Question on boat motor?

Question

i have a wards 5 horse boat motor it runs but back fires and will not idle right what can it be eney other info on this motor would help

Answer 1

points and condenser

spark plug-may look new, but too much resistance

gunk in carb

gunk in fuel

water in fuel

bad plug wire

inner surface of flywheel and megneto need cleaned

bad cutoff switch

think that's about it-if you have a clean blue/white spark, try a new spark plug, if that isn't the problem, suspect fuel/fuel system trouble.

If your spark is dull orange, or you have no spark, check ignition first.