They made / marketed the 9.5 from 1964 to 1973.----What is your model # for starters ?-----If coils are original they will be cracked and need replacing.---Pull flywheel to inspect.-----Needs a new water pump impeller before your first fishing trip.
You say your motor looks like new with good spark.-----It must have spark at the right time.----Must have compression.----Must have fuel.-----The carburetors on these motors have tiny passageways.-----Perhaps look at carburetor again.
Could be some dirt floating around in the bowls.-----Could be dirt in a float valve.---=---Simple carburetors and ultra easy to work on.------If you own an older Force motor you simply have to learn these simple procedures or pay the man $100/ hr !
Two stroke outboards in good condition start right up.------With the right starting procedure of course.------If you have one with the " crank and hope " syndrome , then the motor needs attention.
The 2 cylinder 40 / 50 HP models never had stickers with 100:1 mix on them.-----That was a short lived concept on the 30 HP and smaller motors around 1986 to 1988 models.
Bottom half of the gearcase.----Also called the skeg.-----Or lay motor on it's side and see if you can position shifter so you can see the hole.------Did this job many times 50 years ago when I worked at a Johnson dealer !!