Yamaha Marine SX421KS & SX422KS Turbocharger Rebuild – BG Turbo Expertise

Presentation of the Yamaha Marine engines

Yamaha Marine diesel engines such as the ME370STI (6TC), ME420ST, and their derivatives are well known for their robustness and reliability in demanding marine applications. Used in both professional and leisure marine environments, these engines rely on water-cooled turbochargers to deliver consistent power, efficiency, and controlled fuel consumption.

Over time, harsh marine conditions, continuous engine load, and thermal stress can lead to turbocharger wear, directly affecting engine performance and reliability.

Turbocharger rebuild by BG Turbo

BG Turbo is fully equipped to rebuild marine turbochargers SX421KS, SX421KSH, and SX422KSH, fitted to Yamaha ME370STI and ME420ST engines.

The rebuild process includes:

• Complete turbocharger disassembly

• Precise dimensional and technical inspection

• Professional cleaning adapted to marine use

• Replacement of all wear components

• High-speed balancing of the rotating assembly

• Inspection of the water-cooling system

• Reassembly and functional validation

Each rebuild is performed to restore original performance while ensuring long-term durability in marine diesel applications.

Turbo repair and rebuild request form:
https://www.bg-turbo.com/reparation-renovation-reconditionnement

Why choose BG Turbo, a French turbocharger specialist

BG Turbo is a French workshop specializing in turbocharger rebuilding and reconditioning, including complex marine turbo applications.

Key advantages:

• Strong expertise in marine diesel turbochargers

• Fully equipped workshop with professional balancing machines

• Mastery of water-cooled turbo systems

• Solutions for rare or discontinued turbocharger models

• Technical support tailored to each application

BG Turbo provides a reliable and sustainable alternative to full turbocharger replacement.

Parts list and applications

High-performance turbocharger SX421KS / SX422KS: marine diesel turbocharger for Yamaha ME370STI (6TC) and ME420ST engines

Product description: high-performance marine diesel turbocharger

Turbo model: SX421KS
Fuel type: Diesel
Turbo part number: 6TC-14690-01, 6TC-1469001, 6TC-14690-00, 6TC14690-00
Previous versions: 6TC1469000, 6TC1469001
OEM numbers: N51-14690-00-00, N51146900000, N51-14690-00, N511469000, N51 14690 00, 53-14690-00, N53-14690-00, N531469000
Compatible turbo models: SX421KS, SX421KSH, SX422KSH
Engines: ME370STI (6TC), ME420ST, ME-420-DTIP1, ME-370-STI, ME-421-STI, ME-422-HO
Applications: Yamaha ME370STI, ME420ST, ME421STI, ME422STIP2 (4.16L) marine diesel engines
Cooling system: water cooling

FAQ

Can BG Turbo rebuild water-cooled marine turbochargers?
Yes, BG Turbo has the expertise and equipment required to rebuild water-cooled marine turbochargers used in diesel marine engines.

Is a rebuilt turbocharger as reliable as a new one?
A professionally rebuilt turbocharger can restore near-original performance and reliability, provided the rebuild follows strict technical procedures.

Does BG Turbo only rebuild Yamaha Marine turbochargers?
No, BG Turbo rebuilds marine, automotive, and industrial turbochargers across many brands and applications.

Hashtags

#BGTurbo #MarineTurbo #YamahaMarine #SX421KS #SX422KS #ME370STI #ME420ST #DieselTurbo #TurboRebuild #MarineDiesel #Turbocharger

Leave a review for our BG Turbo workshop if you were satisfied.
https://g.page/r/CcAIkUyx_KqqEB0/review

Download the technical article