Volvo make a flushing kit designed for in boards that uses something called Neutra-Salt concentrate , using it with an out board you would have to work out some way of getting it into the system
They do some stuff called salt terminator which includes an attachment for your hose. It costs about £20. I've used it a few times now an touch wood - have had no problems with the cooling system clogging up. The company do mail order boat accessories and water skis, wakeboards and towable toys. They seemed pretty quick whenever I've ordered off them.
When I flush my engine I use one of those 205ltr blue plastic drums with the top cut off and filled with water, I would think you could put your additive in one of those with the water, if I am not going home and not able to flush my engine that day I use a 25ltr drum mount it up on the A frame and with a hose connected to some muffs syphon it down to the muffs, when the waters running start the engine, same idea put the additive in the drum.
You would have thought that flushing an outbooard with fresh water would rid it of the salt. So after a week zooming up and down the Thames at Lechlade (and getting caught ) I took the thermostats out of the Yam 115 as part of a service. Oh dear still covered in salt crystals despite a weeks use in fresh water.
However I still believe in flushing outboards every time to get out salt water before it crystalises and any silt.
looks like boatworld are updating their website as it seems to be down every now and again. I have checked the links and they do work...................................sometimes
) I took the thermostats out of the Yam 115 as part of a service. Oh dear still covered in salt crystals despite a weeks use in fresh water.
