Outboard Crankshaft Ladyrinth M NS F 9.9, 15, 18 HP (2 & 4 stroke) 350-00051-1

Certification: ISO9001 factory production; CE documents available upon request

Real Product Photos: Crankshaft labyrinth overview, sealing‑groove detail, crankshaft assembly reference picture

This heavy‑duty aftermarket crankshaft labyrinth is a reliable drop‑in replacement for Tohatsu and Nissan M‑NS‑F series 9.9HP,15HP and 18HP two‑stroke and four‑stroke marine outboard motors. It matches OEM part number 350‑00051‑1.

Precision‑CNC‑machined from high‑strength alloy steel, this labyrinth sealing part features great wear‑resistance, stable structural rigidity and solid salt‑water anti‑corrosion property for continuous crankcase marine working conditions.

It forms an effective labyrinth‑type seal around crankshaft journal surfaces. It reduces oil blow‑by, inhibits crankcase oil leakage, and blocks external moisture and fine dust from entering the crankcase while your outboard runs under tough on‑water operating conditions.

This component is strictly produced per original OEM specifications, maintaining accurate fitting clearance and consistent sealing performance during high‑speed crankshaft rotation. It fixes typical crankcase‑related troubles such as oil seepage, excessive lube‑oil consumption and crankcase contamination triggered by worn‑out original labyrinth parts.

All key dimensions comply with OEM standards. You can complete quick, straightforward drop‑in installation, and no trimming or extra adjustments are needed. Thoroughly remove burrs and clean mating surfaces prior to fitting. 

Take care not to scratch the precision sealing grooves during assembly.

Replace your worn, deformed or damaged factory crankshaft labyrinth with this aftermarket spare part, and you will restore dependable crankcase sealing for your outboard.

 Follow regular marine maintenance schedules. These good practices extend engine service life and preserve 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 |