When I first did my fuel testing I struggled to get fuel to actually move through my pump. I ended up putting a vacuum on the line right before the mechanical pump which I assume broke an airlock or primed it.
Fast forward a few months and this week I did my 50ish hour oil change. With that checked my fuel filter. All was well and the plane started right up.
Today my son and I put the cowling on and I took him for a few laps around the pattern. Once I landed I noticed a small leak on the AN fitting to the boost pump. This actually may have been there a bit because it was so small that by the time I would remove the inspection panel to the tunnel I couldn?t find it. I actually invented a game called ?fuel or leather?? I would ask hangar neighbors what they thought they smelled. Anyhow left the panel off for this flight and put a piece of white paper under the assembly to locate it.
I replaced the fitting, connected everything back up and tried to start it.... no joy. Worked it for a bit, thought maybe I somehow introduced a containiment so went through some measures before pulling the top cowl and fixing it once again with the ole shop vac trick.
So my question is there a trick to either prevent this? If it occurs a method to correct it that doesn?t involve a shop vac?
Talking to a friend who owns a lot of large diesel equipment said his method if they swap a pump is to run it up 10 cycles before engaging the ignition (he defined a cycle as running it until the noise pitch changes then turning it off). Said failing to do that will cause it to airlock and you either have to let it sit overnight or manually dump fuel in the pump.
Fast forward a few months and this week I did my 50ish hour oil change. With that checked my fuel filter. All was well and the plane started right up.
Today my son and I put the cowling on and I took him for a few laps around the pattern. Once I landed I noticed a small leak on the AN fitting to the boost pump. This actually may have been there a bit because it was so small that by the time I would remove the inspection panel to the tunnel I couldn?t find it. I actually invented a game called ?fuel or leather?? I would ask hangar neighbors what they thought they smelled. Anyhow left the panel off for this flight and put a piece of white paper under the assembly to locate it.
I replaced the fitting, connected everything back up and tried to start it.... no joy. Worked it for a bit, thought maybe I somehow introduced a containiment so went through some measures before pulling the top cowl and fixing it once again with the ole shop vac trick.
So my question is there a trick to either prevent this? If it occurs a method to correct it that doesn?t involve a shop vac?
Talking to a friend who owns a lot of large diesel equipment said his method if they swap a pump is to run it up 10 cycles before engaging the ignition (he defined a cycle as running it until the noise pitch changes then turning it off). Said failing to do that will cause it to airlock and you either have to let it sit overnight or manually dump fuel in the pump.