Mercury/Tohatsu Outboard Water Pump Impeller Change on a 4HP/5HP/6HP 4-Stroke

Quick video showing how to change the water impeller in a Mercury 6HP outboard (same for Mercury/Tohatsu 4hp/5hp/6hp).

Always refer to your own owner’s and service manual!

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Here is the video where I did EVERY MAINTENANCE item in the manual plus a carb removal and cleaning:

   • EVERY MAINTENANCE ITEM: Mercury/Tohat...  

Safety First! Make sure gas valve is closed and all gas is drained from lines in a safe manner away from all heat sources (garage heater and incandescent bulbs). Ideally entire system is drained or ran dry.

Make sure motor is secure and cannot tip over

Inspect all gas lines and carb for gas leaks after reinstalling

If you have an electric start, unhook it before working

Motor and oil gets hot. Make sure motor is cool before any maintenance

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All maintenance items are the same for Mercury 4HP, 5HP and 6HP 4-stroke outboards and Tohatsu 4HP, 5HP and 6HP 4-stroke outboards.

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Disclaimer: Use at your own risk. SAFETY FIRST! Always read your own owner's manual and service manual and understand all safety items for your specific boat and motor. I am not an expert mechanic. All of the information I share is for entertainment purposes only. Consult your boat and motor's manufacturer, owner's manual and service manual for expert advice. Boating and repairing/maintaining a boat motor can be dangerous. Please make sure you fully understand all risks involved so you do not get injured or worse. Once again, all content on this channel is for entertainment only. Please only attempt any of the things in these videos unless you have adequate skill, have fully read the owner's manual and service manual, and even then continue at your own discretion and risk. I am not responsible for your boat, motor, and am not responsible for keeping you safe.