Key facts
- Brand
- Mercury
- Model
- 25 - 30HP FourStrokes
- Category
- Other
- Industry
- Appliances
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-10
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25 - 30HP FourStrokes STORAGE
This document outlines the necessary procedures to prepare an outboard motor for seasonal or prolonged storage. The primary goals are to protect the engine from rust, corrosion, and damage caused by freezing water.
Key steps include treating the fuel system with gasoline stabilizer to prevent varnish formation, lubricating internal components like cylinders and gearcases, and applying corrosion guards to external metal surfaces. Proper positioning of the outboard in an upright vertical position is also emphasized to ensure drainage.
All Mercury 25 - 30HP FourStrokes documents by type
Disassembly, diagnostics and part numbers, for repair.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
When should engine oil be changed?
Engine oil should be changed every 100 hours of use or once yearly, whichever occurs first.
From: Mercury 25-30HP FourStroke Outboard Maintenance Manual
How often should spark plugs be replaced?
Spark plugs should be replaced at the first 100 hours or first year, and then inspected every 100 hours or once yearly.
From: Mercury 25-30HP FourStroke Outboard Maintenance Manual
What should be done if the gasoline contains alcohol?
It is advisable to drain as much of the remaining gasoline as possible from the fuel tank, remote fuel line, and engine fuel system.
How long should the engine run after adding stabilizer?
The engine should be run for ten minutes while in water or connected to a flushing attachment.