Gasoline engines come with one of the following 5 sizes of cooling systems. In order to determine what size cooling system you have you must.....
I/O (Stern Drive) Engines
Click on your size cooling system to see products and order.3/4" Cooling systems1-1/4" Cooling systems
1" Cooling System
1" Cooling System Single Valve Left and Right
1 1/4" Single Valve Left and Right
1-1/4" I/O Cooling Systems
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