Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Plus 8 Fuel filler hose replacement

I sincerely hope so. To be honest, I would probably have bought the MERLIN hoses for their original appearance and because I still have a small doubt about the fuel-proof qualities of Silicon hoses. Hoever, one should not ignore that a fuel filler hose is not filled with fuel 24/7/365. It only gets touched by fuel during a refill and the fuel quickly evaporates.

Silicone hoses are always unwise for fuel. https://www.viperperformance.co.uk/blog/silicone-hoses-fuel-resistant/

Morgan petrol tanks should have the mandatory roll over fuel protection rather than remotely at the deck as the filler
hoses seem to often get torn from the deck filler with any impact and a roll-over drenches the occupant(s). Not fun with
sparks flying about. Easy to rectify. Many marques, with the same problem, insert one way valves into the hose, near the
tank entry. Cost negligibly and no expertise required.

There is nothing terribly wrong with the MMC filler hose materiel, except they have limited flexibility and their shape is
unhelpful. They pleat, as can be seen for the images and that makes filling the tank a pain. They also age badly, like all
rubber and few attend to that, a task required every few years. A shapeable flexible forever filler hose made from a wiser
materiel is far more prudent and cheaper, in the long and short run.

L

I think the OP is aware of that:

Samco also do a range of fuel-proof silicone hoses .... reasonably priced seeing they're one of the big makes in the business.... but get pricier the bigger the diameter.... I've used their hoses for years on the racer with good results

K

I understand the contributor who suggested silicone has already committed to that as filler hose materiel. I was offering
another opinion from experts. Why use a suspect material with a liner when there are so many other options.





If I may quote from my original source.

Other sources are clearer. https://www.autosiliconehoses.com/blog/post/are-silicone-hoses-fuel-resistant
https://www.siliconehose.com/blog/oil-fuel-and-silicone-hoses-/

In any event. I was merely filling in (pun!) the full story on silicone. Why use something of more complex manufacture required
to protect the user from its primary manufacturing materiel when there are so many more as effective and simpler options?
But I acknowledge that people will always use what they want.

Interesting to read your thoughts. Tank you.

Lorne

I think there is a world of difference between 'fuel hoses' and 'fuel filler hoses' regarding their exposure to fuel.

FUEL HOSES - I believe this description refers to small-bore flexible hoses fitted to the fuel feed and return pipework between the fuel tank and the engine. In this application, the hose contains pressurised fuel 24/7/365. I would never contemplate using a silicone hose for such an application even with a Fluoro lining to the hose.

FUEL FILLER HOSES - I assume this description refers to the usually large-bore - say 1.5" (37mm) to 2.5" (63mm) - flexible hoses used between the fuel filler cap and the fuel tank. This application means that unless the tank is filled to the very brim of the fuel cap, the inside of this hose comes into direct contact with fuel only during the few minutes it takes to refill the fuel tank. Thereafter, the fuel remaining on its interior surface runs down into the tank and any residue evaporates.

This explains why I am prepared to use silicone hoses with a Fluoro lining for my own fuel filler hose application.

Lorne, Regarding your advice of ViperPerformance, I have read their comments and recommendations but the largest nitrile fuel hose I could find on their website was just 17.5mm diameter. The only nitrile fuel filler hose listed on their website is wire reinforced which is completely unsuitable for use on my Morgan as explained in detail earlier. They don't appear to list any pre-formed fuel filler hoses.

Concerning safety, the following may be outdated information these days but back in the day when I worked in the car industry (not Morgan!), places like Sweden and California had the most stringent safety and emissions regulations. For cars exported to those markets, we had to fit charcoal canisters to the fuel tank breather along with a rollover valve to prevent fill spillage in the event of an accident. This ignores many other special devices fitted to satisfy these markets.

Dear Benigo,
I enjoy your replies and posts! They remind me of the older forums 20+ years ago where all discussions were collegiate, leading,
if we were to a lucky hard-won consensus. No one was "right" per se and we all tried to find something better than we each,
individually had. Forums today treat any reply of another view as a threat against intelligence or manhood. You are
already beyond MMC fare. We are debating for others to see if we can help them beat what we have. Why let experience and
research go to waste merely because WE fit something?

