While there are many ways to flush a marine engine, Volvo Penta engines have a built-in "engine flushing port", a dedicated hose on the motor that allows you to connect a common garden hose directly to your Volvo Penta's cooling system. The system is no-nonsense and straightforward. You don't need hose adaptors, flushing attachments with cutesy names like "ear muffs", parts that are "available at extra cost" or special tools. You just need a garden hose.
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Things you need
- Water spigot
- Garden hose
Connect a garden hose to a water spigot.
Look at the starboard rear side of the engine--the engine's right side, as it's mounted in the boat--and locate a hose that's clamped there, identifiable by a blue cap over its end and the "running engine flush" symbol, which resembles a water spigot above a stylised representation of a motor. Take the blue plastic cap off the end of the hose, called the "engine flushing port", to expose the flush connector.
Screw the end of the garden hose into the flush connector. Turn the water spigot on, full force.
Start the engine and allow it to idle until its temperature finally climbs into normal operating range; the thermostat won't open to allow fresh water to circulate through the engine until it reaches this temperature. Let the motor continue to run for at least ten minutes.
Shut the motor down when it's flushed out. Turn off the spigot, disconnect the garden hose from the motor and replace the blue cap on the engine flushing port.
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