0431705 Carburettor Assembly | Genuine Used Part

🔧 Product Description

Genuine BRP / OMC Carburettor Assembly - Part Number: 0431705

A genuine Johnson and Evinrude carburettor assembly for selected 1987 65HP and 70HP three-cylinder two-stroke outboards.

Three carburettors are used on the applicable engine, with one carburettor supplying each cylinder. Correct jetting, float level and synchronisation are essential for balanced fuel delivery across all three cylinders.

⚙️ Key Features

• Genuine BRP / OMC carburettor assembly
• Correct original part number 0431705
• Later service reference 0439423
• One carburettor used per cylinder
• Suitable for selected 65HP and 70HP three-cylinder engines

🚤 Compatibility

Commonly used on

• Johnson and Evinrude 65HP and 70HP three-cylinder carburetted outboards

Typically suits

• Engine models:
• 1987 Evinrude 65HP E65WMLCUA
• 1987 Evinrude 70HP E70ELCUR
• 1987 Evinrude 70HP E70TLCUR
• 1987 Johnson 70HP J70ELCUR
• 1987 Johnson 70HP J70TLCUR
• Three-carburettor intake assemblies using carburettor 0431705 or replacement 0439423
• HP Range: 65HP - 70HP
• Engine Type: Johnson / Evinrude three-cylinder carburetted two-stroke outboard
• Year Range: 1987

🔌 Function

The carburettor meters fuel and air for one cylinder. The three carburettors must operate together so each cylinder receives the correct mixture throughout starting, idle, acceleration and full-throttle operation.

⚠️ Common Signs of Failure

• Engine idles unevenly or stalls
• One cylinder runs lean or receives excessive fuel
• Fuel leaks from the bowl, needle or seat
• Engine hesitates during acceleration
• Blocked jets or incorrect float level reduce power

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0439423 → Supersedes 0431705
• 0431705 earlier OEM carburettor assembly
• 431705 unprefixed OEM reference

OEM / Related Numbers

• 0431705
• 431705
• 0439423
• 439423
• 0396701 related carburettor repair kit
• 0382363 related float
• 0396521 related needle and seat

Aftermarket / Verified Equivalents

• Sierra: 18-7222 carburettor kit with float
• Sierra: 18-7042 carburettor kit without float
• Sierra: 18-7210 carburettor float
• Sierra: 18-7093 needle and seat

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated