Thanks Joe carroll, the distance between the centre of each hole is 40 mm [Linked Image]
The number on the coil is 4137/1304/A/AD/4137/FS/and the last three digits I think are 512 and the numbers on the inside of the plastic cowl are 4137 084 0902. Idid pull the trigger apart and found that it had a switch in it ,so I cleaned it out and tomorrow will try it again. Also tomrw I will take one of the wires off the coil if still have problem. I will get back to you in the morning thanks again,Rob

Last edited by Joe Carroll; 21/10/13 05:09 AM.