Yamaha ME422STI (Hydra Drive) Marine
Yamaha Inboard Yamaha ME422STI (Hydra Drive) · YA-ME family — specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
The Yamaha ME422STI continues the ME420/421 4.2 L six on a Toyota 1HDT-lineage block. Buy industrial 1HD parts where they match; do not assume Land Cruiser pistons under marine boost. source
245 hp ISO 3046-1 (Yamaha Hydra Drive brochure)
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
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- Category
- Marine
- Engine family
- YA-ME
- Year range (approx)
- from 2003
- Cylinders
- 6
- Rated output
- 245 hp (180.2 kW)
- Bore × stroke
- 94 × 100 mm
- Displacement
- 4164 cc
- Max rpm
- 3800
- Aspiration
- Turbocharged + intercooled
Related YA-ME engines
Open the full interactive engine page → (specs, cross-references & parts).