819503A1 Mercury Solenoid Assy | Genuine Used Part

🔧 Product Description

Genuine Mercury Fuel Enrichener Solenoid Assembly - Part Number: 89-819503A1

A genuine used Mercury fuel-enrichment solenoid for carburetted 65HP to 125HP two-stroke outboards.

This component is an electrically operated enrichener or choke valve rather than a starter solenoid. When the key-switch choke circuit is activated, it opens a fuel passage that supplies additional fuel for cold starting. Mercury number 819503A1 supersedes earlier enrichener solenoid 437391.

⚙️ Key Features

• Genuine Mercury Marine fuel enrichener solenoid
• Correct part number 89-819503A1
• Supersedes earlier enrichener number 437391
• Used on carburetted three-cylinder and four-cylinder engines
• Includes the electrically operated valve and mounting clamp

🚤 Compatibility

Commonly used on

• Mercury carburetted three-cylinder two-stroke outboards
• Mercury carburetted four-cylinder two-stroke outboards
• Electric cold-start enrichment systems

Typically suits

• Engine models:
• Mercury 65 Jet - serial 0G760300 through 0T979999
• Mercury 65 Jet - serial 0P017000 through 0P325499
• Mercury 65 Jet three-cylinder - serial 0T980000 and above
• Mercury 75HP three-cylinder
• Mercury 80 Jet three-cylinder and four-cylinder
• Mercury 90HP three-cylinder
• Mercury 100HP four-cylinder
• Mercury 115HP four-cylinder
• Mercury 125HP four-cylinder
• Corresponding Mariner carburetted engines using 819503A1
• HP Range: 65HP - 125HP
• Engine Type: Mercury / Mariner carburetted two-stroke outboard
• Year Range: Primarily late-1990s through 2000s serial-number groups

🔌 Function

The solenoid opens the enrichment circuit during cold starting, allowing additional fuel to enter the intake or crankcase so the engine starts more easily.

⚠️ Common Signs of Failure

• Engine is difficult to start when cold
• Choke or push-to-prime function has no effect
• Fuel continuously enters the intake after starting
• Solenoid does not click when energised
• Fuel leakage around the enrichener valve

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 819503A1 → Supersedes 437391
• 437391 earlier Mercury enrichener-solenoid reference

OEM / Related Numbers

• 89-819503A1
• 819503A1
• 89819503A1
• 437391
• Enrichener valve solenoid
• Electric choke solenoid

Aftermarket / Verified Equivalents

• No verified aftermarket equivalent

📦 Condition

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