Flymo Quicksilver 46 SD running badly

[pidgeon1]

No, its the black plastic encapsulated thing that has the HT lead sticking out of it.
John

Will look at that, didn't know it was adjustable.

Putting mower back together Saturday.

 

[Burnerman]

The only adjustment is the gap between the igniter and the flywheel, courtesy of an elongated slot that the screws pass through - I very much doubt if a gap too large has any effect on the timing, but it will affect the strength of the spark.
John

 

[lostinthelight]

During reassembly, deadman tied to handles, I would drop the fw on the crankshaft to the bottom of taper with the keyways in line.then push the key in and with blade locked rock Fw side to side to establish any slop.If there is, when the nut is tightened it could drag the fw around to an advance position .Mad but ive had that a couple if times. on B&S...When I started messing with machinery in the late 50's it was common on villiers engines with no key unless you put a tube over the crank and tapped ut to seat the fw onto the taper to keep it from turning.

 

[Burnerman]

Villiers 6E and 9E, including the original Allen scythe two stroke engine.....that had a self extracting flywheel where a flanged nut backed up to a circlip. It had timing marks though!
Maybe we should start an old timers engine forum
John

 

[lostinthelight]

Im sure theres one somewhere that would have us
What I was getting at was if there were play in the op keyway then with blade locked the fw should be turned anti clock to take up the slack, tapped down onto the taper, then the nut tightened while holding fw against the direction of nut tightening which should give the least advanced timing.....makes sense in my head anyway

 

[Burnerman]

Believe it or not, there are such things as offset flywheel keys - indeed Briggs do one.
I’ve no experience of them though.
John

 

[lostinthelight]

Believe it or not, there are such things as offset flywheel keys - indeed Briggs do one.
I’ve no experience of them though.
John

Funny you should say that, I'd not heard of an offset key but thinking about op problem today I'd worked out in my head how to make such a thing as a way of altering the timing .

 

[pidgeon1]

Is it best to use a feeler gauge to set coil gap ? what would should the gap be?

 

[lostinthelight]

Not if its a ferrous feeler gauge , it will stick to the fw...2 or 3 sheets of A4 type paper

https://outdoorpowerinfo.com/engine_specs/briggs_fly_gap.asp

 

[pidgeon1]

All back together, Found one of the coil contacts was black with grease, de-greased that.

After 12 starts there was a kick back twice nowhere near like before,
I found if I pull the starter cord a few inches out them pull all the way it seems to stop the kick back.

Supersized how smooth it runs for a neglected old mower.

 

[Burnerman]

Every petrol engine needs a spark just before top dead centre- TDC. - of the piston stroke. If the engine isn't spun over quickly enough it can tend to fire backwards for one stroke so it's maybe the technique that you are now mastering. Are you happy enough with the machine now?
John