86070 Mercury Throttle Spool | Genuine Used Part

🔧 Product Description

Genuine Mercury Portable-Outboard Throttle Spool - Part Number: 86070

A genuine Mercury throttle spool used in the steering-handle throttle-control assembly of selected 7.5HP and 9.8HP two-stroke outboards.

The spool guides and winds the internal throttle cable so rotation of the tiller-grip throttle is converted into movement of the engine throttle linkage.

⚙️ Key Features

• Genuine Mercury throttle-control spool
• Correct part number 86070
• Installed in the steering-handle assembly
• Guides the internal throttle cable
• Used on selected 7.5HP and 9.8HP portable outboards
• Discontinued OEM component

🚤 Compatibility

Documented on selected

• Mercury 7.5HP twin-cylinder two-strokes
• Mercury 9.8HP / Merc 110 twin-cylinder two-strokes
• Mercury 7.5HP serial 8057545 and above
• Mercury 9.8HP serial 9217756 and above
• Commonly associated with approximately 1979-1985 portable engines
• Short- and long-shaft tiller models using the matching steering handle
• Engine Type: Mercury twin-cylinder carburetted two-stroke outboard
• HP Range: 7.5HP - 9.8HP

🔌 Function

The spool converts rotation of the throttle grip into linear movement of the internal cable. The cable then operates the carburettor and ignition-advance linkage.

⚠️ Common Signs of Failure

• Throttle grip turns without moving the linkage
• Cable jumps out of the spool groove
• Spool is cracked or worn
• Throttle movement is stiff or uneven
• Engine does not return to idle

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 86070 original documented throttle-spool reference
• Part is no longer available from Mercury

OEM / Related Numbers

• 86070
• 66374A2 related throttle-control lever assembly
• 17-76207 related roll pin
• 86210 related throttle cable
• 86212 overspeed-limiter follower
• 24-39042 neutral-speed-limiter spring
• 12-29245 related washer

Aftermarket / Verified Equivalents

• Specialist used or new-old-stock 86070 throttle spool
• Used complete Mercury tiller throttle-control assembly
• No verified direct aftermarket spool

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated
• Inspect the internal cable and roll pin before installation