Genuine Tohatsu Choke Knob – Fits Mercury & Mariner 4–6HP 4-Stroke

This choke knob is a genuine Tohatsu OEM part used by Mercury and Mariner on their 4HP, 5HP, and 6HP 4-stroke outboards.
Mercury sources this component directly from Tohatsu for their small 4-stroke engines.

Mercury / Mariner Part Numbers

804646 (original part number)
8M0155131 (current superseded number)

Tohatsu OEM Part Number

3H6-67151-1

✅ Features

Genuine Tohatsu-manufactured part (OEM supplier for Mercury & Mariner 4-strokes)
Correct replacement for Mercury part 804646 and superseded 8M0155131
Smooth choke operation
Strong, durable marine-grade construction
Direct fit — no modifications needed

🔧 Fitment — Mercury & Mariner 4-Stroke Engines

Fits All 4–6HP 4-Stroke Models:

Mercury 4HP 4-Stroke (2005–2025)
Mercury 5HP 4-Stroke (2005–2025)
Mercury 6HP 4-Stroke (2005–2025)
Mariner 4HP 4-Stroke (2005–2014)
Mariner 5HP 4-Stroke (2005–2014)
Mariner 6HP 4-Stroke (2005–2014)

Model Codes commonly using this part:

Mercury: F4, F5, F6
Mariner: 4MH, 5MH, 6MH
All variations including:
Short shaft (MH)
Long shaft (MLH)
SailPower models (S / UL)

These engines are built by Tohatsu for Mercury/Mariner, which is why they share identical parts.

📦 What’s Included

1 × Choke Knob – Genuine Tohatsu OEM
Mercury equivalent part numbers: 804646 / 8M0155131

💬 Buyer Responsibility

Please confirm your model before purchase.
Message us with your model & serial number if you need help confirming fitment.