The 3.2 is a very easy engine to run and keep.

1st use Regular or premium gas not aviation fuel.

2nd run 80:1 Klotz or Belray MC1 or any 2 stoke air-cooled synthetic/Benol lubricant.
This is what the factory runs I know I used to work there and still keep in touch there.

3rd start off with a 20x10 propeller you can change propellers for your application
but if you have problems go back to factory standards.

4th the 3.2 needle setting are posted on the website, don't strain and try to tune your way out of the problem. If the settings don't work you got problems else where, look there and don't screw with the needles.

If the motor is hot and you cannot get it to run up, Stop make sure of the above, check the screen on the carb, (Brison RC AC does not overhaul Walbro carbs yours don't run as advertised it gets yanked and replaced with a new one) check the
TCSA (the setting for the spark advanced) too advanced on a motor will make it run hot, check the plug it should be chocolate brown some are black none are supposed to be wet. If so, check the oil content to make sure you are running the above don’t be afraid to run 80:1 I have run 100:1 for several seasons on a 3.2 (Sachs Dolmar head/piston ring with no problem) don't listen to people who tell horror stories about 80:1 or 100:1 they don’t own/operate a Brison they don’t know....Gary and Harvey do. It's their motor they designed it run it like they tell you.

Check the ignition battery a low battery can cause and produce problems that sound like carb problems. Run 4.8 pack at least 1500 MAH on the C&H Ignition, If you are running someone else’s ignition get rid of it buy Carpenters ignition, his stuff works the best Bill knows A&M, Sachs/Dolmar/Makita/Brison motors like the back of his hand.

If all else fails stop, take the prop, muffler, prop washer off box the motor up send it to Brison RC Engines in Carrollton, Texas, write up a letter stating your problems, Gary and Harvey can take any disobedient motor out to the wood shed and in 10 minutes have it sitting, barking on command, Crappy running motors take one look at Gary's test stand and they straighten up real fast.

That's all I can think of good luck

JDS