0319318 0387800 Spark Advance and Throttle Lever | Genuine Used Part

🔧 Product Description

Genuine Johnson Evinrude Spark-Advance and Throttle-Lever Assembly - Part Numbers: 0319318 & 0387800

A genuine used OMC spark-advance lever and throttle-lever assembly for selected Johnson and Evinrude three-cylinder two-stroke outboard motors.

The spark-advance lever rotates the ignition timing base as the throttle is opened, while the throttle lever transfers movement from the control linkage to the carburettor cam. The two mechanisms work together to coordinate ignition timing and throttle opening.

⚙️ Key Features

• Genuine used Johnson / Evinrude linkage assembly
• Spark-advance lever part number 0319318
• Throttle lever part number 0387800
• Mechanical timing and carburettor-control components
• Factory geometry for correct link-and-sync adjustment

🚤 Compatibility

Commonly used on

• Johnson and Evinrude three-cylinder carburetted two-stroke outboards
• Mechanical spark-advance and throttle-linkage systems

Typically suits

• Selected Johnson 50HP, 55HP, 60HP, 65HP and 70HP engines
• Selected Evinrude 50HP, 55HP, 60HP, 65HP and 70HP engines
• Known 70HP applications from the late 1980s
• Exact fitment must be confirmed by model number because linkage geometry changed between production families
• HP Range: Approximately 50HP-75HP
• Engine Type: Inline three-cylinder carburetted two-stroke outboard
• Year Range: Primarily 1980s through early 1990s

🔌 Function

The assembly synchronises throttle opening with ignition-timing advance so the engine accelerates smoothly and reaches the correct full-throttle timing.

⚠️ Common Signs of Failure

• Engine hesitates during acceleration
• Ignition timing does not advance correctly
• Carburettors do not reach full throttle
• Lever pivot is worn or seized
• Linkage has excessive free play
• Cam follower does not track correctly
• Link-and-sync adjustment cannot be maintained

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0319318 original spark-advance-lever reference
• 0387800 original throttle-lever reference
• These numbers identify separate cooperating components rather than a direct supersession chain

OEM / Related Numbers

• 0319318
• 319318
• 0387800
• 387800
• 0336424 related throttle-lever-to-cam link
• 0330940 related shift lever
• 0434171 and 0431707 related throttle-cam assemblies
• Related timer-base link, cam follower and carburettor linkage

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Supplied as shown with included levers and attached hardware
• Correct link-and-sync adjustment is required after installation
• Removed from running engine where applicable
• In good working condition unless otherwise stated