hello okay right in this video we're going to be checking and setting the air gap on the armature or coil as you may call it before undertaking any work on your mower make sure the first thing you do is just remove the spark plug lead this will stop anything from sparking while you're working on it so first of all you need to unbolt these two bolts at the front there's also two at the back which needs to come off and to do this you need to do with a 3/8 spanner once you've remove the front two then you can go ahead and remove the two at the back as well so make sure you store these bolts in a safe place okay so now you've moved the four bolts and you should be able to just lift this top cover up now much come straight off like that now if you're lucky you should be able to remove that without actually taking this dipstick out so for those of you who don't know what the armature looks like then this is it it's basically just a coil which sits next to the flywheel so some people have different names for it but it all means the same thing some people may call it an armature some may call it magneto and some may call it the coil but if anyone says that they're referring to this so next you need to find the model number of your engine this is normally on the front of the top cover you used took off so once you found your number you need to then find one of the specification sheets for the engine now your engine may have actually come with one which would be very useful and you need to look for the armature air gap setting so this engine is to five not not not not and then when you look at the armature air gap which is just here and then go down level with it you'll see that it's point zero one four okay so once you find the air gap size and you can just slacken these two bolts off which hold in place so once you've slack on these two off they need to spin the flywheel so that the magnet is not touching the front of this armature here so once you got that away then you can pull it all the way back and then just nip these two up again just so it holds it right back in the far position and then what you need to do is get a feeler gauge and set it to the right amount for your air gap so this is set at point zero one four and then you need to just slide it in front of the face there in between the flywheel and the armature just in front of the first one and then you can slacken this one off again and push it forward don't force it just let it go on its own and then tighten up and then do the same for the other side and that's your armature air-gap set so now you should be able to still remove the flywheel without any problem and that should be the perfect air gap so once you've made sure that your bolts are nice and tight and the work come loose when it's running you can then put your cover back on and then you can give your engine a test run to make sure it works