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Author Topic:   Fuel Hose B2 or not 2B
george nagy posted 05-03-2002 04:15 PM ET (US)   Profile for george nagy   Send Email to george nagy  
I bought some b2 fuel hose for both my gas line and my oil line. Should I use this or A1 instead?
Dick posted 05-03-2002 09:03 PM ET (US)     Profile for Dick  Send Email to Dick     

Type B hose is all that is required for outboards. Type A is not only a lot more expensive but is a larger outside diameter and not as bendable as type B.

jimh posted 05-04-2002 12:04 AM ET (US)     Profile for jimh  Send Email to jimh     
Last spring I renovated the fuel system on my boat. All the lines I removed were grade A1.

I ended up using grade A1 hose from the tank to the filters. This got the lines above deck and close to the motor well.

From the filters to the engine I used grade B2, as this was more flexible and cheaper. I also figured I could replace it easily if it proved to have poor life.

In researching about the legally required grade of lines I don't recall finding much about outboards. I believe I got to a dead end when I needed the ABYC recommendations. They are not on-line. You have to buy them for considerable money (like $200). That put and end to my curiousity, and I used the hoses I described above.

If you read the USCG regs, they seem to point to A1 or A2 hose for fuel lines. I'll have to go back and look at this. I was going to put an article together on this topic, but I ran into another wall when my primer bulbs were such a problem. (This got solved this spring with the hint to point the arrow upward when priming.)

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