Does anybody have any photos of their choke servo setup for a Brison 3.2 or similar engine? I'm having trouble picturing the linkage to use. Also there seems to be alot of resistance in the rotation of the choke plate. How strong of a servo do I need? Thanks in advance for any help.

Bass1 I have three Brisons, and I have yet to find a good way to connect a servo choke without a bell crank. And as you stated, there is a lot of friction/resistance on this unit. Therefore, I have just attached a HD ball link to the choke arm, then drilled a hole in the cowl and ran a 4-40 rod with a "o"bend on one end and thread it into the ball link. I also slip a piece of fuel tubing over the 4-40 rod to keep it from vibrating and damaging the cowl. Adjust the rod so the choke when off the rod only sticks out of the cowl enough to grab and pull it. Pull out, choke on, push in, choke off, easy to get to and functional.

Sorry I did not have a solution to your post, just wanted to tell you I have not been able to solve the same problem.

I basically do the same as H.Wayne S does. I haven't found a good way to do the servo-choke thing without a bellcrank so I use a ball link and piece of wire through the cowl. The only difference is I put a small wheel collar on the end for something to hold on to instead of the small loop. I also use fuel line through the cowl. I like the KISS method and this fits it perfectly. The only downside is I can't choke the engine off in flight if the throttle servo or linkage breaks.

Thanks for the replies guys. I have done basically the same thing with the rod through the cowl. Then I thought about the ability to shut down the engine in flight and was hoping there was a trick to rigging a choke servo. I guess I'll install a servo/switch or one of those fiber optic switches.

Shutting down the Brison in flight is actually rather simple with the throttle linkage connected. Just remove the idle stop screw from the front of the carb and set your throttle servo travel to a point that will shut down the engine.

The Brison carbs have a throttle return spring already installed. They are in the gas engine minority in having them. It's not much of a spring, so removing it would not greatly benefit reduced battery drain or reduced servo work load. It will bring the engine back to idle or shut down if the linkage was to fall off. You should keep the return spring in place for just that sort of event.

The resistance in the choke plate assembly is a good thing. It helps to maintain the choke plates position in flight. I don't want to think about a choke that would easily close while the plane is in flight.

here is a pic of a brison on a choke got to love a choke servo plane

the easy motors are a DA, ZDZ. i have one on my 3w-150 works great!