How to put CDI in a 25 horse Tohatsu two stroke 2000 model

https://www.tohatsu.com/contact/wiz_modelyear.html

It does seem like an ignition problem.
I don't have specs for your motor, but generally Resistance type HT (spark plug ) leads should show up to 10K ohms or less so infinity means a gap somewhere .
Primary side of the coil can be as low as 0.5 ohms and up to 100 ohms.
Make or buy a spark gap tester. Be careful not to hold the wires or tester. You would know that this is high voltage, but others reading this may not on first try.
Cranking the engine with spark plugs removed keep the tester away from the spark plug holes and any fuel. The spark should jump 5/16th" or more.
If it's only one spark that is weak then it's most likely the plug coil, but to be sure swap it with another to check to see if the weak spark goes with it, otherwise it's most likely a CDI unit. If all sparks are weak then it could be the CDI charge coil or the CDI unit. You would need to find the output specs for the charge coil to confirm which is the problem. Often they put out 150 to 200 volts AC at cranking speed
I hope that helps

very possibly can
if there are 2 small shockys in the mount , the rams will fit in their place and the rest is academic as to fitting
You should be talking to a Tohatsu service dealer as they have all of the ideas as to the fitment procedures

fit a longer leg section to the power head
talk with a tohatsu service agent for the longer leg

Yamaha, Suzuki, mercury, Evinrude, Johnson, Tohatsu???

On your transom plate or swivel bracket you'll find a sticker with exact engine make, type and serial... Please give the right and complete information!

a quality injector will be ok
to avoid problems do not use any e-mix fuels as the ethanol content attracts moisture that gives you fuel and injector problems

change cd and coils ck plug wires

Run 5 races, with 5 horses per race.
Thus, all 25 horses have competed exactly once.

Pick the winner from each of the 5 race,
and run one more race, namely a 6th race, with those 5 horses.

The winner is the fastest horse of all 25 horses.

Check your kill switch. Spark comes out of the stator, then to your coils