How do I release a choke on a Walbro so it works freely with a servo
04-06-2013, 10:09 PM
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How do I release a choke on a Walbro so it works freely with a servo
I have a DA50 with a Walbro Carb. I need to release the choke from having resistance so a servo can operate it. I got a CRRC pro 50cc from a friend and the choke is released on that Walbro - it moves freely, but he got it from someone else and doesn't know how it was done.
04-07-2013, 03:31 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
Remove the choke butterfly and shaft. there is a small spring and ball under one end of the shaft hole. Remove them and reassemble shaft and butterfly. Good luck,, red
04-07-2013, 08:44 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
ORIGINAL: Ih82crash
just extend the arm on the choke and you dont need to release it.
just extend the arm on the choke and you dont need to release it.
Just like the issue of removing throttle springs, there is just no good reason to remove the choke detent spring and ball.
04-07-2013, 08:59 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
Yeah, I have a choke operated by a servo on one of my planes. Just a slightly longer arm on the shaft and a standard servo and it works fine.
If you do decide to disassemble the choke to take out that detent ball and spring, make sure you grind the staked portion of the screw off with a Dremel and a stone before removing the screw. If not, you will most likely ruin the shaft when taking out that screw.
AV8TOR
If you do decide to disassemble the choke to take out that detent ball and spring, make sure you grind the staked portion of the screw off with a Dremel and a stone before removing the screw. If not, you will most likely ruin the shaft when taking out that screw.
AV8TOR
04-07-2013, 11:35 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
How small of a servo are you using? I have a mini hitec 225 on my dle35 and it works with no problem.
04-07-2013, 11:53 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
ORIGINAL: skillet92
How small of a servo are you using? I have a mini hitec 225 on my dle35 and it works with no problem.
How small of a servo are you using? I have a mini hitec 225 on my dle35 and it works with no problem.
04-07-2013, 12:21 PM
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RE: How do I release a choke on a Walbro so it works freely with a servo
Truckracer I was told a good technique for setting up throttles and chokes and air valves from a fellow club member. I use an 8fg so I go into the end point menu and set that channel to zero of both sides. Then I plug the servo in and move each side to the proper setting. Works ever time and I don't have to worry about burning up the servo.
04-08-2013, 09:50 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
I had to put the Throttle servo and the choke servo so close together and there hard to get to behind the firewall on the 1/4 scale Great Planes Patty Wagstaff so it would be difficult to use a 1" arm to operate the choke. I got it to work pretty good without removing the choke spring. It would work better to remove it and let the choke move freely.
So there's a self tapping end on the screw that holds the round choke plate that I have to grind off.
I tried to take off the red anodized throttle arm on the DA50 and the screw head came off - ouch! I thought I was SOL but I had a Arm setup from Hobby King that goes over the whole throttle shaft that saved the day. Why do they use red Loctite on the screw threads don't they assume someday someone might have to the arm off!!
So there's a self tapping end on the screw that holds the round choke plate that I have to grind off.
I tried to take off the red anodized throttle arm on the DA50 and the screw head came off - ouch! I thought I was SOL but I had a Arm setup from Hobby King that goes over the whole throttle shaft that saved the day. Why do they use red Loctite on the screw threads don't they assume someday someone might have to the arm off!!
04-08-2013, 01:47 PM
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RE: How do I release a choke on a Walbro so it works freely with a servo
ORIGINAL: Basil Yousif
I had to put the Throttle servo and the choke servo so close together and there hard to get to behind the firewall on the 1/4 scale Great Planes Patty Wagstaff so it would be difficult to use a 1'' arm to operate the choke. I got it to work pretty good without removing the choke spring. It would work better to remove it and let the choke move freely.
So there's a self tapping end on the screw that holds the round choke plate that I have to grind off.
I tried to take off the red anodized throttle arm on the DA50 and the screw head came off - ouch! I thought I was SOL but I had a Arm setup from Hobby King that goes over the whole throttle shaft that saved the day. Why do they use red Loctite on the screw threads don't they assume someday someone might have to the arm off!!
I had to put the Throttle servo and the choke servo so close together and there hard to get to behind the firewall on the 1/4 scale Great Planes Patty Wagstaff so it would be difficult to use a 1'' arm to operate the choke. I got it to work pretty good without removing the choke spring. It would work better to remove it and let the choke move freely.
So there's a self tapping end on the screw that holds the round choke plate that I have to grind off.
I tried to take off the red anodized throttle arm on the DA50 and the screw head came off - ouch! I thought I was SOL but I had a Arm setup from Hobby King that goes over the whole throttle shaft that saved the day. Why do they use red Loctite on the screw threads don't they assume someday someone might have to the arm off!!
If you are at all worried about it, use red Loctite instead of blue, but don't ever plan on taking it apart again.
AV8TOR
04-08-2013, 03:33 PM
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RE: How do I release a choke on a Walbro so it works freely with a servo
I'll grind the tip off the screw- and to put it back on I'll use Blue Locktite. So I should also put a plastic bag inside the carb to catch the metal shavings.
Sounds good I'll perform the sergury now!!
Sounds good I'll perform the sergury now!!
04-13-2013, 03:33 PM
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RE: How do I release a choke on a Walbro so it works freely with a servo
That was really easy to do. The Choke moves really easy now and doesn't stay slightly open when it's closed. Here's some pictures of the plane. Some friends told me not to use metal pushrods but I haven't had any trouble with interfearance using them on other planes. They do run through a plastic tube.
I hope the Hitec HS5645 MG servos aren't too slow. I do have a set of HS5625 MG's I could throw in instead that are faster but that are 30ft/lbs less in torqu.
I hope the Hitec HS5645 MG servos aren't too slow. I do have a set of HS5625 MG's I could throw in instead that are faster but that are 30ft/lbs less in torqu.
04-16-2013, 11:43 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
And some people play with gas and matchs, but it's not a good idea. Change the metal clevis you have to 2-56 ball links made by Dubro they are nylon and bolt on so they won't come off.
04-16-2013, 11:56 AM
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RE: How do I release a choke on a Walbro so it works freely with a servo
So it's not Radio or ignition interfearance that's the problem but a spark caused by metal to metal contact that can set some fuel around the carb on fire.
