Brand New GST 7.7 Won't Start  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> CEN Racing >> Brand New GST 7.7 Won't Start
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Brand New GST 7.7 Won't Start - 6/13/2008 6:48:48 AM   
runangolee


 

Posts: 2
Joined: 5/28/2008
From: , WA, USA
Status: offline 		I just got my 7.7 today and cannot get it started no matter what I do. I am using O'Donnel 20% RTR fuel. I have checked and double checked and triple checked the glow plug. I've changed to a different glow plug. I even installed my Ofna primer pump to see if that would help.

I've now gone through 1/3 of a tank just trying to get it started and 4 of my fingers are missing skin.

This truck is BRAND NEW. What could possibly be the problem??
       Post #: 1

RE: Brand New GST 7.7 Won't Start - 6/13/2008 1:03:08 PM   
sparky 25


 

Posts: 98
Joined: 5/24/2005
From: Derry, IRELAND
Status: offline 		Try the idle set screw as i had real bother starting mine first time until i opened the idle,
If you set the carb about 1mm from fully closed it should cure the problem,

I also went through half a tank and a lot of blisters until i took a look at the idle set screw

hope you get it sorted let us know if this works

These pics should help

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< Message edited by sparky 25 -- 6/13/2008 3:29:41 PM >

(in reply to runangolee)
       Post #: 2

RE: Brand New GST 7.7 Won't Start - 6/13/2008 2:44:52 PM   
nomobux



Posts: 1174
Joined: 2/21/2005
From: Ellensburg, WA, USA
Status: online
quote:

ORIGINAL: runangolee

I just got my 7.7 today and cannot get it started no matter what I do. I am using O'Donnel 20% RTR fuel. I have checked and double checked and triple checked the glow plug. I've changed to a different glow plug. I even installed my Ofna primer pump to see if that would help.

I've now gone through 1/3 of a tank just trying to get it started and 4 of my fingers are missing skin.

This truck is BRAND NEW. What could possibly be the problem??

Fuel, spark, compression. Your fingers tell me you have compression ( wear a glove ). A 3rd of a tank tells me if you've never gotten started, you are flooding it. Does it even POP ? Check the base settings, pull the plug and clear the motor.

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(in reply to runangolee)
       Post #: 3

RE: Brand New GST 7.7 Won't Start - 6/13/2008 2:50:22 PM   
The Real Dogman



Posts: 1901
Joined: 5/5/2006
From: Tucson, AZ, USA
Status: offline 		He needs to tune for the Checkvalve, he is flooding it right now!! Remove the Valve and break it in without the valve, then reinstall the valve then tune for it. Have not tested break-in with valve in place, but I'm sure it can be done, just need to lean the needles enough to get it started but rich enough to break it in well..

Hope this helps, but if you need more help I will be here..

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(in reply to nomobux)
       Post #: 4

RE: Brand New GST 7.7 Won't Start - 6/13/2008 3:31:07 PM   
nomobux



Posts: 1174
Joined: 2/21/2005
From: Ellensburg, WA, USA
Status: online
quote:

ORIGINAL: The Real Dogman

He needs to tune for the Checkvalve, he is flooding it right now!! Remove the Valve and break it in without the valve, then reinstall the valve then tune for it. Have not tested break-in with valve in place, but I'm sure it can be done, just need to lean the needles enough to get it started but rich enough to break it in well..

Hope this helps, but if you need more help I will be here..

Your right .. I missed that he had already put the valve on ... my bad.

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" I GOTTS NOMOBUX "

(in reply to The Real Dogman)
       Post #: 5

RE: Brand New GST 7.7 Won't Start - 6/13/2008 6:13:15 PM   
CEN Racing



Posts: 1516
Joined: 4/22/2003
From: placentia, CA, USA
Status: offline 		good job guys- very helpful...

If you are still having trouble please contact us at customerservice@cenracing.com

_____________________________

Best Regards
CEN Racing - www.cenracing.com

(in reply to nomobux)
       Post #: 6

RE: Brand New GST 7.7 Won't Start - 6/13/2008 10:33:59 PM   
runangolee


 

Posts: 2
Joined: 5/28/2008
From: , WA, USA
Status: offline 		Thanks for all the replies!

I took it to my friend who is an RC pro and WE GOT IT RUNNING!

We took the check valve off first, as Dogman suggested, but still couldn't get it running and it was still crazy rich. I checked the LSN and it was a full 2 turns out from flush so we leaned that out, then leaned out the HSN, gave it more idle, and a fully charged glow starter. After just a few turns she came to life!

It seemed to be set much too rich from the factory, and I think my glow starter was too weak.

I'm breaking it in now with the heat-cycle method. Unfortunately after getting it running I found my front brakes didn't work at all. I'm not sure if it fell off or if it was never put on but the front brake lever and spring were completely missing. I looked for any loose screws when I got it but its hard not to miss something.

Thanks again for the help, I can't wait to start tuning!

(in reply to CEN Racing)
       Post #: 7

RE: Brand New GST 7.7 Won't Start - 6/13/2008 10:40:29 PM   
CEN Racing



Posts: 1516
Joined: 4/22/2003
From: placentia, CA, USA
Status: offline 		Sounds like you need mx203 and gs276- just to let you know some of our factory guys run rear brake only as it makes the truck turn better on the race track!


_____________________________

Best Regards
CEN Racing - www.cenracing.com

(in reply to runangolee)
       Post #: 8

RE: Brand New GST 7.7 Won't Start - 6/13/2008 11:04:13 PM   
burningpoo



Posts: 622
Joined: 5/4/2007
From: easton, PA, USA
Status: offline 		I had to crack my plug a little to get it to start at first, then tighten once the glow starter was off. I know I'm late, and it's running, but might help someone else.

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Taking unbroken toys aparts since 1981

(in reply to CEN Racing)
       Post #: 9

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