I bought one of these new from an aftermarket supplier. It's going on a 1/3 Waco YMF currently being built. This is my first big gas engine beyond a G-62, and I know next to nothing about it. The rear mounted carb was kinda unhandy when coming up with an engine mounting scheme. Others convinced me the long standoffs I had were a gamble. So I made a wood box for a mount. Now the carb is inside the box. I made a throttle servo linkage, but ignored the choke up to now. I just reviewed the instructions for electronic module and saw it has an automatic choke. Another mounting headache to run a servo to choke arm. Is this choke good and needed? If so, I would welcome any installation info, ideas, or photos if anyone has one of these engines mounted on / in a box.

Thanks,

mike Hopkins

Post a pic of your set up. Yes chokes are necessary on the first start up.

Accerc,

Here are a few photos. Hard to see but in the left view through the engine box hole, the choke lever is horizontal, throttle linkage is disconnected from pushrod. If the choke is needed I'll find a way to hook choke lever to another pushrod-servo. Big plane and no space!!

Thanks,
Mike Hopkins

Well quite a few of us just use a simple pushrod for the choke. I have done it and routed the pushrod forward so I can access it out the front. I engage the choke, then flip the engine until it starts to run, then push in on the pushrod (or in your case give it a little throttle to disengage auto the choke) and start the engine up.

I have had an evolution 35 and a 45 and both came with an automatic choke. Never used that feature. I always soldered the little hole on the choke plate closed then mounted a manual rod to run forward to the front of the cowl so that I could manually engage it. Flip it a few times to get fuel in the carb and then a bump of the throttle and it will disengage. Soldering the hole shut helps it draw fuel that much better. Both my evolutions were great running and easy starting.

Auto Choke on Evolution 152

Looks like the replies so far indicate most don't use the feature. I could find a way to run a rod out. In the meantime I was not happy with throttle linkage so I did some doodling to move the servo. It was buried behind the firewall. Also made provision for choke servo if I go that way.First photo throttle linkage before change. Second photo mechanism for both throttle and choke. Drag link and bellcrank for throttle. Link from arm to servo for choke. Third photo mocked up.No I won't use a wood bellcrank. And I do like the servos hidden inside fuse, but the linkage to make it work is not too great and it's not easy to get at.

Mike Hopkins

I also know of a few guys with somew big planes, who simply reach in there and engage the choke, then flip the prop as needed, then bump the throttle and flip it to start too. It depends on how easy it is to reach the carb like that though. But if you have a large enough cowl it may not be a problem for you.