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MG Midget and Sprite Technical - Routing fuel line?

Hi,

Originally my fuel line runs under the car on the same side as the exhaust then up in front of the manifold where the mechanical pump used to be and then to the carb.

Isn't running fuel close to something as hot as the manifold dangerous?

Now with an electrical pump in the back should i run the line on the engines coolside and from there shortest way possible to the carb?

What have you guys done?

Engine is 1275 with stainless steel manifold and weber 45 if that should be of any significance.

Thanks
Alex
Alexander Sorby Wigstrom

on my 1275 the line runs along the support channel on the opposite side to the exhaust. It then does a right angle just in front of the gearbox mounting across to the passenger side inner wing. Doesn't get nearer than 5 inches to the exhaust
graeme jackson

I ran mine through the tunnel. You can find a wide route clear of the manifold, but I can't remember exactly what it was.

The only picture I have seems to be just before the route was chosen.


Nick and Cherry Scoop

X2 Graeme

Hmmm... you have an A series engine that had a mechanical fuel pump ?

Datsun A-15 perhaps ??? Very similar.

Prop
Prop and the Blackhole Midget

I wouldn't say it would be dangerous to be a few inches away (as long as it's metal pipe!) but you could get vaporisation problems. I think Graemes description is the standard routing for the 1275.

Prop most A series engines ran a mechanical pump, it was only later A series Spridgets that had electric pumps. Even 1980's cars had mechanical pumps and I bet it was only in the early 90's that Mini's went electric when they went onto injection. Not sure on that though.

Does anyone know why they used electric pumps on the later Spridgets and not on the other A series cars?
john payne

After it crosses the front of the tunnel, it should be clipped to the LH chassis rail and P-clipped to one of the engine mount tower bolts.
Dave O'Neill 2

John,

My 1962 Mini had an electric pump mounted on the rear subframe [so I suspect they did from the start in 1959]. Due to the location of the pump, failure due to water ingress was a common problem so I fitted a rubber shield made from a length of inner tube. Prior to the Mini, I had a 803cc A series Morris Minor which had an electric pump mounted on the front bulkhead.
Doug Plumb

Doug, didn't realise that, to be honest I'm going off my experience with later cars from the 80's and more specifically Metros. Funny how they swapped between both systems, especially as the engine block/camshaft were set up for mechanical. Of all the engines the transverse ones should have had an electric pump cos getting to the mechanical one was always a bit of a pig on the Metro/Mini!

My Mk1 had both mechanical AND electric. The mechanical one pumped as normal then went through an SU electric pump next to the wiper motor then onto the carbs. The electric pump wasn't used normaly, just switched on if the mechanical one failed. I don't know the theory of how it fed through either pump when one or the other wasn't working but it seemed to work fine. It also had a spare electric pump next to the spare! Do you think the PO was a bit paranoid?!
john payne

Austin 11/1300s also had electric pumps, as did all Morris Minors.
Dave O'Neill 2

the bigger Minors the Wolseley 1500 and Riley 1.5 from the late 50s and early 60s also had electric pumps, I know as a mate, and then later I, had a Wolseley in the mid-70s, mine was my first car
Nigel Atkins

X3 same as prop and Graeme!

Steven Devine

This thread was discussed between 27/02/2015 and 28/02/2015

MG Midget and Sprite Technical index

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