Home | What fuel boost pump goes on my 1975 Sundowner (or Musketeer, or Super, or Sport, or Sierra)? I can’t find the numbers, and the one I’ve been told is in the parts book apparently is not made anymore. Search strings- boost pump, fuel pump, electric b

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What fuel boost pump goes on my 1975 Sundowner (or Musketeer, or Super, or Sport, or Sierra)? I can’t find the numbers, and the one I’ve been told is in the parts book apparently is not made anymore. Search strings- boost pump, fuel pump, electric b

What fuel boost pump goes on my 1975 Sundowner (or Musketeer, or Super, or Sport, or Sierra)? I can’t find the numbers, and the one I’ve been told is in the parts book apparently is not made anymore.
Search strings- boost pump, fuel pump, electric boost, electric fuel, standby pump, Facet, Dukes, Weldon)

There are two Service Instructions/Service Bulletins that called for electric fuel pump replacement on the 12V carbureted planes. You can check the documentation for applicability to your serial number airframe. The applicable documents are:

SI0861-281, which calls for replacement of the obsolete pump by using a kit #23-9020-3, containing 12V pump #477983. This PN superseded Walbro pump #6014, and probably some other numbers since lost to history. The kit also contained some standard fittings, and some aluminum channel and hardware to mount the new pump.

SB2381, which essentially revises the earlier SI to incorporate an updated 12V fuel pump part number; 58-920054-3.

If either of these items have been previously complied with, there should be related entries in the airframe logbook. If they have not been done yet, installing a replacement pump will likely entail some minor fabrication and standard mounting hardware by the A&P, with reference to the diagrams in SI0861-281 and SB2381, and the suggested logbook text in the SI/SB. This data is all contained on the Beech Aero Club website for members.

Both of these documents call for kit #23-9020-1 S. Note that there is a blank between the 1 and the S in the kit part number, in the RAPID part system identification. If you leave out the blank during a search, it will not come up. The best thing is to search for hits on the core number (23-9020). This kit includes some hardware, some AN tubing fittings, some pre-bent and flared lengths of tubing, a reinforcement channel, and a new boost pump. The kit price is currently listed as $584.78, but it is not projected as becoming available until January 29 of 2005.

Unfortunately, neither the kit (23-9020-1 S), nor the two different fuel pump numbers, are presently available from Beech. The 12V fuel pump number has been superseded yet again to PN 58-920054-0019. There are also, however, a number of alternative parts sources listed on the BAC site. With the latest PN I have provided, you can probably locate a new pump.

Please note that this information applies only to the carbureted planes. The fuel injected planes (165 HP Continental and 200 HP Lycoming) have different applicable SI/SB’s, and different pumps (different type and higher pressure).

Addendum 03/31/2009 by Mike Rellihan:
Here is all the current data for electric boost pumps for both 14V and 28V planes, both carbureted and fuel-injected:

1816-00-1 12V FI Fuel Boost Pump
1420-00-1 24V FI Fuel Boost Pump
477983 Facet 12V Carbureted Fuel Boost Pump (original part number)
58-920054-0019 Facet 12V Carbureted Fuel Boost Pump (superseding P/N)
478587 Facet 24V Carbureted Fuel Boost Pump (original part number)
58-920054-5 Facet 24V Carbureted Fuel Boost Pump (superseding P/N)
58-920054-21 Facet 24V Carbureted Fuel Boost Pump (superseding P/N)

Addendum 01/16/2006 by Bob Steward, A&P-IA:

There are several salvage yards that might be able to help you. Atlanta
Air Salvage (GA), White Industries (MO), Wentworth (MN) and others all have Musketeers that they are parting out.

You might take yours out and see if it matches up to the current offerings
from Facet, etc. FletchAir in Houston TX sells one that is PMA approved
for Grummans, and it LOOKS like it would fit a Musketeer. Never tried it.

Thank you for adding to the resources available for your Fellow BAC Members.