254xp

[gobbypunk]

Hi everyone ,I was talking with a mate yesterday who has a 254xp and he says it has a weak spark he has a new plug and lead I am not that good at fixing saws so said I would ask on hear what people thought might be wrong with it so any ideas why it has a weak spark

Thanks Mark

[adw]

Depends what your interpretation of weak spark is, they work off speed of rotation so you may not get a big blue spark like a points and condenser system, I assume it does not start?  normally if there is something of a spark they will go, if it’s not starting it could well be something else. 
0.3mm air gap and 0.5mm plug gap.

[spudulike]

Try sticking your tongue on the plug, pull it over and tell me that spark is weak

DO NOT DO THIS - I am joking!!!!

Get an old plug - bend the electrode away from the central electrode - 45 - 60 degrees and try it again. If it sparks then there is probably very little wrong with it. Check the coil to flywheel gap - That is the 0.3mm air gap ADW mentioned but you can take it down a little to help if the magnets are a bit shot (A4 paper is one method), done this a few time on old saws.  

It probably has other issues you can close the plug gap up a little to half what it should and this can help diagnose issues but it is much more likely to be a compression or carb issue!

These saws are well worth doing, 54cc and very light and powerful!

[gobbypunk]

Cool Thanks Spud I will let my mate know