Salt water

[macojoe]

the Yamaha flush is under the cowling and you don't have to run it when flushing, i love it!!

[spareparts]

its better to run the engine while flushing, it allows the thermostats to open and water to completely flush the engine. The vibration and heat from the engine tend to help as well. Flushing without running is better than not flushing, but I'd rather run them

[phatdaddy]

actually, i try to do both. i run on the muffs for 5-10 minutes and then through the port with salt away for 3-5 minutes

do you guys think the flushing additives do any good? or do they just make us think we are doing good?

[macojoe]

They can't hurt!

[reelapeelin]

Some of the early flushable motors did not flush the lower unit and water pump, so be mindful of which you have...I'm like Spare...use the flush if ya wanna, but run 'em on the muffs too for the best clean out...