On 14/06/2015 17:17, newshound wrote:
Old laser mower with Kohler 18hp twin.

Now have sparks (new plugs) but no fuel. No obvious blockages, suspect
mechanical pump diaphragm. Spares don't seem to be readily available, is
there any obvious reason why a cheap electrical pump like this

http://www.ebay.co.uk/itm/12v-Univer...em33a123 75d0


would not work? Similar engines sometimes use a vacuum pump, might that
be a better option? (Can't immediately spot a vacuum take-off point).

For the cost, why not.

My limited experience on one not too dissimilar pump is that the
pressure was on the high side. With perhaps a slightly leaky float
valve(?) I had some over-fuelling/flooding issues.

YMMV