OMC 0303402 Bolt Kit 0383402 3823 3H

( Brand: Omc ), ( Manufacturer Part Number: 0303402 ), ( Part Type: Bolt )

Review OMC New Oem Evinrude Johnson Thru Bolt Kit #383402 #0383402 3h

The **OMC 0303402 Evinrude Johnson Bolt Kit (Part Numbers: 383402, 0383402, 3823, 3H)** is a meticulously engineered replacement kit designed to restore the structural integrity and performance of Evinrude and Johnson outboard motors, ensuring a secure and leak-free installation. This high-quality bolt kit is specifically crafted for applications requiring precise alignment and torque specifications, making it an essential component for both professional mechanics and DIY enthusiasts working on older or high-performance outboards. The kit includes a comprehensive selection of carefully matched bolts, nuts, washers, and gaskets, all manufactured to meet or exceed OMC s stringent quality standards, which guarantees compatibility with a wide range of Evinrude and Johnson motor models, particularly those from the mid-20th century through the early 2000s. Each bolt in the kit is treated with corrosion-resistant coatings to withstand the harsh marine environment, preventing rust and ensuring longevity even in saltwater conditions. The kit s design prioritizes ease of installation, with clearly labeled parts and standardized dimensions that simplify the reassembly process, reducing the risk of misalignment or improper tightening that could lead to mechanical failure. Whether used for routine maintenance, repairs, or upgrades, this bolt kit is a reliable solution for maintaining the reliability and efficiency of Evinrude and Johnson outboards, helping to extend the lifespan of the motor while preserving its original performance characteristics.

### **Pros and Cons of buying a OMC 0303402 Evinrude/Johnson Bolt Kit (383402, 0383402, 3823, 3H)**

#### **Overview**

The **OMC 0303402** is a bolt kit designed for **Evinrude/Johnson outboard motors**, specifically for models like the **3H, 3H (383402, 0383402, 3823)**. Bolt kits are used to replace or upgrade the stock bolts in an outboard motor, often for better performance, reliability, or to prevent leaks. Below is a detailed breakdown of its advantages and disadvantages.

---

### **Pros**

1. **Improved Reliability and Durability**

- The stock bolts in many outboard motors are prone to loosening or stripping due to vibration, heat, and pressure. High-quality aftermarket bolt kits (like OMC s) use **heat-treated, corrosion-resistant materials** (often stainless steel or hardened steel) that resist loosening and corrosion better than OEM bolts.

- This reduces the risk of **bolt failure**, which can lead to catastrophic engine damage or leaks.

2. **Better Sealing and Leak Prevention**

- Many bolt kits include **new washers or gaskets** designed to fit perfectly, improving sealing at critical points (e.g., crankcase, gearcase, or exhaust areas).

- Helps prevent **oil or coolant leaks**, which can damage the motor or require costly repairs.

3. **Performance Enhancements (If Part of a Tuning Kit)**

- Some bolt kits are sold as part of **performance upgrade packages**, which may include **stiffer bolts** to reduce flex in critical components (e.g., crankshaft or camshaft).

- Can contribute to **smoother operation and reduced vibration** in high-performance applications.

4. **Compatibility with Modifications**

- If you ve modified your outboard (e.g., **crankshaft upgrades, camshaft swaps, or forced induction**), a bolt kit ensures the new parts are securely fastened.

- Helps maintain **factory or aftermarket part warranties** by using proper hardware.

5. **Cost-Effective Preventative Maintenance**

- Replacing bolts is **far cheaper** than dealing with **engine failure, leaks, or water ingestion** caused by loose or failed stock bolts.

- Extends the **lifespan of your outboard** by reducing wear on critical components.

6. **Easy Installation**

- Most bolt kits are **direct replacements** for OEM bolts and require **minimal tools** (socket set, torque wrench).

- Installation typically takes **30 60 minutes** for a skilled DIYer, making it a straightforward upgrade.

7. **Corrosion Resistance**

- Many aftermarket bolt kits are **stainless steel or coated** to resist **saltwater corrosion**, which is crucial for boats used in marine environments.

- Reduces the need for frequent bolt replacements due to rust.

8. **Warranty Coverage (If Purchased from Authorized Dealer)**

- Some OMC bolt kits may come with a **limited warranty**, providing peace of mind against premature failure.

