1. Servicing the Cooling System
By Jeff Wilbanks
Fannin Co. High School
and Stan Mitchell
Oconee Co. High School
June 2002
Georgia Agriculture Education Curriculum Office
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2. Small Engines are used extensively in Horticulture.
Mowers
Pumps
Trimmers
Generators
Blowers
Pressure Washers
Information came from B&S repair manual. This is text copied from ms word and placed into a power point presentation.
These notes are to help.
Let’s finish and go to lunch.
This is text copied from ms word and placed into a power point presentation.

3. A Routine is Important!
At each fueling you would check things like oil levels just like you do your vehicle.
Daily you should perform some maintenance, like adjusting belts or adding trimmer string.
Weekly you should perform some maintenance, like sharpening blades.

4. Servicing the Cooling System
Done every 50 hours of operation or every 3 to 4 months.
Involves removing the external parts of the engine.
One of the most neglected services on a small engine.
A clean cooling system is important to long engine life.

5. To get started… Use a screwdriver to remove starter cover screws.

6. Remove the starter cover.

7. Remove fuel tank screws with 5/16 inch nutdriver.

8. Use needlenose pliers to slide fuel line clamp along line.1 2

9. Before removing the fuel tank, drain the fuel or plug the line.

10. Remove the fuel tank.

11. Remove the shroud bolts using a 3/8 inch drive socket or wrench.

12. Remove the shroud.

13. Now you have a stripped engine block ready for service.
Starter shroud
Fuel tank
Any other sheet metal parts.

14. The fins on the engine are used for cooling.

15. The fins on the flywheel act as a fan.

16. All these parts work together to cool the engine.
Cooling fins
Flywheel fins

17. To service the cooling system.
Clean the fins using air, a brush, or a screwdriver to scrape away dirt build-up.
Kerosene or mineral spirits can be used to clean the engine.
Safety glasses should be worn while working.

18. Summary
The cooling system should be cleaned on a schedule of every 50 hours or every 3 to 4 months.
The cooling system is vital to the longlife of a small engine.
Most small engines operate in a dirty environment, and the cooling system is one of most ignored systems on the engine.

19. You will need to redo this presentation to fit your area.
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Instructions
You will need to redo this presentation to fit your area.