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Q & A: How many amps does a SU fuel pump pull

Monday January 02nd, 2006
Q & A, MGA, MGB, MGC, MG T-Type, Midget
I installed an inline fuse on the white wire to the fuel pump on my 1980 MGB, I need to know what size fuse to install. Thanks for your time and help.

Richard O'Connor
King, NC
Richard!

I just measured the coil in the fuel pump to find it has 3 ohms. So, when the points close and full current runs through the coil, it's drawing just over 4 amps (3ohms x 4amps = 12 volts). I would fit a 5 amp fuse here -... read more