The PREMARINE 18HP 20HP 2-stroke outboard motor (built on the M18E2 platform) is a globally renowned commercial workhorse. Celebrated for its remarkable power-to-weight ratio, durability, and straightforward mechanical design, it is widely used on inflatable boats, aluminum fishing boats, and commercial tenders.

Key Technical Specifications

• Engine Type: In-line 2-Cylinder, 2-Stroke

• Displacement: 294 cc

• Bore x Stroke: 60.0 mm x 52.0 mm

• Full Throttle Operating Range: 5200 – 5800 RPM

• Fuel Induction System: Single Loop-Charged Carburetor

• Ignition System: Digital CDI

• Fuel-to-Oil Ratio: 50:1 (Pre-mix)

• Dry Weight: ~41 kg (90 lbs)

• Starting System: Manual Pull Start (Electric Start available on select variants)

Essential Maintenance & Replacement Parts

• Impeller: 3B2-65021-1 / 3B2-65021-0

• Water Pump Repair Kit: 3B2-W0078-0 / 3B2-W0078-1

• Spark Plugs: NGK BP7HS-10

• Thermostat: 346-65011-0

• Carburetor Assembly: 3G2-03100-0 / 3M5-03100-0

• CDI Unit Assembly: 3G2-06060-0 / 3G2-06021-0

• Propeller (Standard 3-Blade): 9.25 x 9 or 9.25 x 10

Aftermarket & Clone Engine Cross-Compatibility

The Tohatsu 18HP 2-stroke design is a primary baseline for compact, lightweight commercial clones:

• Parts Interoperability:

  • Gearcases, water pumps, drive shafts, ignition coils, and carburetors across Parsun and Hidea 18HP models share 1:1 dimensional compatibility with the Tohatsu M18E2 platform.

• PREMARINE Brand Compatibility:

  • PREMARINE produces OEM-spec replacement parts and full engine assemblies based on the Tohatsu 18HP (M18E2) design.

  • PREMARINE components—including lower unit assemblies, carburetors, water pump kits, CDI units, and propellers—deliver precise 1:1 fitment for original Tohatsu 18HP motors and equivalent aftermarket clone brands.