911T MFI fuel hoses

[ctnbop]

Hello there,

I'm new to this forum and have a question about changing the fuel hoses on a 1973 911T with MFI. I'll be helping someone with his car which is not local and so I need to complete the job in one day.

I'm not entirely familiar with 911s so my question is: can someone advise on how many meters of fuel hose, and of which size(s), I should order to complete the job?

Many thanks in advance.

[Rot 911]

Not sure right off of the sizes or length, but be very careful when removing or installing new hoses on the cold start injectors. They are made out of plastic and are unobtanium.

[356RS]

For the main MFI pump fuel lines (not the small cold start lines) you will need a High Pressure Fuel Line in the size of 7mm ID X 13mm OD. Porsche used the Cohline & Contitech brands and Pelican has it with the part # N-020-281-1-M5021. You can also use other brands but they should be rated for over 50 PSI. Napa and others sell good 5/16 ID fuel line if you can't find the correct 7mm hose. Replace all the fuel line clamps too. For a 73 I would think 4 to 5 meters would do the job with some left over. Also a good time to replace the fuel filter and check the fuel screen in the tank if you have time.

[Grady Clay]

ctnbop,

Here is a search result list.
The Search Function is your friend.

Pelican Parts Technical BBS - Search Results

This thread:
Braided Fuel Hose for a 72T MFI
Probably has the sizes and lengths you need.

I recommend you read all the threads on this list and follow links.


It would be unusual for you to be able to anticipate everything you will need.
Even the most skilled will take more than necessary and still find something else is necessary.
After almost 40 years of service and some PO and unskilled mechanical work, there is the likelihood of surprises.
Not being familiar with 911s will make it difficult to recognize a problem.

Needless to say, working with gasoline and the fuel system you must exercise extreme care.
Even the slightest fuel ‘seep’ is unacceptable.

Please don’t burn down your friend’s 911.

Best,
Grady

[ctnbop]

Thanks everyone for your quick replies. My search didn't turn up that thread but that's exactly what I've been looking for. I've worked on cars for years, just not 911s. I'll be ordering the metric hose and clamps from Pelican.

Thanks again.

Canh

[356RS]

ctnbop, I should have asked if you are replacing all the fuel lines in the car, front to rear. Obviously this would require a few different sizes and longer lengths than my post. Grady's suggested links are a wealth of very good information to read before you start on your friends car.

[tobluforu]

does Pelican or Porsche sell these fuel lines