I need help with my nitro HPI rs4 mt

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hoopdoggy

RCNT Rookie
Messages
23
My nitro HPI rs4 mk has two problems #1 the ripcord starter has no spring so it doesn't come back in when you pull it out. Is there a way to deal with this or does anyone know where I could find one? Question two the steering servo barely moves so I don't get much steering is there a way to fix this or do I just need to put in a new servo. Also not really a question but my throttle servo twitches and is unpredictable from up close that is normal right?
 

cbaker65

Hardcore RCNT User
Messages
3,805
Location
Kern county ,Calif.
My nitro HPI rs4 mk has two problems #1 the ripcord starter has no spring so it doesn't come back in when you pull it out. Is there a way to deal with this or does anyone know where I could find one? Question two the steering servo barely moves so I don't get much steering is there a way to fix this or do I just need to put in a new servo. Also not really a question but my throttle servo twitches and is unpredictable from up close that is normal right?
If you never worked an fixed one ,then you are probably better off to find a new one ,E-bay would be the best bet to find one!

As far as the servo ,you may need to charge the battery in the car an if that dont work ,then it may be due for a new steering servo ,
but I would check the steering out first to make sure that nothing is binding or hendering the servo from working!

What engine is it?
 

cbaker65

Hardcore RCNT User
Messages
3,805
Location
Kern county ,Calif.
also do all ripcords fit all engines?
All of the pull ropes are the same size for these types of engines ,if it is only the rope broke ,you can replace it!

I am not familiure with that specific engine ,so I dont know what other brands pull starters work ,sometimes there
is others that interchange with each other from 12 to 18 size engines!
 

olds97_lss

RCNT VIP
Supporter
Messages
19,528
Location
Dekalb, IL
RC Driving Style
Bashing
LOL....I didnt think someone had a vid of the dreaded nightmare!....:D
I had found a few for others in the past, that was just the first one that came up I think this time. It's a hard thing to explain. I'm usually better with written directions, but for a pullstarter/clockspring... seeing makes it easier to understand.
 

cbaker65

Hardcore RCNT User
Messages
3,805
Location
Kern county ,Calif.
I had found a few for others in the past, that was just the first one that came up I think this time. It's a hard thing to explain. I'm usually better with written directions, but for a pullstarter/clockspring... seeing makes it easier to understand.
Lol...Well I am glad that you stepped in on this one!......:hehe::hehe::hehe:
 

alfredwong2003

RCNT Rookie
Messages
24
When you separate the pull start from the engine, does the pull start spring back. But if it doesn't has a spring in it, obviously, it won't spring back. I think you can get an HSP pull start with the 14mm hex size and check the size of the back plate as well, there are 2 sizes. Good luck. If the engine won't start, get a new one and it may be easier.
 

alfredwong2003

RCNT Rookie
Messages
24
Here is some information I found about size of blackplate and hex nut size. There are more but they are for older O.S. and Kyosho engines.

100% Brand New
Rear Cover: 11011 & 11012
11011 rear cover
Applicable engine: VX SH 16 18 21 grade
Specifications: Hole distance 27MM, Hex size 12MM Or 14MM
11012 Back cover
Applicable engine: SH 28 grade
Specifications: Hole 32MM, Hex size 12MM Or 14MM
 

alfredwong2003

RCNT Rookie
Messages
24
Now you need to find out the size of the backplate you need. That is the distance between 2 adjacent holes (center to center) and then you can get the right size.
 

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