I have an older Brisson 2.0 and the ignition didn't work. I sent the ignition to CH Electronics. They rebuilt it for $75.00 .
If you can check the compression it should be about 30 lbs psi. Mine quit running at 25 lbs psi. I had it rebuilt into a 2.4 It cost about $300 to rebuild. Great motor.
I used a 20 X 8 3W prop for unlimited vertical on a 14.5 lb plane .
On a 16 lb plane I could still pull out of a hover.