Duchess Driver, I suppose I should have reiterated the max 6 primes as silvereagle had posted.
If that doesn't work treat it as a flooded engine and follow the relevant FRC's Checklists
The fuel needs to vapourise to burn. No point rushing, prime the engine, have a look and shout your warning. Then engage the starter.
If you start the fire in the cylinders usually means the engine runs
Coat door etc !
However the fuel that has entered the exhaust system, dribbled all over the floor is ripe for catching fire. (Fuel Oxygen and Heat all together)
Some engines prime on all cylinders some on just two hence the different number of prime/max primes.