Marine fuel line grades

[holy mackerel]

I need to replace the fuel lines and primer bulbs on both my outboards. I have found type A1, A2, and type B. Does anyone know the difference? The lines will be exposed to sun and possibly ethanol. Also, Is one primer bulb any better than the next?

Thanks,

[lost a lure]

Check this out.

 

http://www.uscgboating.org/regulations/boatbuilder_s_handbook/fuel_standards_partl.aspx

[Sk8man]

Also of interest is the type of hose clamps acceptable mentioned further in the article....