Re: drain plugs
hello i would like to know if someone could tell me what the plug below the pee hole is it says flush what does this flush it is an mercury 9.8 serial#3090625 if someone could help that would be great thank you
It is to flush water through the cooling system- generally after use in salt water. But also probably a good idea after use in muddy or silty water to clear any build up.
With these Merc 9.8's, you should not use that flush fitting to run the engine on the hose, unfortunately. The way the plumbing is set up, water running into that hole does not adequately flood the water pump, therefore if you try to run the engine with only that as a source of water, it might damage the rubber water pump impeller.
The fitting is pretty common. I don't know what it's called, but you can get water hose adapters for that thread. If nothing else, ask in a boat shop, but you can get the proper fitting at most hardware or home stores.
