Tue, yes that's what i think, i have not seen any pump on it, its a manual start so has no electrics on it (it has got a navigation light socket on it, 12V 60W max) so i dont see how a pump would actually be able to be ran.
The fact that it backfires through the exhaust should indicate plenty of fuel and a bang at the wrong time/ hot gasses igniting the excess fuel.
It only has one carb, and its getting enough fuel (it just does not fire it)
However, today, after snapping 3 bolts and getting shouted at, and me getting P***ed off at the "Marvelous" American design of the machine (it would not take my big ratchet, To fit it on you need to undo the spark plug lead clamps, which can only be undone if you remove the bracket, and to undo the bracket, you need to stick your ratchet with socket on the bolt, but it does not fit because the spark plug lead clamp is in the way...
Ended up removing the ratchet out of the car set, it was narrower and DID fit.
So, coils removed... and im shocked...
As you can see, the left one has a crack, and arc-ing marks on it. it also has a bit of sticky tape to hold a wire (which is also half burnt through) down.
The right one is TOTALLY cracked, and the magnet bit is shattered into tiny pieces, but yet again somebody has used some clear tape (Not the stock tape that is already there) and taped it all back together, on the right hand side of the right one you can see a black mark, this is also due to arcing...
New coils, Anyone?
(and new bolts....)
*Edit* Tue, its a 1978 Twin cilinder 20HP/14KW Mercury Blue Band with Thunderbolt Ignition IV
S/N 9205082 (It's a "Belgium" model, has a different flywheel for some reason)