LYCOMING SB-621 Fuel pump diaphragm

[N400YS]

Hi Guys

 

Did you hear about this SB....  http://www.lycoming.com/Portals/0/techpublications/servicebulletins/SB621%20Fuel%20Pumps.pdf

 

Time to check your fuel pump!

 

Olivier

France

[Guest]

Another problem with Lycoming factory parts and engines, who would have guessed?

Clarence

[Steve65E-NC]

How hard would it have been to include a "built after" date.  If I knew my pump was installed before that date:  End of story.  Now I have to go look.

[KSMooniac]

I'm glad I purchased a Tempest!

[jetdriven]

Im not sure this model pump is installed on 360 Lycomings.  Mine for example, is an LW-15473

[MB65E]

I don't know how this applies to Moonys either. I looked it up today, and it didn't apply to me. LW-15473 (HI pressure) is what should be on the IO-360s and O-360s should have a LW-15472.(lower pressure)

And "ALL" the criteria needs to be there for it to be effective.

Odd,

-Matt

[N601RX]

It does apply to anyone who has a new engine or recently changed out pump.  LW-15473 was discontinued a while back and superseded with 62B26931.  I didn't look, but suspect the other number may be the low pressure pump.