
if you don't have one then just plumb it inline. If your electric pump is plumbed
in series it has a check valve that could cause an issue until it gets turned
on.
I doubt it's the mechanical pump, but you won't know for sure until you put a gauge
inline. Possibly the fuel pressure gauge, again an unknow until you put a
gauge inline.
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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=444772#444772
Message 2
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| Subject: | 912 ULS Fuel Pressure |
"T" a mechanical pressure gauge into your fuel line.
john h
Fort Lewis, WA
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Stan
Tew
Sent: Monday, July 13, 2015 3:47 PM
Subject: RotaxEngines-List: 912 ULS Fuel Pressure
My 912 ULS mounted in my Rans S7-S has 438 hr. I replaced the old style
mechanical pump as recommended by Rotax. I have an electric fuel pump
and fuel pressure gauge. I usually take off with the electric pump
running in addition to the mechanical pump. When I level off to cruise I
turn off the electric pump. My pressure usually is about 4.5 psi. Last
week I was flying and noticed the EIS warning light and it identified my
fuel pressure to be about 0.9 psi. I quickly turned on the electric
pump. The pressure went to about 3.5 psi. I flew back and landed without
incident. The engine never faltered.
Any suggestion on how to test the mechanical pump? Any suggestion on
what the problem might be? I have not had opportunity to remove the cowl
to make any visual checks.
Stan Tew
N29TD
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