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Westerbeke W 21A Engine

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As an Authorized Westerbeke Dealer, Diesel Parts Direct carries a great selection of genuine diesel engine parts. We stock most popular Westerbeke products like oil and fuel filters, and impeller kits and have them ready for immediate shipment. If you know the correct part number, please enter it in the search box located in the navigation bar, or use any of our quick links below to access the most common parts available for this model.

If you do not see the parts you are looking for, please use our quote request form or call us at 888.650.2771: our knowledgeable inside sales staff will gladly help you.


ZINC - 108B SIX / 11.0 BTD / 12.5 BTDA (1/4 NPT X 1-3/4)

$17.08

HEAT EXCHANGER GASKET - 11.0 BTD / 12.5 BTDA / 15.0 BTDA (2-3/4")

$6.44

FUEL SHUT-OFF SOLENOID - 10.0 BTD / 11.0 BTD / 12.5 BTDA (12V DC)

$231.03

THERMOSTAT GASKET - 12.5 WMD / 4.4 WMD / 6.0 WMD

$3.17

SPARE PARTS - 6.0 WMD / 8.0 WMD (KIT A)

$456.90

SPARE PARTS - 8.0 WMD (DELUXE KIT A)

$2,018.71

FUEL FILTER ELEMENT - 10.0 BTD / 11.0 BTD / 12.5 BTDA (WITH O-RINGS)

From $14.68

FUEL INJECTOR NOZZLE - 10.0 BTD / 11.0 BTD / 12.5 BTDA

$208.07

GASKET - 4.4 WMD (FRESH WATER PUMP TO ADAPTER)

$4.91

OIL PAN GASKET - 10.0 BTD / 35B-THREE / 6.0 BCD (3 CYLINDER)

$127.94

CYLINDER HEAD GASKET - 8.0 BTD / 8.0 WMD

$155.12

FUEL INJECTION PUMP - 6.0 BCD / 8.0 BTD / 8.0 WMD

$1,715.44

FUEL INJECTOR RETURN LINE - 10.0 BTD / 35B-THREE / 6.0 BCD

$932.33

FRESH WATER PUMP - 10.0 BTD / 11.0 BTD / 12.5 BTDA

$356.76

FAN BELT - 6.0 BCD / 8.0 WMD / 8.5 BTG (38.5 X O)

$25.27

UPPER ENGINE GASKET SET - 8.0 BTD

$747.11

COMPLETE ENGINE GASKET SET - 8.0 BTD / 8.0 WMD

$1,343.32

FRONT ISOLATOR - W41G / W70G (PRIOR TO JANUARY 1987)

$212.18

FUEL HARDWARE KIT - 10.0 BTD / 11.0 BTD / 12.5 BTDA

$219.38

OPERATOR MANUAL - W 13A / W 18 / W 21A / W 27A / W 33A

$29.48

OIL FILTER - 10.0 BTD / 20B TWO / 30B THREE (SPIN-ON)

From $17.82