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Jab Dual Throttle Setup issue

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johnd(at)data-tech.com
Guest

Posted: Tue Oct 23, 2007 12:18 pm Post subject: Jab Dual Throttle Setup issue

Hi All,



I just got my dual throttle setup installed per the Jabiru USA 

instructions and have an issue with the roughness in throttle movement 

when the throttles are firewalled. The throttle cable has to bend when 

its firewalled as the arms on the bar mounted on the firewall shelf tilt 

down in this position and this causes alot of stiffness and roughness 

when pushing the throttles that far in. I havent hooked up the middle 

cable to the carby yet so this friction is just from the two throttle 

cables.



Any suggestions for improving the movement here ? Can I just grease the 

cables ?



Thanks,

John Davis

Burnsville, NC

601XL - Jab 3300

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larry(at)macsmachine.com
Guest

Posted: Tue Oct 23, 2007 2:45 pm Post subject: Jab Dual Throttle Setup issue

John,

I had the same difficulty with the cable end moving around a radius and 

resolved most of it by adding a link

that stays straight with the cable but allows the link full travel.  

You'll have to study the linkage shown in

the image below. This will leave you with a much smaller amount of sweep 

thru the firewall and you'll be less

likely to break the end fitting.

http://www.macsmachine.com/images/controllinkages/full/throttlelink.gif



Larry McFarland 601HDS at www.macsmachine.com



John Davis wrote:

 	  Quote: 	
		   



 Hi All,



 I just got my dual throttle setup installed per the Jabiru USA 

 instructions and have an issue with the roughness in throttle movement 

 when the throttles are firewalled. The throttle cable has to bend when 

 its firewalled as the arms on the bar mounted on the firewall shelf 

 tilt down in this position and this causes alot of stiffness and 

 roughness when pushing the throttles that far in. I havent hooked up 

 the middle cable to the carby yet so this friction is just from the 

 two throttle cables.



 Any suggestions for improving the movement here ? Can I just grease 

 the cables ?



 Thanks,

 John Davis

 Burnsville, NC

 601XL - Jab 3300

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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rge177(at)yahoo.com
Guest

Posted: Thu Oct 25, 2007 3:31 pm Post subject: Jab Dual Throttle Setup issue

John,

   I had the same problem.  I did grease mine, and

that helped a little.  The heavy wire inside the dual

throttle cable housings, tends to want to curl in one

direction, and it helps to rotate the cable inside the

housing so that it curls the way you need it to

deflect.  I ended up extending the center leg on the

bellcrank about an inch, and mounted a bracket to hold

the center cable adjuster on the front of the shelf. 

Now the dual throttle handles only have to travel

about 2", and this gives me the needed 2 1/2" travel

at the carby and eliminated the rough spot in my

throttle. I still have just a little more friction

than I would like (because of the drag of the co-pilot

throttle cable), but I think it will be acceptable. 

Be sure and check out Lance Gingell's site to see how

he mounted his.



Ron

 	  Quote: 	
		  I just got my dual throttle setup installed per the

>instructions and have an issue with the roughness

in throttle movement 

when the throttles are firewalled. The throttle

cable has to bend when 

its firewalled as the arms on the bar mounted on the

firewall shelf

 tilt


	


 	  Quote: 	
		  down in this position and this causes alot of

stiffness and roughness 

when pushing the throttles that far in. I havent

hooked up the middle 

cable to the carby yet so this friction is just from

the two throttle 

cables.


	


 	  Quote: 	
		  Any suggestions for improving the movement here ?

Can I just grease the cables ?


	


 	  Quote: 	
		  Thanks,

John Davis

Burnsville, NC

601XL - Jab 3300


	


__________________________________________________

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