Different riser temperature

[masfel]

Hello everybody!
I have a Merc 502 on my 26 and I realised that the two risers have different temperature.
The part circuit are new but the right one is quite hot (I cant't leave the hand more than 5 seconds), the left one is close to be cold.
Water flush out the exaust seems good from both sides.
Of course right side has a little bit more water steam...
Is this normal???
Thank you very much

[CptBill]

That's why most people replace them in pairs(both sides at the same time) to keep the flow rates the same. The side that is older probable has some corrosion and rust making it not flow as well, Here in Florida if you run in salt water it's recommended to replace manifolds and risers every 3-5 years just so you don't encounter a problem that could due terminal damage to your engine