Engine intelligence
Marine engine reliability
The engine is the single biggest reliability and value variable on a used boat. Here's how each family holds up — and what to check before you buy one. Paste a listing to score the engine on the exact hours and year you're looking at.
Outboards
- 90 Yamaha 4-stroke outboard (F70–F300)
- 86 Suzuki 4-stroke outboard
- 86 Honda 4-stroke outboard
- 85 Mercury Verado / V8 FourStroke (250–400)
- 84 Yamaha 425 XTO Offshore
- 82 Mercury FourStroke (40–150)
- 80 Mercury Racing 450R
- 64 Mercury OptiMax (2-stroke DI, legacy)
- 50 Carbureted 2-stroke outboard (legacy)