Yamaha Hydra Drives
Yamaha Inboard Engines, Stern Drives and Yamaha Service Spares
If you are searching for an authorised dealer for Yamaha inboard engines and Yamaha sterndrive engines in Southampton then our team can help you. We are proud to be authorised Yamaha boat engine dealers and can provide you with a range of Yamaha services. We are Yamaha Stern Drive Diesel / Hydradrive main dealers and specialists. We regularly repair and recondition the Yamaha Hydradrive, Intermediates and engines. In fact, our team are such experts that we often have Yamaha boat engines sent to us from as far away as the Seychelles, Hawaii, British Virgin Islands, the Channel Islands and Ireland for service and repair.
Yamaha Inboard Engine Specialists
The marine engineers in our workshop in Southampton were trained by Yamaha Motor UK and therefore have an excellent working knowledge of the Yamaha diesel engines. If you need your Yamaha inboard engine or Yamaha sterndrive engine serviced or repaired, you can be assured that your engine is in expert hands. Our team can also recondition Yamaha starter motors, alternators, turbo chargers, heat exchangers, oil & water pumps (within 1 year’s conditional warranty).
As an authorised Yamaha dealer, we do not only provide you with new parts, but we also stock second hand spares. If you are searching for supply genuine and non-genuine Yamaha spares, our warehouse in Southampton has what you are looking for. Not just Yamaha inboard engine service and repair specialists, our team also manufacture stainless steel exhaust elbows and recondition all engine auxillary’s. If your Yamaha sterndrive engine is in need of repair then you can trust the BBMS Swanwick team of marine engineers to get your engine back up and running in no time.
As a family run business, we believe that a personal touch makes all of the difference. We will always provide you with the highest quality marine engine service and customer support. You can trust our marine engineers with your Yamaha boat engine. We treat every engine that we work on as though it was our own and that is why so many of our customers send their engines to us from around the world.
For the world experts in Yamaha inboard engines, you can trust BBMS Swanwick.
Need parts or help
repairing your hydra drive?
World specialists in the service and repair of Yamaha Hydra Drive Inboard Engines



PARTS CATALOGUE | |
ENGINE MODEL | ME422 HO STi |
MAX OUTPUT AT CRANKSHAFT | ISO 3046-1 205kW/3800rpm(275hp) |
MAXIMUM OUTPUT AT CRANKSHAFT | ISO 8665-1 192kW/3800rpm |
CYLINDERS | In-line 6 cylinder |
DISPLACEMENT | Litres(cu in) 4.16(254) |
BORE X STROKE | mm(ins) 94 x 100 (3.70 x 3.94) |
MAXIMUM MATCHING RPM | 3880-3980 |
VALVE ARRANGEMENT | 12-Valve Overhead Camshaft |
FUEL SYSTEM | Direct Injection – High-pressure rotary pump |
FUEL FILTER/WATER SEPERATOR | Standard – Water contamination warning |
ASPIRATION | Turbo Charged – Aftercooler |
COOLING | Closed circuit – Integrated heat exchanger |
SEA WATER PUMP | Mounted on engine(gear driven) |
SEA WATER FILTER | Standard |
BATTERY CHARGING | High Output(80 Amp) alternator |
EXHAUST SYSTEM | Through propeller hub |
WEIGHT | ENGINE 450kg |
WEIGHT | TOTAL PACKAGE(dry) Single prop – 551kg, TRP – 557kg |



PARTS CATALOGUE | |
ENGINE MODEL | ME432 HO STi |
MAX OUTPUT AT CRANKSHAFT | ISO 3046-1 235kW/3800rpm(315hp) |
MAXIMUM OUTPUT AT CRANKSHAFT | ISO 8665-1 220kW/3800rpm |
CYLINDERS | In-line 6 cylinder |
DISPLACEMENT | litres(cu in) 4.16(254) |
BORE X STROKE | mm(ins) 94 x 100 (3.70 x 3.94) |
MAXIMUM MATCHING RPM | 3670-3770 |
VALVE ARRANGEMENT | 24-Valve Overhead Camshaft |
FUEL SYSTEM | Direct Injection – High-pressure rotary pump |
FUEL FILTER/WATER SEPERATOR | Standard – Water contamination warning |
ASPIRATION | Turbo Charged – Aftercooler |
COOLING | Closed circuit – Integrated heat exchanger |
SEA WATER PUMP | Mounted on engine(gear driven) |
SEA WATER FILTER | Standard |
BATTERY CHARGING | High Output(80 Amp) alternator |
EXHAUST SYSTEM | Through propeller hub |
WEIGHT | ENGINE 460kg |
WEIGHT | TOTAL PACKAGE(dry) TRP – 567kg |



