Pressure Gauge

[mlewis]

All,

Running the fuel line/regulator to my Gen 2 Coyote using the standard FFR set-up. Per the instructions, it looks something like this:

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I noticed it will be impossible to see the gauge where it is positioned between the firewall and the back of the engine, so I was thinking of adding 45 deg. fitting adapter like this :

128530

Any issue doing this ?

thanks.

[MVRight]

Others will likely chime in, but general rule is not to have the gauge on after you have the pressure set. One or two fires believed to be because he gauge leaked. Adding a 45 degree fitting would likely only add another fail point.

[edwardb]

The reports of gauges potentially breaking and causing fires I think are for gauges mounted on the fuel inlets of carb installations. Where they're subject to engine vibration, etc. For a firewall mounted regulator, don't think that's as much a concern. But still no reason to leave it there after using it to set the pressure and monitoring it for a bit at first. I wouldn't use that brass piece. Use a mirror or whatever to see it for the few times needed. Then remove and put a plug in the port.

[Jim1855]

I had a gauge mounted to a regulator which was mounted on the firewall. Never an issue, lots of miles. Don't think I'd mount it on the engine. Kinda like mounting things to the paint mixer at the hardware store.

Jim

[Mark Reynolds]

Totally fine to keep the gauge mounted and also to use the 45 degree elbow. With pipe threads though it may not be facing the direction you want when the threads are as snug as you would like - you just have to try it.

[tbl100]

The fuel gauge thread is NPT. Should Teflon tape or thread sealant be used? What's the best for fuel applications?

[RBachman]

The fuel gauge thread is NPT. Should Teflon tape or thread sealant be used? What's the best for fuel applications?

I used PTFE tape (the yellow stuff) It maintains a tight seal despite exposure to extreme pressure, temperature, and chemicals. Its effect as a thread sealant is the same as that of Teflon tape.