Braided fuel lines

colind3782

colind3782

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I'm in the process of renewing the fuel supply from the tank to the injector pump.

From the primary CAV filter, the fuel lines are braided to the lift pump and then to the secondary spin on filter.

Do these need to be braided or can I use standard ISO 7840 "rubber" hose? What about to the injector pump from the secondary filter?

The reason I ask is that it will be a pain to get braided, crimped hoses made up here in Spain and, if I can use rubber hose, it will make it easier to change in future.
 
I guess it will depend on the engine and the installation. On my 1GM10, the pipe from the tank to the primary filter is cupro-nickel. Those from the primary filter to the lift pump and from the lift pump to the secondary filter are fibre reinforced rubber with jubilee clips. From the secondary filter to the HP fuel pump and from the pump to the injector are steel. until the fuel gets to the lift pump inlet, it is gravity fed. From the lift pump to the injector pump, it is low pressure but from the injector pump to the injector it is High Pressure. High enough to be hazardous. Excess fuel from the injector is fed back to the top of the fuel tank through fibre reinforced rubber hose.
 
Topcat47 said:
I guess it will depend on the engine and the installation. On my 1GM10, the pipe from the tank to the primary filter is cupro-nickel. Those from the primary filter to the lift pump and from the lift pump to the secondary filter are fibre reinforced rubber with jubilee clips. From the secondary filter to the HP fuel pump and from the pump to the injector are steel. until the fuel gets to the lift pump inlet, it is gravity fed. From the lift pump to the injector pump, it is low pressure but from the injector pump to the injector it is High Pressure. High enough to be hazardous. Excess fuel from the injector is fed back to the top of the fuel tank through fibre reinforced rubber hose.
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It's a Sole Mini 34. I get that but this is all pre-injector pump. I understand that the line from the lift pump to the secondary filter is at higher that gravity pressure and I'm not planning to use any low pressure line from the injector pump and I'll probably use the Sole part number from the secondary filter to the injector pump. It's from the primary filter to the lift pump and the lift pump to the secondary filter that I'm wondering about.
 
The problem with braided hose is you can't inspect it properly therefore know if it is breaking up. I have used it once on a rib with the fuel line rather exposed to the elements and peoples feet, but won't use it on a yacht.

The polo mints on the ends are banjo fittings.

Pete
 
Pete7 said:
The problem with braided hose is you can't inspect it properly therefore know if it is breaking up. I have used it once on a rib with the fuel line rather exposed to the elements and peoples feet, but won't use it on a yacht.

The polo mints on the ends are banjo fittings.

Pete
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I know the banjos, it's the other ends I was asking about.
 
Unless the boat is coded you just need to use an appropriate grade flexible hose. If you were in Plymouth I could recommend a good place to get them made up but in Spain..... There will be a supplier of flexible hoses somewhere who will make new to your pattern so I guess it will be worth asking around in the commercial vehicle or farming businesses as to who they use.

Yoda
 
yoda said:
Unless the boat is coded you just need to use an appropriate grade flexible hose. If you were in Plymouth I could recommend a good place to get them made up but in Spain..... There will be a supplier of flexible hoses somewhere who will make new to your pattern so I guess it will be worth asking around in the commercial vehicle or farming businesses as to who they use.

Yoda
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Thanks. I'm going back to the UK for work today so I'm taking them with me to get new ones made up if they have to be braided and crimped. If not, I'll get new banjos and the fittings on the other end, once I've worked out what they're called and make them up with normal ISO 7840 "rubber" hose.
 
Braiding is to protect from some impact and abrasion, I would sincerely hope that those were not an issue. I refitted a 15m yacht to pass coding for charter work and there was no need for braid.

The 90 ends are simply called swept 90. You may be able to specify the radius of the sweep.
 
colind3782 said:
I'm in the process of renewing the fuel supply from the tank to the injector pump.

From the primary CAV filter, the fuel lines are braided to the lift pump and then to the secondary spin on filter.

Do these need to be braided or can I use standard ISO 7840 "rubber" hose? What about to the injector pump from the secondary filter?

The reason I ask is that it will be a pain to get braided, crimped hoses made up here in Spain and, if I can use rubber hose, it will make it easier to change in future.
Click to expand...

No you do not need to use braided hose as long as you protect them from chaff, which is what the braiding is for. When i did mine i very carefully cut off the crimps and reused the end fittings as they were still in good condition.

Www.solocoastalsailing.co.uk
 
Plum said:
No you do not need to use braided hose as long as you protect them from chaff, which is what the braiding is for. When i did mine i very carefully cut off the crimps and reused the end fittings as they were still in good condition.

Www.solocoastalsailing.co.uk
Click to expand...

Thanks for that. I now have to decide whether to make them up myself with rubber hose or get braided hoses made up as they'll be more shiny! ��
 
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