What you might see if you shut down the engine with the key instead of mixture.

[Nukemzzz]

Note:  I thought I had a fuel pump failing causing a leak out of the weep hole.  Turns out I just forgot to use the mixture to shut down and the boost pump was still on a few seconds as I powered down. This put fuel in intake that then came out the bottom of the intake drain tube...shared with fuel pump weep tube.

---------------------

Started leaking a little from the weep hole hose this weekend.  Saw it on shutdown while putting down the nose chocks.  I have a 8hr round trip to Florida coming next weekend and I'm hoping to rush order a replacement and get it in this weekend.  M20E SN 1126.  IO-360-A1A

According to the Tempest overhauled FP guide on Aircraft Spruce I probably have the vintage "laminated" arm style... but it was maybe upgraded to a modern pump (It was installed 460hrs ago in 2005 during an overhaul). It's clear that I need the 25-30psi version....that much i'm sure of.  lol

Spruce claims I can get the vintage overhauled pump here by Wed... if I can't tell for sure I suppose I should order it. The vintage one:  https://www.aircraftspruce.com/catalog/pnpages/05-02531.php

The Mooney Parts manual claims I need: 6640296.  A web search for this number turns up nothing relevant other than the Spruce listing for the modern pump with the notes on it to use the vintage pump if the engine hasn't been converted to the modern:  https://www.aircraftspruce.com/catalog/pnpages/05-19010.php?gclid=Cj0KCQjwjvaYBhDlARIsAO8PkE1Kzu44-sWgDgclIeQkwfw-cad4bs4K7hrakTLDvjXXWjj72pX-WNEaArjTEALw_wcB

I'm pretty certain I can't check this part number without pulling the pump because it has the cooler over it making it impossible to see.  Is there an easy way to tell visually without removing the pump?  If I understand correctly the modern pump is is a little larger than the vintage style?

 

[EricJ]

3 minutes ago, Nukemzzz said:

Started leaking a little from the weep hole hose this weekend.  Saw it on shutdown while putting down the nose chocks.  I have a 8hr round trip to Florida coming next weekend and I'm hoping to rush order a replacement and get it in this weekend.  M20E SN 1126.  IO-360-A1A

According to the Tempest overhauled FP guide on Aircraft Spruce I probably have the vintage "laminated" arm style... but it was maybe upgraded to a modern pump (It was installed 460hrs ago in 2005 during an overhaul). It's clear that I need the 25-30psi version....that much i'm sure of.  lol

Spruce claims I can get the vintage overhauled pump here by Wed... if I can't tell for sure I suppose I should order it. The vintage one:  https://www.aircraftspruce.com/catalog/pnpages/05-02531.php

The Mooney Parts manual claims I need: 6640296.  A web search for this number turns up nothing relevant other than the Spruce listing for the modern pump with the notes on it to use the vintage pump if the engine hasn't been converted to the modern:  https://www.aircraftspruce.com/catalog/pnpages/05-19010.php?gclid=Cj0KCQjwjvaYBhDlARIsAO8PkE1Kzu44-sWgDgclIeQkwfw-cad4bs4K7hrakTLDvjXXWjj72pX-WNEaArjTEALw_wcB

I'm pretty certain I can't check this part number without pulling the pump because it has the cooler over it making it impossible to see.  Is there an easy way to tell visually without removing the pump?  If I understand correctly the modern pump is is a little larger than the vintage style?

 

Cheapie borescope is your friend to be able to get to part numbers like that.

Just search amazon or your favorite on-line retailer for "endoscope" or "borescope":

https://www.amazon.com/Inspection-Fantronics-Waterproof-Borescope-Adjustable/dp/B071HYRPND

[47U]

18 minutes ago, Nukemzzz said:

I'm pretty certain I can't check this part number without pulling the pump because it has the cooler over it making it impossible to see.  Is there an easy way to tell visually without removing the pump?

Your logbooks might (should) list the part number and serial number of the pump installed at last engine overhaul… crossing fingers, good luck.

[N201MKTurbo]

If you are going to change it, just pull the old one and you will know what you have.

[N201MKTurbo]

Too bad you are not near by, I have a modified Allen socket that makes it easier.

[Nukemzzz]

21 minutes ago, N201MKTurbo said:

If you are going to change it, just pull the old one and you will know what you have.

Yeah, but I’m trying to order overnight shipping from spruce today so I have a chance of flying to Florida yet next weekend. 

[Ragsf15e]

You sure it’s from the pump and not the (very similar and nearby) sniffle drain?  Seems like an early death. They usually last a long time.

[Nukemzzz]

35 minutes ago, 47U said:

Your logbooks might (should) list the part number and serial number of the pump installed at last engine overhaul… crossing fingers, good luck.

I just went through all the paperwork. The receipts etc. Can’t find that one receipt. It just said mechanical fuel pump replaced in the entry. Grrr

[Ragsf15e]

Just now, Nukemzzz said:

I just went through all the paperwork. The receipts etc. Can’t find that one receipt. It just said mechanical fuel pump replaced in the entry. Grrr

A few drips of fuel out the sniffle valve is normal… you sure it’s the pump?

[Nukemzzz]

1 minute ago, Ragsf15e said:

You sure it’s from the pump and not the (very similar and nearby) sniffle drain?  Seems like an early death. They usually last a long time.

Ohh. Interesting thought that. 

So my bird is missing the sniffle valve, however, the airbox vent does connect to the same place as the fuel pump weep. They come out the same pipe. 

It’s fuel for sure. About a tablespoon maybe. Now that I think about it…it didn’t start coming out until I pushed it back last night and then it was say…spitting…not drip drip drip. 
 

But why would I have so much fuel in the intake?  

[Nukemzzz]

Well crap. You might be on to something. I just remembered something else. 
 

I forgot and shut the plane off with the key instead of the mixture yesterday. I saw it when I went to start later and the mixture was in. And the boost pump would have still been running for a few seconds while I shut things down. I bet that’s all this is. 

[Nukemzzz]

Yeah. Pretty sure this is what’s happened. That makes this a pretty embarrassing post.  

Now the question is if I should leave it as a warning to others. Lol

The good news is I’ve always got my eyes peeled from something out of the ordinary, and Mooneyspace discussion maybe saved me $1500!

The bad news is when I shut down I forgot I wasn’t driving my old car! (my current cars don’t even have a key)

[MooneyMitch]

23 minutes ago, Nukemzzz said:

Yeah. Pretty sure this is what’s happened. That makes this a pretty embarrassing post.  

Doesn’t MS have a “delete “ button?

[Ragsf15e]

30 minutes ago, Nukemzzz said:

Yeah. Pretty sure this is what’s happened. That makes this a pretty embarrassing post.  

Now the question is if I should leave it as a warning to others. Lol

The good news is I’ve always got my eyes peeled from something out of the ordinary, and Mooneyspace discussion maybe saved me $1500!

The bad news is when I shut down I forgot I wasn’t driving my old car! (my current cars don’t even have a key)

The $1500 pales in comparison to the number of curse words uttered while removing and replacing the fuel pump.  Especially unhooking and hooking up the intake line.  You’re welcome.

[A64Pilot]

Ref the borescope, if you don’t have one sometimes you can position your phone and get a pic of a data plate you can’t see.