As the leading ship supplier in Midway Islands, Propeller Performance Optimization, we specialize in delivering high-quality Change Impeller Johnson 9.9 Outboard with unmatched speed and reliability. Trusted by shipowners and masters worldwide, our team ensures your vessel gets everything it needs — on time, every time.
The Change Impeller Johnson 9.9 Outboard, Marine Pumps involves replacing the worn impeller to ensure proper water circulation for cooling. This routine maintenance task requires removing the lower unit and accessing the pump housing. Always use a compatible impeller kit and follow the manufacturer's guidelines for installation.
Size: 9.9 HP outboard impeller, typically 2.5 to 3 inches in diameter
Grade: OEM or aftermarket replacement, compatible with Johnson/Evinrude models
Viscosity: Designed for use with marine-grade lubricants (SAE 90 gear oil for lower unit)
Buoyancy: N/A (non-buoyant, submerged operation in water pump housing)
Material: Nitrile rubber (NBR) or neoprene for flexibility and corrosion resistance
Blade Count: 6 to 8 vanes for optimal water flow
Operating Temperature: -20°F to 180°F (-29°C to 82°C)
Pressure Rating: 10-15 PSI (typical for marine cooling systems)
Compatibility: Fits Johnson 9.9 HP outboard models (e.g., J10R, J10RE, etc.)
Installation: Requires housing gasket and proper alignment during replacement
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