Well, first of all... you should have bought a three rabbit pump, they are much better than those old vole ones :)
Keep the pump and diesel lines above, say, 5C and below 50C, preferably below 40C. Too cold and the diesel will gel, too hot and the pump will probably fail at some point.
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"I beseech you in the bowels of Christ think it possible you may be mistaken"
Oliver Cromwell, 3rd August 1650 - in a letter to the General Assembly of the Kirk of Scotland
