gday roebuck.
1st .remove plug and put a screwdriver down hole. rotate engine clockwise till it reaches top dead centre. which is pushing the screwdriver its furthest position out of the plug hole.
2nd .rotate engine backwards till the screwdriver drops down 3mm. this will put the piston at 3mm below top dead centre. which is the correct setting for setting timing.
3rd . note that for timing to be correct the points should be just starting to open at the 3mm below top dead centre mark.
4th . the points gap max has to be .685mm maximum setting.highest point on the cam.
5th. get all these things correct and you will have perfect timing.
note: if you have done all these things and still weak spark.
try pulling off plate and buffing all parts shiny clean.
polish points to clean off any corrosion.
clean all terminals.
wipe all traces of dust and grease from everything.
this should work. it has worked many many times for me.
if still weak spark then your coil is bad. (not really likely though).
then once you done all these things and still no luck i will tell you how to test your coil. good luck bazz
ps: another issue with spark could be the terminal on the end of your plug lead. a lot of old mowers tips get full of crud and lose there ability to conduct through the grime on them
Last edited by gizmo; 16/06/13 04:33 PM.
