I've had 3 A&P's look at the primer and it still doesn't work. They looked over everything. We used an overhaul kit to replace the o-rings. It is still doing the following:
Sometimes it works normally on a cold start. It almost always works normally on a hot start.
Most of the time (usually after the airplane hasn't flown for 7+ days), the primer doesn't work. It pulls out and pushes back into the panel with no resistance and no sound. If you pull it out when it's not working this way, it will slowly be sucked back into the panel. It doesn't move any fuel. Sometimes if you physically hold the primer knob back in the aft position for 20-30 seconds, then push it in and prime again, it will start working. This doesn't always work either. I don't know what to do. Should we try to replace the knob/control?
Thanks!
Sometimes it works normally on a cold start. It almost always works normally on a hot start.
Most of the time (usually after the airplane hasn't flown for 7+ days), the primer doesn't work. It pulls out and pushes back into the panel with no resistance and no sound. If you pull it out when it's not working this way, it will slowly be sucked back into the panel. It doesn't move any fuel. Sometimes if you physically hold the primer knob back in the aft position for 20-30 seconds, then push it in and prime again, it will start working. This doesn't always work either. I don't know what to do. Should we try to replace the knob/control?
Thanks!
