OK... your meter ranges differently to mine and I've just noted the manual is confusing (whoops sorry first time I've expanded it on a large screen and I hadn't noticed you mention this in post #7 until just now) in that it refers on pages 2A-8 & 2A-9 to the readings on the scales of the Mercury own multimeter according to its ranges... not the actual spec readings. The actual readings are on page 2A-1.
For the stator high speed winding your figure of 132ohms is fine for the spec of 120-180.
For the low speed winding you have 2980ohms from a spec of 3200-3800
which is a little low but remember the specs are for 20degC so a bit low is OK.
For the diode test (your #13) you have 2900ohms from a spec of 3100-3700 which is only a little low and the cold applies again.
So to me the stator seems OK... do you agree?
On the trigger test (your #14) you have reading of 697ohms when the range should be between 6500-8500 by the book.
So unless you can see I'm looking at something incorrectly it seems the trigger is the one out of spec (assuming you did have the trigger unplugged from the CDI unit for testing).
Then add to this you commented a while ago it was only sparking on one cylinder and I think I replied that the stator feeds to the CDI box for both cylinders... so with the stator it is either both working or none working.
However the trigger is responsible for firing one or other cylinder so a trigger fault could in my mind be capable of just affecting one cylinder.
Unless you or anyone else can see a flaw in the logic I'd be wondering about trying another trigger... but don't hate me if it didn't work because even with the motor in front of you electronics can be a nightmare to resolve!!
Trigger that looks the right one here... Mariner mercury outboard Trigger Assembly 98450A 5 6 8 9.9 15 20 25 hp 2 stroke | eBay
I'd ask a seller to test the resistance and tell you before buying without giving him an idea what figure you're expecting. If his measured around 700ohms too then there's some real head scratching to do.