I am thinking of picking up a Brison 3.2. It is suppose to be new but several years old. Is there anything that l should be aware of?
Ignition, case, or jug design changes over the last few years? Something that would deter you from buying it.

Thanks in advance.

I have been informed that the older model which had a Brison ignition case was somewhat problematic.

They now use the C & H to rectify this

Thanks Edge. I thoght l had heard about that before, but was not sure. I thought someone had mentioned as well something about different types of pistons or piston liners. They have been improved. Anyone else have some knowledge on this, or am l thinking of the wrong engine.

I have a Brison 2.4 and the piston and cylinder is suppose to have a Nikasil finish. I have been told this is new for these engines.

Hi Geistware
Do you know when and why they changed.

Hi Geistware,

I too have a Brison 2.4 on a Dave Patrick Extra. What Prop are you using. Do you think a APC 20X10 will be too much prop for this engine?

tlpayne,
No, I don't know why they changed.

On_Final,
APC 20x10 is good for normal flying and aerobatics but NOT 3D. I would recommend a lighter propeller for 3D.

I just got mine running after trying a new ignition. I am very impressed with the power (incredible thrust on a Zinger 22x8), and the engine seems to be easy to start so far. I wish the mixture screws weren't forward facing so I could adjust the carb with the engine running, but with the power it produces I haven't had the need to tweak it for all the RPM I can get. My engine is serial number 009 but it has a C&H ignition and has been sent in for service before, so it just goes to show how long these engines will last. Installed in a 16 pound aircraft, it will accelerate vertically almost as well as horizontally.

Is that propeller a Zinger or Zinger PRO and do you know the engine RPM?

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.

The naskil lined cylinder is a combination of nickel and carbide. It is a coating of about .003 thousandths of an inch they put in the cylinders it has excellent wear properties. The draw back to the coating is you cant bore it over a few thousandths you have to get it re sleeved.

Geist,
I'm using a regular Zinger, and when I tached it, it was around 6800 RPM. That was with an ignition that turned out to be bad, but the new ignition sounds and feels about the same, so that's probably where I am now. As you can see, there is room for improvement with a new prop and better tuning, but the engine has so much power as is that I'm not quite ready to purchase a new prop for it.

In addition, Harvey from Brison recommends at least 80psi for the engine to run, with 100psi being ideal. Mine tested at 85psi. You have to turn it over a bunch to peak out the psi reading.

Never heard of an engine having only 30 lbs comprression....Most chainsaws have between 100 and 150 lbs when cranked with the pull starter...A G62 will show at least 115 when hand cranked..One with a really good ring seal will have 150....Homelite recommends 130 to 160 PSI, with 90 being the lower limit before service......

I miss stated it was supposed to be 100 psi and it quit running at 30 psi. My mind plays tricks on me sometimes.

I JUST ORDERED A NEW BRISON 2.4 FOR A WAGSTAFF 300 EXTRA FROM GREAT PL ANES DOES ANYONE KNOW HOW IT WILL PERFORM IN 15 TO 16 LB MODEL????

I had my Brisson 2.4 in a World Models Extra 300S at 16 lbs. It flew good. Not quit unlimited vertical, but close. It would hover at about 1/3 throttle and pull out slowly.
I just wanted more power( didn't need it) so I went to a ZDZ 50. Same weight more power. I also had the 2.4 in a 14lb plane and it was a rocket. Used a Bolly 18 X 10 or a 3W 20 X 8 with good results.
I hope this helps.