does the primer diaphram unscrew or unclip to replace it.,

rob lipsham, October 2010

Thank you phil, I will give it a try first and if I struggle will have to put it i with engineers

rob, October 2010

Assuming you mean the primer BULB, the ring that surrounds it has 2 lugs at 9 and 3 o'clock. They have to be compressed inwards. The ring then comes out, followed by the bulb.

It's fiddly - but possible - using a pair or screwdrivers. Briggs sell a special tool that does it in about 5 seconds.

phil_saunders(a)bigfoot.com

Phil Saunders, October 2010