HSP monster truck JBA.21cx default settings

[seanmcgrath48]

Do's any body know the carb default settings for these trucks, a guy I know over here in IRELAND go one for these HSP monster trucks for christmas, did not break it in right, and wrecked his engine:\.(the shop that sold them,made there money and closed just after christmas) No come back No INFO . I got him a new JBA.21cx nitro engine off E-BAY which they use, But theres No MANUAL with it, He's lots the manual he got with the truck. and wants me to get it running for him(break it in)
So I've no DEFAULT CARB SETTINGS for this engine as the H.S.N + L.S.N screws where fully screwed in to the carb when it came out of the box, not set at factory. . so PLEASE HELP me,help somebody eles. .
Regards 2 All.
Sean.WestCork in IRELAND

 

[samrsnow]

The needles need to be flush with their housing. That's about it.

 

[seanmcgrath48]

Cheers for that Sam?.
But wont that lean the engine out to much????:\
Regards Sean

 

[samrsnow]

No not at all...That's stock settings. Unless you have them turned out way too far.

 

[seanmcgrath48]

Thanks sam.
Idle gap set around 1mm, H.S.N.+L.S.N screwed all the way in , truck would not start.So I tryed H.S.N. 3.5 turns out,L.S.N. 1.5 turns out,truck still would not start. .:\ :\ .
So please explain it to me, as if I'am a idiot. LOL
H.S.N. ??? turns counter-clock wise from fully in.
L.S.N. ??? turns counter-clock wise from fully in.
Idle gap ??mm
Regards
Sean. WestCork in IRELAND

 

[BradZ]

No, LSN needs to be set flush. NOT the HSN. Hsn has a specific amount of turns in or out.

Ok with your problem, set the LSN flush, have about a 2mm-3mm idle gap and check your plug. Make sure it glows. I'm not sure what to do about the HSN, are you priming it??

 

[TWOCANE]

Thanks sam.
Idle gap set around 1mm, H.S.N.+L.S.N screwed all the way in , truck would not start.So I tryed H.S.N. 3.5 turns out,L.S.N. 1.5 turns out,truck still would not start. .:\ :\ .
So please explain it to me, as if I'am a idiot. LOL
H.S.N. ??? turns counter-clock wise from fully in.
L.S.N. ??? turns counter-clock wise from fully in.
Idle gap ??mm
Regards
Sean. WestCork in IRELAND

HSN 3 to 4 turns counter clockwise
LSN about 2 turns Counter clockwise
Idle gap should be 1-2 mm try closer to 1.5mm then just set the HSN and the LSN and dont mess with the gap. Make sure you have a good glow plug and a good igniter.Try a medium hot plug and 20% nitro fuel and make sure to prime it with your finger over the stinger on the pipe till it gets to the carb.
During the first couple of tanks play with the throttle to keep it running. It will be really rich and you want to get temp up to 200 shut it down and let cool make sure piston is at the bottom of stroke after 2 tanks you can lean it out a little at a time. It's not going to want to move at first but when you start leaning it out it will get better. Drive in big circles with small blips of the throttle watching temps get to 200 let cool completely then lean alittle more.W ith the rich settings you might have a hard time trying to get temps up there, if so wrap your head with tin foil and old sock when running it and remove when cooling. After you get your high side set then you start to lean your low side, use needle nose pliers and pintch to fuel line between the filter and carb the engine should run for couple of second rev just a bit and die. If starts revving real high your to rich turn screw clockwise 1 hr. try again. Run the truck after each adjustment and it has to be at opperating temp to get a good tune. When you lean out your low side the idle will rise adust it after you get the low side done. idle screw is counter clockwise for less. Hope this helps.

 

[seanmcgrath48]

No, LSN needs to be set flush. NOT the HSN. Hsn has a specific amount of turns in or out.

Ok with your problem, set the LSN flush, have about a 2mm-3mm idle gap and check your plug. Make sure it glows. I'm not sure what to do about the HSN, are you priming it??

Thanks for INFO, the reason he gave it to me too get running is that I have a
T-MAXX,I told him if he wanted a nitro truck,get a TRAXXAS or HPI, but he went away a got a CHEAP+CRAPPY ''HSP TRUCK'' instead,
Then came to me . .When it all went wrong.
He did'nt wait:jester:. .Did'nt read his manual(thrown out with box)
Regards Sean

 

[TWOCANE]

Yhea you need patients with this hobby. I dont recall hearing of HSP.

 

[seanmcgrath48]

HSN 3 to 4 turns counter clockwise
LSN about 2 turns Counter clockwise
Idle gap should be 1-2 mm try closer to 1.5mm then just set the HSN and the LSN and dont mess with the gap.

This is GREAT
Just what I was looking for. I'll try them this weekend,on the NEW JBA.21cx nitro engine.
THANK YOU so much.
As I've said before,the all guys on RCNT are A1
Allways happy to help,others. . .
Thats what makes this site the BEST there is,on the web.
Best Regards
Sean WestCork in IRELAND

 

[seanmcgrath48]

''CHEAP'n'NASTY'' HSP

Yhea you need patients with this hobby. I dont recall hearing of HSP.

There Horrible CHEAP'n'NASTY, CHINA imports,If you know your nitro's,you stay away from them.I've had a few complete newbies:\ come too me with them. To sort them out''NONE OF THEM READ THE MANUAL''and payed between 250/450euro's for them







Regards Sean