Is there?

But we all fill the filler hoses more than that on trads. No one stops at the unseen tank below. We fill the filler hose in art or fully.
Additionally, we use products to handle merely the residue of the additives of the fuel we used when storing the cars for long period.
cannot but guess that the filler hoses are also so covered. Why have any doubts? There are too many other options.

My point is why bother when there are so many alternatives that have not need for liners within a material that is strongly advised against.
Lorne, Regarding your advice of ViperPerformance, I have read their comments and recommendations but the largest nitrile fuel hose I could find on their website was just 17.5mm diameter. The only nitrile fuel filler hose listed on their website is wire reinforced which is completely unsuitable for use on my Morgan as explained in detail earlier. They don't appear to list any pre-formed fuel filler hoses.
Viper performance was merely the first cautionary warning against silicone that popped up on (try it) UK google search. Such a search
limits possibilities but I am aware that the US and UK do not like sourcing outside their countries. so for this forum I add "UK" as a search
term . (I am Canadian and caught between sources. ;)) I don't use that Viper. Never heard of it before the search.

But, in fact, I am looking to buy into buying new filler hoses myself due to this thread. Thank you.

As for nitrile, great product. There is a kaleidoscope of nitrile rubber out there but you (we) need more than merely that.
On a two second brief without the national search term,
https://www.amazon.com/Gates-23972-Gasoline-Filler-Neck/dp/B000CRFIM6
https://www.nukeperformance.com/product.html/fuel-filler-hose
Essentially, it merely getting the "component specs" right.
Shapeable because the Morgan tank design for tank outlets prohibits anything else from making sense. (you see that)
Flexible because I can unhappily assure you, any impact or even normal driving will rip it from its mooring, causing the
car ...er...to suddenly blow up (as mine and others have) or drenching you with petrol to sad effect, (never heard of that tho.)
Endurable as rubber rots and we or the next owner, are not going to be bothered checking on that AND Morgans are kept
FAR longer than the average cars laws are made for. These things are largely costless for an owner, but expensive for a
manufacturer adding 10 quid to each unit. Government regs only set a politician-acceptable minimum, after negotiation.

I simply choose things that guarantee fewer future hassles and, incidentally, greater safety. But each of us sets for ourselves,
once knowledgeable, a safety envelope we are comfortable with. I respect everyone's choices as long as they are
aware that they are making a choice. If one is looking for ultimate safety that is impossible. I don't choose anything that limits
my fun...which I guess is my standard. But I don't mind spending a few quid and minutes to avoid risk I am aware of.
BTW, I am 74 and drive a newly purchased chopper. I can't figure where to fit the seat belt.

When the Factory and I recreated my destroyed Morgan, I went with the ultimate for fuel lines (as opposed to filler hose). LOTS
of options when you choose everything on a car. That is flexible stainless steel braided PTFE, It can't rot, it can't burn, it
can't sheer, it can't melt (or at least until the rest of the car has melted first). The attachments and components attached (pumps
filters, engine, are all AN fitted).

Extreme examples, IMHO. Canada may be worse as it does not allow affidavit compliance (acceptable for decades in the US
and UK) in lieu of actual crash tests. Additionally, the US has a lot of compliancy laws, (1000s employed!) but the last time I
checked only two enforcement officers for the entire country. California is different. It has its own variants of Morgan models since
the 1970s, as does Switzerland and others. I have special archives for them and treat them differently fro stock Morgan. But most
of the States have few if any rules. And their aftermarket industry is MASSIVE. You can get ANYTHING, in any color or shiny metal.
Did you know that most (75%) of the Morgans in the States are pre-1971? Canadian fueling was UK standard.

Many new innovations like roll-overs valves can be fit in minutes. Others are downright ridiculous. As well, the US and the UK (I
do not track Swedish regs) have been changed. Small numbers car manufacturers, targeting the wealthy, are now allowed to
ignore safety regulations designed to protect drivers and the public.

Lorne