Certification: ISO9001 factory production; CE documents available upon request
Real Product Photos: Steel crankshaft labyrinth overview, sealing groove detail, crankshaft assembly reference picture
This heavy‑duty steel crankshaft labyrinth serves as a reliable aftermarket replacement compatible with Tohatsu and Nissan M, NS, F‑series 9.9HP,15HP and 18HP marine outboard motors. It interchanges with OEM part numbers 350‑00051‑1 and 350‑00051‑0.
Precision CNC‑machined from high‑strength alloy steel, this labyrinth sealing component delivers outstanding wear‑resistance, structural rigidity and reliable salt‑water anti‑corrosion performance for long‑term crankcase marine operation.
It builds an effective labyrinth‑style seal around the crankshaft journal. It minimizes oil blow‑by, prevents crankcase lubricant leakage, and keeps moisture and fine contaminants out of the crankcase when the outboard works under demanding boating conditions.
This steel part is strictly produced according to original OEM specifications, maintaining precise fitting clearance and stable sealing effect during high‑speed crankshaft rotation. It resolves common crankcase‑related troubles including oil seepage, excessive oil consumption and internal crankcase contamination caused by worn‑out original labyrinth parts.
All critical dimensions comply with OEM standards. You can complete quick, straightforward drop‑in installation, and no trimming or extra adjustments are needed. Thoroughly clear burrs and clean mating surfaces prior to fitting. Avoid scratching the precision sealing grooves throughout assembly.
Swap your worn, deformed or damaged factory crankshaft labyrinth with this steel spare component, and you will restore dependable crankcase sealing performance for your outboard. Follow regular marine maintenance schedules. These good practices extend engine service life and sustain stable engine performance out on the water.
Boat Motor Ladyrinth Washer Seal 350-00051-1 for Tohatsu Nissan Outboard 9.9HP 15HP 18HP 2/4 stroke Engine
For Tohatsu Nissan Models: M NS F 9.9, 15, 18 horsepower (2 & 4 stroke) engines.
Ladyrinth Washer Seal
Boat Motor for Outboard Engine
PISTON & CRANKSHAFT | 18 HP | 2002 | Evinrude | M18E2 |
PISTON & CRANKSHAFT | 9.9 HP | 2002 and earlier | Nissan Outboard | NS15D |
PISTON & CRANKSHAFT | 9.9 HP | 2002 and earlier | Nissan Outboard | NS9.9D |
PISTON & CRANKSHAFT | 9.9 HP | 2002 and earlier | Nissan Outboard | NS9.9D2 |
PISTON & CRANKSHAFT | 15 HP | 2002 and earlier | Nissan Outboard | NS15D2 |
PISTON & CRANKSHAFT | 15 HP | 2002 and earlier | Nissan Outboard | NS18E |
PISTON & CRANKSHAFT | 18 HP | 2002 and earlier | Nissan Outboard | NS18E2 |
PISTON & CRANKSHAFT | 9.9 HP | 2003 | Nissan Outboard | NS9.9D2 |
PISTON & CRANKSHAFT | 15 HP | 2003 | Nissan Outboard | NS15D2 |
PISTON & CRANKSHAFT | 18 HP | 2003 | Tohatsu Outboard | M18E2 |
PISTON & CRANKSHAFTX | 15 HP | 2003 | Tohatsu Outboard | M15D2 |
PISTON & CRANKSHAFT | 15 HP | 2002 | Evinrude | M15D2 |
PISTON, CRANK SHAFT | 9.9 HP | 2002 | Evinrude | M9.9D2 |
PISTON & CRANKSHAFT | 9.9 HP | 2002 | Evinrude | M9.9D |
PISTON & CRANKSHAFT | 9.9 HP | 2002 | Tohatsu Outboard | M9.9D |
PISTON, CRANK SHAFT | 9.9 HP | 2002 | Tohatsu Outboard | M9.9D2 |
PISTON & CRANKSHAFT | 15 HP | 2002 | Tohatsu Outboard | M15D2 |
PISTON & CRANKSHAFT | 18 HP | 2002 | Tohatsu Outboard | M18E2 |
PISTON & CRANKSHAFT | 9.9 HP | 2003 | Tohatsu Outboard | M9.9D2 |
PISTON & CRANKSHAFT | 18 HP | 2003 | Nissan Outboard | NS18E2 |



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