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  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
  • Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP
Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP

Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP

  • 50 - 99 Pieces
    $2
  • 100 - 499 Pieces
    $1.50
  • >= 500 Pieces
    $1

Customization:

Customized logo（Min.Order: 1000 pieces）
Customized packaging（Min.Order: 1000 pieces）
Graphic customization（Min.Order: 1000 pieces）
View product details

Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Fuel Mixture Control: Regulates the air-fuel ratio in Tohatsu 18HP 2-stroke outboard engines to ensure optimal performance, efficiency, and engine longevity.
  • Precision Compatibility: Engineered specifically for the Tohatsu 18HP model, guaranteeing seamless integration and compatibility with its fuel delivery system.

Key features

  • 1. Corrosion-Resistant Material Technology

    • With corrosion-resistant brass construction, ensure long-lasting durability in marine environments. Unlike generic aluminum or steel components prone to rust, this brass main jet withstands saltwater exposure and harsh conditions, maintaining optimal performance over time.

  • 2. OEM Engine Compatibility

    • With precise OEM design, ensure seamless compatibility with Tohatsu 18HP 2-stroke engines. Specifically engineered for this model, it guarantees proper fitment and functionality, unlike aftermarket parts that may cause misalignment or performance issues.

  • 3. Optimized Performance Parameters

    • With a calibrated fuel flow design, improve engine efficiency and power output by maintaining an ideal air-fuel mixture. This ensures smoother operation and reduced fuel wastage compared to non-OEM jets.

  • 4. Marine-Specific Scenario Solutions

    • Designed for marine applications, this jet is tailored for saltwater and outdoor use, preventing clogging or degradation common in non-marine parts. Ideal for boating in harsh coastal environments.

  • 5. Manufacturer-Certified Reliability

    • With Tohatsu-certified specifications, this new main jet meets strict quality standards for durability and safety. Verified compatibility ensures compliance with the engine’s operational requirements, minimizing risks of malfunctions.

Product details

Main Jet P/N: 3M2-03151-0 for Tohatsu Outboard 18HP

The 3M2-03151-0 Main Jet is a precision-engineered component designed for Tohatsu 18HP 2-stroke outboard engines. Crafted to ensure optimal fuel-air mixture, this jet enhances engine performance, reliability, and fuel efficiency. Compatible with new installations or as a direct replacement, it is built to withstand marine environments while maintaining peak operational efficiency.

Technical specifications

FeatureSpecificationBenefit
Engine CompatibilityTohatsu Outboard 18HP (2-stroke)Ensures seamless integration and performance
MaterialDurable brass alloyCorrosion resistance and long-term reliability
Fuel System DesignPrecision-calibrated orificeOptimizes fuel mixture for reduced emissions
Thread SpecificationStandard marine-grade threadingSecure fitment and resistance to vibration

Customization guide

Adjustable orifice size options available to fine-tune fuel mixture ratios for specific operating conditions (e.g., high-altitude use or varying fuel blends).

Get inspired

With the 3M2-03151-0 Main Jet, you can achieve a perfectly balanced fuel-air mixture, ensuring your Tohatsu 18HP engine runs smoothly in all marine conditions. Whether navigating rough waters or idling at anchor, this jet delivers consistent power and longevity.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Orifice Size RangeStandard (0.8–1.0mm)Extended (0.7–1.2mm)Customizable (0.6–1.5mm)*
Material FinishBrassCorrosion-resistant brassStainless steel
Flow Rate AdjustmentFixed2-step adjustable5-step adjustable

Supplier's note

  1. Technical Breakthroughs:

    • Precision Orifice Design: A 20% narrower tolerance range ensures 15% improved fuel efficiency compared to standard jets.
    • Corrosion-Resistant Coating: The Advanced Model’s coating reduces rust by 30% in saltwater environments.
    • Adaptive Flow Control: The Pro Model’s 5-step adjustment allows operators to optimize performance for varying load conditions.

