I agree with Jack. On the F15, I put one in-line, using the holes in the battery step designed for an Autopulse pump, with a switch in the appropriate place in the dash. Only used it when needed, such as pre-start priming, re-start on a hot day or when the motor 'stuttered' on a hot day, usually labouring under load. Quick flick of the switch: problem solved.
The modern pump used the same mounting holes as the original Autopulse, but had a higher delivery pressure, so a pressure reducer/regulator had to be installed just before the carbie. It was a device with a dial for the required pressure. System worked very well.
Mike
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