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Common Parts for the
5421 Model Engine
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Horsepower: 21
Produced from: 1978 to 1981
View online parts catalog for this engine with clickable part numbers for easy shopping
Download and print service manual for this engine

We carry hundreds of other parts for the 5421 that are not on this list. You can also find what you are looking for by part number or keyword using the search boxes above. Click on the part number of description below for pricing and purchasing information.

5421CPL   5421 Common Parts Listing
302181   Air Filter
301049   Air Filter Element
302280   Alternator
300238   Coolant Recovery Tank
300690   Custom Panel
300685   Deluxe Panel
300134   Dipstick
300203   Fresh Water Pump
298854   Fuel Filter
301385   Fuel Lift Pump
301385   Fuel Lift Pump
299049   Heat Exchanger (B)
300209   Oil Filter
200157   Operators Manual

200142   Parts Manual
302837   Pump Conversion Kit (includes pump)
302838   Pump Conversion Kit (includes pump)
302678   Pump Mounting Gasket
300204   Pump Mounting Gasket
302648   Sea Water Pump (E)
256912   Spare Parts Kit A
256802   Spare Parts Kit B
300680   Standard Panel
299512   Starter
300684   Tachometer
300687   Tachometer With Hour Meter
200151   Technical Manual
301358   Thermostat Element
300158   Valve Cover Gasket
300670   Water Temp Meter
299066   Water Temp Sender

(A) Qty -3 exhaust manifold gaskets required per engine
(B) 299049 is 2 inch diameter x 16 inch long
(C) 299838 consists of end cap gasket & bolt.
(D) Qty - 1 29878 & Qty - 2 298788 injectors are used per engine
(E) New style Sherwood pump - Does not have end cover plate (old Sherwood style has 6 end cap bolts old Oberdorfer style has 4 end cap bolts)
(F) This is pully only. Also required are Qty - 3 capscrews-Part Number 302046
(G) Part Number 300538 with studs or Part Number 299771 with screws.
(H) Thermostat is 160°
(I) 301069 zinc is used on 2 inch diameter heat exchangers

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