MerCruiser 300 hp engine parts: choose the catalogue

MerCruiser 300 hp engine parts: choose the catalogue

Identify the correct MerCruiser 300 hp engine variant

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Finding the correct part number starts with accurately identifying your MerCruiser 300 hp engine. This family includes several closely related catalogues, notably those associated with the 4.2 EI, 4.2 ES and D4.2L 300 D-Tronic codes.

Before opening a MerCruiser exploded view, compare the engine code and serial number with the variants listed. The ranges distinguish the catalogues: 88050800 to 88060000, 88050001 to 88050643 or 0L667439 to 0M999999, depending on the version.

Once you have selected the exact catalogue, consult the MerCruiser diagram to identify the mechanical assembly, the part position and its part number. This check helps prevent errors between 300 hp versions with similar designations.

MerCruiser spare parts can therefore be searched using the information shown on the engine and the corresponding serial number range. If in doubt, check each identifier before selecting a part number.

MerCruiser 300 hp parts: identify the engine code and serial range before consulting the exploded view and part number.

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All engines

MCMC300A Moteur mercruiser cmd 4.2 ei 300 88050800 thru 88060000 MCMC300B Moteur mercruiser cmd 4.2 ei 300 vm 254 i_l6 88050001 thru 88050643 MCMC300C Moteur mercruiser cmd 4.2 es 300 88050800 thru 88060000 MCMC300D Moteur mercruiser cmd 4.2 es 300 vm 254 i_l6 88050001 thru 88050643 MD4D254B Moteur mercruiser d4.2l_300 d-tronic vm 254 i_l6 0l667439 thru 0m999999