Fuel Primer?

[markw]

Is anyone using the fuel primer from GPAS?
How does it work?
Did you use the Tygon tubing that comes with it or copper?
I think I prefer the copper!
What nozzles did you use? I do not see nozzles in the kit from GPAS

Thanks for your input!
Mark

[splischke]

I used a GPASC primer for the first 150 hours. It worked okay at first but it then started to leak. I then switched to an ASC primer which has been trouble-free for the past 300 hours. The ASC primer has 1/8" NPT inlet and outlet ports allowing flared AN fittings to be used with your copper tubing.

I use an AN4022-1 discharge nozzle for better atomization. Search AN4022-1 on the Spruce site for this and other parts for the nozzle. For ease of soldering, get the brass AN800-2 union cone. They sell a AN800-2C which is SS and more difficult to solder. I found a quality silver solder and a good flux a must for joining the union cone to copper line. Buy a few extra AN800-2 union cones to practice on. They're only $1.21 each.

Hope this helps.

-Scott

[vands]

for safety the ASC ,copper and 4022-1 nozzle would be the best route. Not the cheapest but not excessive cost.

[hans]

Probably showing my ignorance here, so please enlighten me:
why use a primer at all? On my S-II, pulling six blades with the mixture full rich and half throttle is enough preparation/priming to start the engine with one or two pulls. My S-II has a 32mm AeroInjector mounted on a 2180cc VW.

Hans

[splischke]

A primer is needed for my Ellison TBI. It doesn't allow fuel past the diaphragm pump until the engine is running.

[hans]

Sept 10, 2011 10:19:39 GMT -5 splischke said:

A primer is needed for my Ellison TBI. It doesn't allow fuel past the diaphragm pump until the engine is running.

Ok, thanks for that information.

[oahupilot]

Sept 10, 2011 10:19:39 GMT -5 splischke said:

A primer is needed for my Ellison TBI. It doesn't allow fuel past the diaphragm pump until the engine is running.

know the feeling