If you need to replace the bakelite fuel pump bracket or fuel pump, you can't reuse the old gaskets. Buying a complete set of gaskets is a bit excessive, which is why they are also available separately.
They are fitted under the fuel pump and between the fuel pump bracket and the crankcase. For 25 and 30 hp and Type 4 engines, these are two equal gaskets; for other engines, the gasket between the pump and the flange and between the flange and the crankcase is different (you'll find the different gasket under the "options" tab).
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