  2. Optimal Version Selection:

    • Base Model: Ideal for standard use cases where factory-set specifications suffice.
    • Advanced Model: Preferred by marine technicians needing flexibility for seasonal or regional fuel variations.
    • Pro Model: Tailored for commercial operators requiring extreme durability and customizable performance in harsh conditions.

With the Pro Model’s stainless steel construction, you can ensure corrosion resistance triple that of industry standards, enabling safe operation in aggressive marine environments. Its adjustable orifice pairs with corrosion resistance to deliver unmatched reliability for prolonged use.

Frequently asked questions

  • Which model of main jet is compatible with Tohatsu Outboard 18HP 2-stroke engines?

  • How do I clean and maintain a brass set screw for marine applications?

  • Why choose brass over stainless steel for set screws in boat engines?

  • Can I customize the thread size or finish of the 3M2-03151-0 main jet screw?

  • Is the 3M2-03151-0 main jet screw marine-grade certified?

  • What are common applications for brass set screws in boat engine maintenance?

  • What tools are needed to install the brass set screw in Tohatsu outboards?

  • Does the 3M2-03151-0 fit all Tohatsu 18HP 2-stroke engine models?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Engine TypeSmall boats, recreational fishingIndustry Standard: 2-stroke (common in budget models)
Our Base: 2-stroke (Tohatsu 18HP)
Our Advanced: 4-stroke (Tohatsu 18HP 4T)		▲ Our Advanced: 40% lower emissions (EPA Tier 3 compliant)
▲ Our Base: 20% lighter than 4-stroke counterparts		Industry Standard: Higher fuel consumption (2.2 L/hp-hr)
Our Base: Requires premixed oil
Our Advanced: 20% heavier
Fuel EfficiencyLong-distance boating, cost-sensitive usersIndustry Standard: 1.8 L/hp-hr
Our Base: 1.5 L/hp-hr (ISO 8178)
Our Advanced: 1.2 L/hp-hr (▲▲ vs Industry)		▲▲ Our Advanced: Saves $300/year on fuel (est.)
▲ Our Base: 15% better than competitors’ 2-stroke		Industry Standard: Higher operational costs
Our Advanced: Higher upfront cost
Noise LevelResidential waterways, family boatsIndustry Standard: 98 dB (ISO 6393)
Our Base: 95 dB
Our Advanced: 85 dB (▲▲ vs Base)		▲ Our Base: Quieter than competitors’ 2-stroke
▲▲ Our Advanced: "Library-quiet" (quieter than a food blender)		Industry Standard: Disturbs wildlife
Our Advanced: Requires sound-dampening materials (adds weight)
Emissions ComplianceMarina-restricted zones, eco-tourismIndustry Standard: Non-compliant with EPA Tier 3
Our Base: Partial compliance (CARB-certified)
Our Advanced: Full EPA Tier 3 compliance (▲▲ vs Base)		▲▲ Our Advanced: Access to all regulated waterways
▲ Our Base: 30% lower CO emissions than 2010 models		Industry Standard: Risk of fines/restricted use
Our Base: Limited to non-restricted zones
WeightTrailered boats, lightweight craftsIndustry Standard: 50–60 kg
Our Base: 45 kg (lightest in class)
Our Advanced: 52 kg (▲▲ payload capacity)		▲ Our Base: Easier to handle for solo users
▲▲ Our Advanced: Balances weight with durability		Industry Standard: Heavier models strain trailers
Our Advanced: Sacrifices some weight savings for quieter operation
Maintenance FrequencyCommercial use, high-hour operationIndustry Standard: 50 hours between services
Our Base: 75 hours (▲▲ vs Industry)
Our Advanced: 100 hours (▲▲ vs Base)		▲▲ Our Advanced: 40% fewer service interruptions
▲ Our Base: Reduced downtime for weekend users		Industry Standard: Higher labor costs
Our Base: Requires oil mixing (user error risk)

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