Junglepilot
Well Known Member
Not much experience with Lycoming mech fuel pumps.
That said, I have the 90? fitting with the tap for fuel pressure line and wondering about the tightening sequence for the fitting into fuel pump.
The jam nut that presses the o-ring I understand, but how tight should the actual fitting be.
Right now snug + 1/4 turn leaves the 3/8 male pointing to accessory case which won't allow me to attach fuel line to carb. However concerned that another 3/4 turn may crack FP neck.
Is the purpose of the jam nut to allow for getting the fitting in the right position then allow the jam nut pressing the washer & o-ring to seal the joint without leaking? I added some fuel tank sealant to the threads also.
Thanks
That said, I have the 90? fitting with the tap for fuel pressure line and wondering about the tightening sequence for the fitting into fuel pump.
The jam nut that presses the o-ring I understand, but how tight should the actual fitting be.
Right now snug + 1/4 turn leaves the 3/8 male pointing to accessory case which won't allow me to attach fuel line to carb. However concerned that another 3/4 turn may crack FP neck.
Is the purpose of the jam nut to allow for getting the fitting in the right position then allow the jam nut pressing the washer & o-ring to seal the joint without leaking? I added some fuel tank sealant to the threads also.
Thanks