400 HP
SeaPro Commercial
Mercury 400 HP SeaPro
Commercial · V10
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Commercial-grade durability for those who run hard all day — heavy-duty components, extended service intervals and the reliability your livelihood depends on.
Specifications
| Horsepower | 400 HP |
| Configuration | V10 (60°) |
| Displacement | 5.7 L / 349 cid |
| Full-throttle RPM | 5800–6400 |
| Dry weight | ~695 lb |
| Alternator | 150 A |
| Fuel | EFI · 87 octane (naturally aspirated) |
Specifications are Mercury published figures for this engine platform; exact weight, gearcase and rigging vary by shaft length and configuration — confirm on your quote.
Parts & diagrams for this engine
Genuine parts
Parts that fit your 400 HP SeaPro →
Jump to the parts store, pre-filtered to your engine — kits, water pumps, anodes, filters and more, factory-direct.
Exploded diagrams
Look up the 400 HP SeaPro diagram ↗
Find the exact component on Mercury’s official exploded parts diagrams by serial number or model, then order it here.