Also Sprach Short Wave Sportfishing :

Power pack?

No power pack in this old boy. It's basically an aircooled lawnmower
engine with an outboard leg. (I have one sitting in my garage)

To the OP... I'm thinking sparkplug wire maybe? Can you check with a
spark tester to see if the spark can jump the same gap on each cylinder?

Also, where ever did you find an electronic igniton for one of thses
things?

Dan

--
Every now and then when your life gets complicated and the weasels
start closing in, the only cure is to load up on heinous chemicals and
then drive like a ******* from Hollywood to Las Vegas ... with the
music at top volume and at least a pint of ether.

-- H.S. Thompson, "Fear and Loathing in Las Vegas"