Mechanical fuel pump

[Joe Afonso]

This major overhaul has turned out to be a hell of a project, guy who did the removal lost many parts, including my dipstick that seems impossible to replace, at least used.

i have a question, fuel pump has an inlet and outlet, plus it has a smaller tap in between the 2 diaphragms, does anyone know if this gets hooked up anywhere or does it just get plugged?

on a boat it would be run into the carb, but obviously not gonna happen in an airplane, any info on this would be much appreciated,,

[carusoam]

Fuel pumps have drains to allow leaks a place to exit.

Leaks are a sign of maintenance needed.  Seals have failed or a diaphragm has failed...

The drains typically have a related hole in the sheet metal below, that the fuel can escape through...

The mechanical fuel pump probably doesn’t get a hose for something that isn’t part of plan A... ?

One of the requirements for a shop to work on a plane, usually... is a copy of the Parts and Maintenance manuals..? 

See if you can find a copy of these manuals for your plane... they are basic, and very helpful with tube routing...

PP thoughts only, not a mechanic...

Best regards,

-a-

[Hank]

34 minutes ago, Joe Afonso said:

on a boat it would be run into the carb, but obviously not gonna happen in an airplane, any info on this would be much appreciated,,

Why not? The C in your avatar, like my own, has a very nice carb. 

[EricJ]

Consult the Integrated Parts Catalog for your airplane to see where all the parts go.   There are exploded drawings of the entire airplane.

[Prior owner]

A basic A&P rule is to never use a parts diagram to assemble anything....

that being said, the Mooney manual doesn’t leave you with much choice most of the time.

[Guest]

12 hours ago, Joe Afonso said:

This major overhaul has turned out to be a hell of a project, guy who did the removal lost many parts, including my dipstick that seems impossible to replace, at least used.

i have a question, fuel pump has an inlet and outlet, plus it has a smaller tap in between the 2 diaphragms, does anyone know if this gets hooked up anywhere or does it just get plugged?

on a boat it would be run into the carb, but obviously not gonna happen in an airplane, any info on this would be much appreciated,,

The small 1/8-27 NPT hole on the engine driven fuel pump is the vent and is meant to have a fitting and a hose out of the left cowl flap.

Clarence

[David Lloyd]

Aviation fuel pumps have two diaphragms with a drain between.  If the drain is leaking oil, the diaphragm nearest the engine is leaking but the pump continues to function.  If the drain is leaking fuel, the other diaphragm is leaking but continues to pump.  With either failure, fuel does not wind up in the crankcase, oil does not wind up in the fuel.

[Yetti]

On 5/30/2019 at 8:36 PM, PilotCoyote said:

A basic A&P rule is to never use a parts diagram to assemble anything....

that being said, the Mooney manual doesn’t leave you with much choice most of the time.

hammer to fit, paint to match.....      Always do an as built prior to moving dirt.

[cliffy]

If it doesn't fit,  grab a bigger hammer!

My 64D actually has a bulbed nipple on the lower cowling between the cowl flaps for the rubber tube to slide onto for the FP drain line.