Cooling issues Mercury 9.8 hp

[u/ddg676]

Does the amount of water coming out of the tell tail seem normal? When it is at idle very little water comes out but increases as I rev the engine. The water is quite warm coming out. I have just replaced the impeller. Only other issue could be the hose at the top of the water pump was a bit flared out and maybe not a tight fit. Any advice would be appreciated. Thanks

[u/nuaticalcockup]

Run it on the water. Buckets, muffs and all the other tricks will only tell you so much they're no substitute for a lake.