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imsnookyrd

Fuel hose

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The rating system exclusively for marine hose is known as SAE J1527 and it provides for grades as follows:

A1--fuel feed hose; has a fire resistant cover; is designed to have fuel in the hose at all times. Least permeable with highest fire resistance.

A2--fuel vent hose; has a fire resistant cover; is not designed to have fuel in the hose at all times.

B1--fuel feed hose; without fire resistant cover; is designed to have fuel in the hose at all times; intended for non-enclosed spaces. Diesel engines or above deck outboard gasoline applications.

B2--fuel vent hose; without fire resistant cover; is not designed to have fuel in the hose at all times. Diesel vent lines.

If you are building a boat or replacing a deteriorated fuel system, buying 1 coil of A1 hose is often the most useful and safest way to go with less leftover hose in the end.

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I think marine fuel hose is Coast Guard approved. Now what does that mean, I don't know. Maybe it means it designed to withstand more chaffing or it has thicker wall.....

EDIT: Troy must of posted while I was typing, guess his response sums it up.

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Thanks Troy, that was what I was thinking but wasn't sure. Will go with the what you suggested, I'm just doing some winter time work on the old Pathy, re-wired everything and re-plumbed and changed out the plastic thru hulls now moving on to the fuel system. Thanks again you are always a wealth of information.

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The rating system exclusively for marine hose is known as SAE J1527 and it provides for grades as follows:

A1--fuel feed hose; has a fire resistant cover; is designed to have fuel in the hose at all times. Least permeable with highest fire resistance.

A2--fuel vent hose; has a fire resistant cover; is not designed to have fuel in the hose at all times.

B1--fuel feed hose; without fire resistant cover; is designed to have fuel in the hose at all times; intended for non-enclosed spaces. Diesel engines or above deck outboard gasoline applications.

B2--fuel vent hose; without fire resistant cover; is not designed to have fuel in the hose at all times. Diesel vent lines.

If you are building a boat or replacing a deteriorated fuel system, buying 1 coil of A1 hose is often the most useful and safest way to go with less leftover hose in the end.

Check your pricing in the region....

I am doing a rewire and fuel line system....

My local Yamiedog - Boat Center - $2.83 / ft

Boat Owners Warehouse - $3.23

West Marine - $5.99 / ft

I needed it on Sunday and BOW was closed but, WM met the price.....

Yes, I bought A1.

dc

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BELIEVE it on the A1. My A2 delaminated on the inside of the hose after only three years and NO ethanol. It was where the fuel hose bowed in the bilge and gas settled by the bulb. It' almost cost me dearly. Whole boat is A1 now.

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A2--fuel vent hose; has a fire resistant cover; is not designed to have fuel in the hose at all times.

This is for you guys that at times smell gas fumes in your hatches.

I have found on a few boats that I have worked on that the vent hose would have a loop or low spot in the hose. This would allow the vent line to have some fuel laying in the bottom of it especially right after filling a tank. The nature of the A-2 to be more permeable would allow fumes to get into the fuel tank surrounding compartments.

Most likely not enough vapor to be a real hazard but just noticeable enough to drive me nuts looking for the source.

Anytime I mess with a fuel system all lines get changed to A-1.

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