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Dec 14, 2013 9:02 pm
Dec 14, 2013 9:02 pm
Subject: Re: LG45 Fuel pump
HI David
We’re another who had to replace the fuel pump on our LG45. The replacement SU pump I bought was sold as a “SU double electronic AZX1400”. Also cast into its side is “AUB 650”. It looked almost identical to the old one, and fitted straight in. However it occasionally had trouble priming and its output pressure caused several leaks at the SU carburettors.
And then a friend produced copies of old SU pump service leaflets. I began to suspect that the new pump was a “pusher” model and not a “sucker” model, so tried fitting it in the boot just above the petrol tank, plus a pressure regulator adjusted to about 2 psi in the fuel line to the carburettors.
That seemed to fix both the priming problem and too much pressure arriving at the carburettors, and we’ve now done about 7000 miles with no more fuel supply problems.
I think if I did it all again I’d make sure that the pump I was being sold was a sucker model and not a pusher model.
Hope there is something in all that which is helpful,
Bill Inglis
HI David
We’re another who had to replace the fuel pump on our LG45. The replacement SU pump I bought was sold as a “SU double electronic AZX1400”. Also cast into its side is “AUB 650”. It looked almost identical to the old one, and fitted straight in. However it occasionally had trouble priming and its output pressure caused several leaks at the SU carburettors.
And then a friend produced copies of old SU pump service leaflets. I began to suspect that the new pump was a “pusher” model and not a “sucker” model, so tried fitting it in the boot just above the petrol tank, plus a pressure regulator adjusted to about 2 psi in the fuel line to the carburettors.
That seemed to fix both the priming problem and too much pressure arriving at the carburettors, and we’ve now done about 7000 miles with no more fuel supply problems.
I think if I did it all again I’d make sure that the pump I was being sold was a sucker model and not a pusher model.
Hope there is something in all that which is helpful,
Bill Inglis