Fuel Primer Line

[whee]

Boost pump acts as the primer on fuel injected engines.

Unless the battery is dead. I would like to have the option of hand propping so I'll need a primer.

[Mark Moyle]

I built a gascolator from the "plans"(term used very loosely) shown in the LSA build book. I drilled/tapped an extra 1/8" pipe port for the primer next to the main outlet.

As an alternate, when I was looking at various build photos, I saw at least one installation where the primer drew from a T installed close to one of the T's that tie the front/rear tank outlets together. IIRC, it was in the line coming down from the front tank outlet. I expect that would work just as well and might even make routing of the primer feed line easier.

This latter approach is probably the one I would have taken if I hadn't already taken the first approach.

Of course, my system is completely gravity feed so no pump that could "suck air".

If fuel injected, with an engine driven and a separate boost pump, my thoughts would be "What happens if the primer or any of its lines start to leak?" and let that guide the approach.

Boost pump acts as the primer on fuel injected engines.


Sent from my iPad using Tapatalk

[BTAZ]

I built a gascolator from the "plans"(term used very loosely) shown in the LSA build book. I drilled/tapped an extra 1/8" pipe port for the primer next to the main outlet.

As an alternate, when I was looking at various build photos, I saw at least one installation where the primer drew from a T installed close to one of the T's that tie the front/rear tank outlets together. IIRC, it was in the line coming down from the front tank outlet. I expect that would work just as well and might even make routing of the primer feed line easier.

This latter approach is probably the one I would have taken if I hadn't already taken the first approach.

Of course, my system is completely gravity feed so no pump that could "suck air".

If fuel injected, with an engine driven and a separate boost pump, my thoughts would be "What happens if the primer or any of its lines start to leak?" and let that guide the approach.

[whee]

When using the BH gascolator where do you connect the primer line to the main fuel line? Seems like just Ting in would create a potential to suck air into the system. All the systems I'm familiar with there is a primer port on the gascolator but I see the BH gascolator does not have this port.