343870 433000 Float Chamber Carb Bowl for Johnson Evinrude | JLM Marine

Float Chamber Carb Bowl 343870 433000 – Fits Johnson/Evinrude 2-Stroke 60° V4 & V6 Motors

This aftermarket replacement float chamber carburetor bowl is designed for Johnson/Evinrude 2-stroke 60-degree V4 and V6 carbureted motors ranging from 90 HP to 175 HP. Engineered to fit all non-fuel injected 60-degree configurations from 1991 to 2006, this component ensures reliable fuel delivery and carburetor performance across a wide range of outboard applications.

This float chamber directly replaces OEM part numbers 343870, 433000, and 766418, providing a cost-effective solution for carburetor maintenance and repair on both V4 and V6 60-degree motors. Note: This part does NOT fit Crossflow or 90-degree motors.

• Compatible with all 60-degree V4 and V6 carbureted motors (non-fuel injected)
• Direct replacement for multiple OEM part numbers
• Includes complete float chamber assembly as pictured

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands:

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here's a guide to help you identify your engine's serial/model: Johnson/Evinrude Serial Number Guide.

May fit other models not listed. Fits all 60-degree V4 and V6 carbureted motors (all years, non-fuel injected). Does NOT fit Crossflow or 90-degree motors.

Technical Specifications

Package Contents

Your purchase includes:

• 1 × Carburetor Float Chamber (Carb Bowl) Repair Kit
• The package contains all the parts shown in the product images.

Installation Guide

1. Disconnect the fuel line from the carburetor and ensure the engine is cool. Remove the engine cowling to access the carburetor assembly.
2. Remove the old float chamber by unscrewing the mounting bolts or screws securing it to the carburetor body. Carefully detach the chamber and note the orientation of gaskets and seals.
3. Clean the mating surfaces on the carburetor body to remove old gasket material, fuel residue, and debris. Ensure surfaces are smooth and dry.
4. Install the new float chamber by aligning it with the carburetor body, ensuring all gaskets and O-rings are properly seated. Torque mounting bolts evenly to manufacturer specifications to prevent leaks.
5. Reconnect the fuel line securely and check all connections for tightness. Prime the fuel system and inspect for leaks before starting the engine.
6. Test the engine at idle and under load to confirm proper fuel delivery and carburetor function. Adjust idle mixture if necessary per manufacturer guidelines.

Troubleshooting & FAQ

Q: How do I confirm this float chamber fits my Johnson/Evinrude outboard?
A: Check the Compatible Engine Models table above for your engine's HP, year, and configuration. This part fits all 60-degree V4 and V6 carbureted motors (non-fuel injected) from 1991–2006. It does NOT fit Crossflow or 90-degree motors. Verify your original part number matches 343870, 433000, or 766418.

Q: What are the signs that my carburetor float chamber needs replacement?
A: Common symptoms include fuel leaks around the carburetor bowl, rough idling, difficulty starting, flooding, or poor throttle response. Cracks, corrosion, or damaged gasket surfaces on the old chamber also indicate replacement is needed.

Q: Can I use this on a 90-degree or Crossflow motor?
A: No. This float chamber is designed exclusively for 60-degree V4 and V6 carbureted motors. Installing it on a 90-degree or Crossflow engine will result in improper fitment and fuel system malfunction.

Q: How often should I inspect or replace the carburetor float chamber?
A: Inspect the float chamber annually or whenever you perform carburetor maintenance. Replace it if you notice cracks, fuel leaks, corrosion, or if gaskets no longer seal properly. Regular inspection prevents fuel system failures.

Q: Is this an OEM part or an aftermarket replacement?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.