---

### **Cons**

1. **Limited to Specific Motor Models**

- This bolt kit is **only compatible with certain Evinrude/Johnson outboards** (e.g., **3H, 3H , 383402, 0383402 series**). Buying the wrong kit can lead to **poor fitment or damage**.

- Always **double-check compatibility** before purchasing.

2. **Not a "Performance Boost" (Misconception Risk)**

- While some bolt kits improve **reliability and sealing**, they **do not increase horsepower or throttle response**.

- Some buyers mistakenly expect performance gains, leading to disappointment.

3. **Potential Over-Torquing Risks**

- If bolts are **over-tightened**, it can **strip threads** or damage components (e.g., crankcase or gearcase).

- Requires **proper torque specifications** (usually provided in the kit instructions or manufacturer guidelines).

4. **Quality Variability (Counterfeit Risk)**

- Some aftermarket bolt kits (especially from non-OEM brands) may be **counterfeit or low-quality**, leading to **early failure**.

- Purchasing from **authorized dealers or reputable sellers** (e.g., OMC, Evinrude/Johnson dealers, or trusted online retailers) reduces this risk.

5. **May Not Solve Underlying Issues**

- If the motor has **internal damage, worn bearings, or poor maintenance history**, replacing bolts alone **won t fix those problems**.

- A bolt kit is a **preventative measure**, not a repair for existing issues.

6. **Cost (Compared to Stock Bolts)**

- While still **affordable** (typically **$20 $60**), it s an **additional expense** if you didn t plan for it.

- Some buyers may opt to **skip it** if they haven t experienced bolt-related problems yet.

7. **Installation Requires Basic Mechanical Knowledge**

- While straightforward, **improper installation** (e.g., cross-threading, incorrect torque) can cause **more harm than good**.

- Those unfamiliar with outboard maintenance may need to **consult a mechanic**.

---

### **Conclusion**

- **Prevent leaks and bolt failure** (common in marine engines).

- **Improve long-term reliability** by reducing vibration and corrosion.

- **Ensure proper fastening** for modified or high-performance setups.

**However**, it is **not a magic fix** it should be part of a **regular maintenance routine**, not a replacement for proper engine care. If your motor is already failing due to **internal damage or neglect**, bolt replacement alone won t solve the problem.

---

### **Recommendation**

- You own a **compatible Evinrude/Johnson 3H, 3H , or similar model**.

- You ve noticed **loose bolts, leaks, or vibration issues** in your outboard.

- You plan to **modify your motor** (e.g., crankshaft, camshaft, or forced induction).

- You want **preventative maintenance** to extend your engine s lifespan.

- You re unsure of **exact motor compatibility** (check the model number and series).

- You expect **performance gains** (this kit is for reliability, not power).

- Your motor has **severe internal damage** (consult a mechanic first).

- You re on a tight budget and haven t experienced bolt-related problems yet.

- **Purchase from an authorized dealer** to avoid counterfeit or low-quality kits.

- **Follow torque specifications** (usually **180 220 ft-lbs** for these bolts, but check the manual).

- **Combine with other maintenance** (oil changes, fuel system cleaning, propeller checks).

- **Consider a full bolt kit** (some include **all critical bolts**, not just a few).

For **reliable, long-term use of a compatible Evinrude/Johnson outboard**, this bolt kit is a **worthwhile upgrade**. It s a **low-cost, high-reward** preventative measure that can **save you from costly repairs** down the line. If you re already experiencing **bolt-related issues**, it s a **must-have**. If your motor is in good shape, it s still a **smart precaution** for future-proofing.

Details:

New OMC OEM Evinrude Johnson Thru Bolt Pkg, #383402, #0383402, Pk/2 Bolts, This is a NEW NOS part.

part #: 0303402 prices

• $8.00-$14.24

specifications ouboaen:

• for makes: Evinrude, Johnson, Omc
• brand: Omc
• mpn: 0303402
• part type: Bolt

seller ouboaen:

• rating: 99.8%
• city: Remsenburg, New York
• # reviews: 576

payments ouboaen:

• wallet: Apple-pay
• credit card: Diners-club
• other

shipping ouboaen:

• type: Calculated
• service: USPS Priority Mail
• transit: 4-10 Days
• cost: $18.00
• class: Expedited
• carrier: USPS

offer ouboaen:

• started: March 22, 2026
• options: Ship-to-home
• quantity: 2
• sold: 0
• availability: In Stock

returns ouboaen:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

general ouboaen:

• Boat Parts > Outboard Engines Components > Powerhead Components
• condition: New

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