Can you start an engine with fouled spark plugs?

[Grol]

I sat on the ground for too long without leaning and my engine completely predictably died. Totally my own stupid fault.

Then I couldn't restart it, I had warnings about prime required, vapour lock, and fouled plugs. The manual told me what to do about the prime required and that the vapour lock should just make the engine harder to start, all good, but for the fouled plugs it said to lean the mix and run at higher rpm to clear them. Bit of a problem there, you can't increase rpm on a stopped engine.

So I disabled those failures and started the engine, as soon as I reenabled them the plane started coughing because of the fouled plugs. So I disabled them again and got into the air, and I'm currently sogging along at a higher rpm than usual with the mixture so dialled back the guy in the back seat had to finish leaning it.

1 - I guess this means the failures are still simulated and tracked while they're disabled, they just don't do anything.

2 - On the basis of 1 I want to clear the plugs before I re-enable the failures again, how long do you have to run lean to do that ?

3 - what actually should you do if your plugs foul on the ground enough to stop the engine ? I couldn't see a 'clean the plugs' button anywhere. Would setting the plane to 'ready to start' reset the failures ?