Marti Auto Works Strikes Again.....Maybe

[greekz]

I purchased a new 5/16" Marti Auto Works Concours Fuel Hose kit from NPD yesterday.  Cut a short length when I reinstalled the carburetor on my '67 GT-350.  The hose leaked badly.  I checked the hose I.D. with that of a generic 5/16" I.D. hose purchased from NAPA.  The NAPA hose is visibly smaller and fits much tighter.  I am using the spring clamps, not the crimp ones.

Just wondering if anyone else has experienced any problems with these fuel hose kits.

Greek

[Bob Gaines]

I purchased a new 5/16" Marti Auto Works Concours Fuel Hose kit from NPD yesterday.  Cut a short length when I reinstalled the carburetor on my '67 GT-350.  The hose leaked badly.  I checked the hose I.D. with that of a generic 5/16" I.D. hose purchased from NAPA.  The NAPA hose is visibly smaller and fits much tighter.  I am using the spring clamps, not the crimp ones.

Just wondering if anyone else has experienced any problems with these fuel hose kits.

Greek

My first thought is that a 3/8 hose got mixed up with a 5/16 hose when it came time to apply ink stamps. It also may be that the metric equivalent size will run slightly larger in diameter which may explain things. Ordinarily a screw clamp would make the difference irrelevant however for the historic look using the spring clamps may not supply the necessary squeeze to keep them from leaking. Keep us posted.

[Royce Peterson]

Sounds like you might have a '68 kit that was mis marked? Everything in '67 should be 5/16".

I purchased a new 5/16" Marti Auto Works Concours Fuel Hose kit from NPD yesterday.  Cut a short length when I reinstalled the carburetor on my '67 GT-350.  The hose leaked badly.  I checked the hose I.D. with that of a generic 5/16" I.D. hose purchased from NAPA.  The NAPA hose is visibly smaller and fits much tighter.  I am using the spring clamps, not the crimp ones.

Just wondering if anyone else has experienced any problems with these fuel hose kits.

Greek

[greekz]

Very well could be 3/8" mismarked or metric.  Returning kit tomorrow and see if another kit is correct.  Will let you know what happens.

[The Going Thing]

As noted in previous post. The hoses on my Shelby all had to be changed that were just over a year old.  The fuel hoses from the fuel log to the carburetors were hard as a rock . The line from the apron to the pump was in the same condition and had cracked. Even the sender to main fuel line was brittle.
I might expect a little bit of hardening in the engine compartment, but it makes little sense at the tank. I had no issue with loose hoses and used both sizes.  The main line is 3/8 and the fuel log to carb are 5/16"  I used the spring clamps at the fuel line to sender and pinch clamps everywhere else as per factory.

[Bob Gaines]

As noted in previous post. The hoses on my Shelby all had to be changed that were just over a year old.  The fuel hoses from the fuel log to the carburetors were hard as a rock . The line from the apron to the pump was in the same condition and had cracked. Even the sender to main fuel line was brittle.
I might expect a little bit of hardening in the engine compartment, but it makes little sense at the tank. I had no issue with loose hoses and used both sizes.  The main line is 3/8 and the fuel log to carb are 5/16"  I used the spring clamps at the fuel line to sender and pinch clamps everywhere else as per factory.

Maybe a typo but for the 67 historic look pinch clamps from fuel line to sender and  olive drab marked spring clamps everywhere else .

[The Going Thing]

Bob:
The quads and fuel log had stainless crimps in '82 when I purchased the car. As for the fuel line I went to the 3/8" feed tank to pump down the outside of the rocker. So all clamps at the log and the main feed to the pump should be Olive pinch clamps?

[QuickSilverShelby]

So if I order a set of these and they happen to come in Metric will they fit my car perfectly since I'm in Canada? 

QSS

[FL SAAC]

We had not thought of that but after pondering on it. That is truly a profound and deep statement

So if I order a set of these and they happen to come in Metric will they fit my car perfectly since I'm in Canada? 

QSS

[Chris Thauberger]

So if I order a set of these and they happen to come in Metric will they fit my car perfectly since I'm in Canada? 

QSS

Well technically speaking they are metric so they will fit if you live anywhere except Federated States of Micronesia, Liberia, Marshall Islands, Myanmar, Palau, Samoa, and the United States.

Theses are the only countries that do not use the metric system  (sort of) 

[highland green]

i had the same experience. rummaged through some old parts and found original line and spring clamps. original much tighter,

[Bob Gaines]

Bob:
The quads and fuel log had stainless crimps in '82 when I purchased the car. As for the fuel line I went to the 3/8" feed tank to pump down the outside of the rocker. So all clamps at the log and the main feed to the pump should be Olive pinch clamps?

5/16 fuel log hose used the crimp clamps. Stainless is typically too brittle and expensive to be used in crimp clamps so they are typically a bright zinc plated steel . Short hose between sender and fuel line used crimp clamps.  Just the fuel line past the sender to the pump used the spring clamps. The olive identification color is for 5/16. If using 3/8 line on a 67 but wanted the historic look you could paint the silver color 3/8 spring clamps olive drab so as to not draw attention to the larger 68 model line on a 67.That is if you cared to disguise it.

[69mach351w]

So if I order a set of these and they happen to come in Metric will they fit my car perfectly since I'm in Canada? 

QSS

Well technically speaking they are metric so they will fit if you live anywhere except Federated States of Micronesia, Liberia, Marshall Islands, Myanmar, Palau, Samoa, and the United States.

Theses are the only countries that do not use the metric system  (sort of) 

You missed Bangledesh 

[Bob Gaines]

So others reading can understand better what the discussion is about,  over the years the Marti hoses and cables have transitioned to the metric size. In the cables it means that the diameter of the cable is larger. In some cases it is easier to distinguish the larger metric then others. For example the positive battery cables are pretty easy to distinguish the larger metric form the original diameter 65-70. Easy for me because I have a number of original that I am used to comparing to. Sometimes ebay sellers try to pass off the metric cables as original. I haven't had any experience yet of problems associated with larger diameter fuel line ,heater or radiator hoses but I image it is coming. 

[Chris Thauberger]

So if I order a set of these and they happen to come in Metric will they fit my car perfectly since I'm in Canada? 

QSS

Well technically speaking they are metric so they will fit if you live anywhere except Federated States of Micronesia, Liberia, Marshall Islands, Myanmar, Palau, Samoa, and the United States.

Theses are the only countries that do not use the metric system  (sort of) 

You missed Bangledesh 

Bangladesh Adopted the metric system July 1, 1982