Yamaha ME420STI (Hydra Drive) Marine
Yamaha Inboard Yamaha ME420STI (Hydra Drive) · YA-ME family — specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
The Yamaha ME420STI is a marinized Toyota 1HD-series 4.2 L inline-6 diesel (1HDT / 1HD-FT lineage per rebuild techs). Many internals cross to Toyota 1HD; Yamaha ART pistons/rings and some marinizing parts are proprietary — verify fitment. source
247 hp @ crankshaft (Batmagasinet 1992 launch data); predecessor to ME421
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
External links — we host none of these documents.
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- Category
- Marine
- Engine family
- YA-ME
- Year range (approx)
- from 1991
- Cylinders
- 6
- Rated output
- 247 hp (181.7 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).