90 HP
FourStroke
Mercury 90 HP FourStroke
EFI · 4-cyl
$16,580 MSRP
Quiet, fuel-efficient and refined — Mercury FourStroke outboards deliver smooth, reliable power with class-leading durability and the lowest maintenance in their class.
Specifications
| Horsepower | 90 HP |
| Configuration | Inline-4 |
| Displacement | 2.1 L / 127 cid |
| Dry weight | ~363 lb |
| Alternator | 35 A |
| Gearcase | 4.2" std (2.07:1) · 4.9" Command Thrust opt |
| Fuel | EFI · 87 octane |
| MSRP (base) | $16,580 |
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 90 HP FourStroke →
Jump to the parts store, pre-filtered to your engine — kits, water pumps, anodes, filters and more, factory-direct.
Exploded diagrams
Look up the 90 HP FourStroke diagram ↗
Find the exact component on Mercury’s official exploded parts diagrams by serial number or model, then order it here.