Mercury 2.5-3.5HP FourStroke Outboard Storage Guide

About this manual

This document outlines the necessary procedures to protect a Mercury outboard motor from rust, corrosion, and freezing damage during storage periods of two months or longer. Key steps include managing the fuel system to prevent varnish and gum formation, and lubricating internal components.

What's inside

• Storage Preparation
• Fuel System
• Protecting External Outboard Components
• Protecting Internal Engine Components
• Gearcase
• Positioning Outboard For Storage

Frequently asked questions

How long must an outboard be stored to require these procedures?

These procedures are required for out of season storage or prolonged storage lasting two months or longer.

How long should the engine run after adding fuel stabilizer?

You must run the engine for five minutes to allow the treated fuel to reach the carburetor.

What happens if an outboard is stored tilted up in freezing temperatures?

Trapped cooling water or rain water could freeze and cause damage to the outboard.