308 Spark plug issues

[Robohan]

Gday there,

my vl 308 was running a bit rough so i checked the spark plugs and noticed one had a cracked insulator on the part that sticks out of the engine...

So i put some new spark plugs in and when for a spin...this time it ran worse than before...

I went back again and checked the spark plugs and noticed one of my new ones had done the same thing?!?

Any advice on whats happening and how I can fix this problem would be much appreciated!

[VR028]

was it the same cylinder that broke the insulator or a different one?

[strgas]

check your spark plug socket for the rubber inside and be careful how you install the plugs too much side pressure will cause the plug to break , watch out when working around the alternator that you dont spark against the power lead try using a spanner on the plug socket to increase clearance and chane of breaking the plug

[nasty1]

Technicaly it's a304 lol. Technicaly you should disconnect the battery terminals..........did you drop that plug? Sometimes you can buy dud plugs also if you drop it ditch it and buy a new one