PARTS CATALOGUE | |
ENGINE MODEL | ME432 STi P2 |
MAX OUTPUT AT CRANKSHAFT | ISO 3046-1 213kW/3800rpm(285hp) |
MAXIMUM OUTPUT AT CRANKSHAFT | ISO 8665-1 203kW/3800rpm(272hp) |
CYLINDERS | In-line 6 cylinder |
DISPLACEMENT | Litres(cu in) 4.16(254) |
BORE X STROKE | mm(ins) 94 x 100 (3.70 x 3.94) |
MAXIMUM MATCHING RPM | 3720-3820 |
VALVE ARRANGEMENT | 24-Valve Overhead Camshaft |
FUEL SYSTEM | Direct Injection – High-pressure rotary pump |
FUEL FILTER/WATER SEPERATOR | Standard – Water contamination warning |
ASPIRATION | Turbo Charged – Aftercooler |
COOLING | Closed circuit – Integrated heat exchanger |
SEA WATER PUMP | Mounted on engine(gear driven) |
SEA WATER FILTER | Standard |
BATTERY CHARGING | High Output(80 Amp) alternator |
EXHAUST SYSTEM | Through propeller hub |
WEIGHT | ENGINE 460kg |
WEIGHT | TOTAL PACKAGE(dry) TRP – 567kg |



PARTS CATALOGUE | |
ENGINE MODEL | ME422 STi P2 |
MAX OUTPUT AT CRANKSHAFT | ISO 3046-1 183kW/3800rpm(245hp) |
MAXIMUM OUTPUT AT CRANKSHAFT | ISO 8665-1 173kW/3800rpm |
CYLINDERS | In-line 6 cylinder |
DISPLACEMENT | Litres(cu in) 4.16(254) |
BORE X STROKE | mm(ins) 94 x 100 (3.70 x 3.94) |
MAXIMUM MATCHING RPM | 3880-3980 |
VALVE ARRANGEMENT | 12-Valve Overhead Camshaft |
FUEL SYSTEM | Direct Injection – High-pressure rotary pump |
FUEL FILTER/WATER SEPERATOR | Standard – Water contamination warning |
ASPIRATION | Turbo Charged – Aftercooler |
COOLING | Closed circuit – Integrated heat exchanger |
SEA WATER PUMP | Mounted on engine(gear driven) |
SEA WATER FILTER | Standard |
BATTERY CHARGING | High Output(80 Amp) alternator |
EXHAUST SYSTEM | Through propeller hub |
WEIGHT | ENGINE 450kg |



PARTS CATALOGUE | |
ENGINE MODEL | ME372 STi |
MAX OUTPUT AT CRANKSHAFT | ISO 3046-1 123kW/3400rpm(165hp) |
MAXIMUM OUTPUT AT CRANKSHAFT | ISO 8665-1 120kW/3400rpm |
CYLINDERS | In-line 4 cylinder |
DISPLACEMENT | Litres(cu in) 4.16(254) |
BORE X STROKE | mm(ins) 94 x 100 (3.70 x 3.94) |
MAXIMUM MATCHING RPM | 3470-3570 |
VALVE ARRANGEMENT | 8 Overhead Valve |
FUEL SYSTEM | Direct Injection – High-pressure rotary pump |
FUEL FILTER/WATER SEPERATOR | Standard – Water contamination warning |
ASPIRATION | Turbo Charged – Aftercooler |
COOLING | Closed circuit – Integrated heat exchanger |
SEA WATER PUMP | Mounted on engine(gear driven) |
SEA WATER FILTER | Standard |
BATTERY CHARGING | High Output(80 Amp) alternator |
EXHAUST SYSTEM | Through propeller hub |
WEIGHT | ENGINE 370kg |
WEIGHT | TOTAL PACKAGE(dry) Single prop – 471kg, TRP – 477kg |