Well I asked the question a while back if anyone knew anything about the BLUE fuel line (ethanol resistant) course no one really know of it.
I got some today so will let everyone know about it. It may be common knowledge but the gray merc hose with orange or red writing on it is NO GOOD. Luckily all the main black hose from the pulse pump to the carbs and all the carb hoses are fine--but I had the merc with orange writing from the pulse pump to the filter (under the cowl) I split it and the liner was separated from the hose--the liner wasn't coming apart yet but it was close. I am changing the fuel lines from the tanks to the motor and from the motor connection to the filter--hopefully the blue hose is as good as the merc hose with blue writing--we will see.