Evinrude / Johnson / OMC Raker 394753 Stainless Steel Boat Propeller Application Guide
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Evinrude / Johnson / OMC Raker Boat Propeller:
Manufacturer: Evinrude / Johnson / OMC Prop Family: Raker Part Number: #394753 Rotation: Standard Rotation Diameter: 14-1/2” Pitch: 20”  
Prop Exhaust Types
Prop Splines
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Engine Description
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Thru-hub Exhaust
Most outboard & stern drive engines vent exhaust thru the prop hub.
You have a thru-hub exhaust if there are exhaust holes on the engine gearcase around the prop shaft. |
Thru-hub has holes around the prop hub.
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Non Thru-hub Exhaust
Non thru-hub exhaust systems are found mostly on low horsepower motors.
You have a non thru-hub exhaust if there are NO exhaust holes on the engine gearcase around the prop shaft. |
Non thru-hub is solid around the prop hub.
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Prop splines are the little teeth you see on your prop shaft and inside the prop hub. The number of splines on the shaft and inside the prop must match for the prop to fit your boat. A Pin Drive prop application has no splines. The prop is secured to a smooth prop shaft with a pin through the shaft. |
Count the teeth on your prop shaft to determine spline count.
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Propeller Basics
How To Choose A Prop Diameter Pitch Cupping Rake Ventilation Cavitation We tell you everything you need to know about props from cupping to ventilation. |
Prop Characteristics
3 Blades VS. 4 Splines Aluminum vs. Stainless Steel Performance Exhaust Left-Handed Props FAQ If you want to modify your boat's performance, consider the above before making your selection. |
Determining RPM's
Effect of pitch on RPM Test for Maximum RPM For safety and efficient performance, it is critical that your engine operates within the RPM range recommended by the manufacturer. |
