Flushing adapter use for NSF 4/5/6

[km1125]

Curious about this.

Reading through the manual, I was looking at the use of the flushing adapter and wondering if I could use this instead of trying to dip the motor in a trashcan to run it at home.

At first I was thinking that the flush adapter is only for use when the engine is not running, as the seawater pump wouldn't have any lubrication. However the manual says to run it at low speed to flush out any salt or mud. It seems like you'd need to run the engine to flush it and have the thermostat open, right?

But what about the impeller?? How does it get any lubrication so it doesn't burn up? Does enough water backfeed down to the pump to keep it wet?

 

[Sea Rider]

Can use the adapter to flush OB-ON while sitting on a stand or on transom as it's a thermostatically controlled OB. OFF won't open thermo and power head will not be convenienty water flushed. The down issue about such adapter is that will end screwing the thread located under powerhead when constantly screwing/unscrewing adapter.

Better is a big water container, insert a wate hose inside container, while flushing OB, let water overflow upper container at a slow pace to provide a proper cooling water temp while flushing.

Happy Boating

 

[pvanv]

The flushing adapter will work OK while running, but you do need a lot of water coming from the hose. It pressurizes the base casting, which is the same thing the water pump does. Extra water keeps the pump wet. If wanting a good flush, will need to run long enough for the stat to open so head passages flush as well.

 

[Sea Rider]

Regular house water pressure will work OK, the adapter end narrows compared to the entrance and exits good water pressure to flush OB conveniently along wetting impeller while it's ON.

Happy Boating

 

[nealalex]

I just did this to test my new fuel pump - you just put a hose on the adapter and you get a good pee stream, which means its all good. I also used the descaler flush, then a water flush.