Re: 1994 225 Vindicator
Get a spark gap tester, set the gap to 7/16th inch , pull all the plugs, ground them all except one.
Plug the gap tester into the first one you test, clip to ground and have someone crank the engine over, you should get a strong blue spark. Find the plugs that are not sparking.
You can use a remote starter switch, I just use a wire with a clip on one end and jump the starter solenoid when working alone.
I think you'll find a couple of dead holes, remove the coils and look for cracks in the potting epoxy or cracks (very small cracks).
You can also mark the dead coils and try swapping them with good ones, see if the problem follws the coil, if the problem stays in the same cylinder after swapping them out then test the powerpack.
Is the 94 225 an optical ignition?
Be carefull revving it up with no load, the dead cylinders might not be getting lube.
If the spark checks out ok on all cylinders , you might try pushing the ignition key in when shifting into gear to give it a shot of fuel, in which case rebuild the carbs with kits.
