Replaced carburetor but lawnmower still not starting

Fuel line on my Mountfield is leaking now ffs. All this talk of mowers I filled it up without checking for leaks.

Mine would start and cut out if I didn't have it full throttle, a manual choke. Even moving down from full throttle to normal throttle a bit too early might make it splutter.

Lads, its still bloody cold out. I wouldnt even dream of getting the mower out in this; she just wont run in this cold.

Bring it into the house for a day, i bet she will run fine them ;)

OK so now having read more from my last post if you put a new good quality spark plug in and it's still the same it sounds like your problem is the coil.

Get a sheet of A4 printer paper and put it between the poles of the coil and the magnet. Tighten up and remove the paper, thats probably a bit tight but if the flywheel spins you're fine. If its still to close then fold the A4 in half and use two sheets between the poles and the magnet.

I doubt in a hundred B&S engines I've never had a bad coil. Occasionally a bad connection to the spark plug. Simple plug test is to take the plug out with it still on the lead and turn the engine over with the end of the plug grounded on the metal of the engine. If you can see a spark then you can be fairly sure the coil, plug lead and plug will start the engine.

Next step if that worked is to put a shot of petrol directly in the cylinder put the plug back and see if it will start. If it fires and just fires a few times you are looking most likely at a fuel supply - carb - problem.

The coil and flywheel shouldn't touch. There is a specific gap XXX thou of an inch but its not that important. As near as possible not touching is all I've ever done.

Plug gap looks fine.

If you have a spark does the engine run at all?

Yea gap looks fine but give it a good that end a clean with a wire brush before putting it back in.

As some stated above you need to check the strength of the spark of that plug. Usually in darker light. You need to be seeing a good bright consistent blue spark when the pull chord is being pulled.

Again when doing that stuff always keep clear and be mindful of the blade underneath. Maybe take the blade off to while testing that.

Thats normal. Don't forget its cooled by blown air and that air contains a lot of dust and other crap.