R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 10-25-2009, 07:45 PM   #1
Tech Adept
 
bosshog64's Avatar
 
Join Date: Feb 2009
Posts: 181
Trader Rating: 5 (100%+)
Default Trouble Starting RB S9???

Ok so Im new to nitro, have a RB S 9 thats pretty much still in the break in process (its had an idle tank, 2 tanks and cooling process on a breakin table and about 3 tanks on the track) Anyway, I used the heat gun before starting it up today to run gas through it around the house, got it started, ran if for about 5 min or so and when I pulled it in to check the engine temp, it died. Now Im having touble getting the motor to turn over. My wheels are spinning while its on the starter box, but the motor doesnt seem to be crankng...what gives?

This is on a Losi 8T with an ofna 2motor starting box. Thanks for the help guys, it just seems like the flywheel is slipping. I can rotate the flywheel round and round and a buddy of mine was saying it needed to only go up and down, so Im just trying to get it figured out so I can go drive it!
__________________
-Xray XB9
-4x4 Slash
bosshog64 is offline   Reply With Quote
Old 10-25-2009, 08:14 PM   #2
Tech Adept
R/C Tech Elite Subscriber
 
Join Date: Jun 2009
Location: Evansville, IN
Posts: 240
Trader Rating: 13 (100%+)
Default

Pull the plug and see if the piston goes up and down when you turn the flywheel.

If the wheels are spinning, then the clutch is engaged.

Keep it simple and you will be fine.
Pull the motor off the truck, remove the bell and check for stuck shoes.
Then check that the flywheel is tight.
If there are burrs on the shoes, remove them and de-burr with a file.

Let us know what you find.
McFly505 is offline   Reply With Quote
Old 10-25-2009, 08:17 PM   #3
Tech Master
 
j_blaze14's Avatar
 
Join Date: Feb 2008
Location: Tampa, Fl
Posts: 1,693
Trader Rating: 34 (100%+)
Default

clutch nut loose... tightened up the shims with the bearings... with the losi clutch nut you have to locktite and tighten it like your life depends on it.
__________________
aGama A8 EVO - Werks B2 - Sidewinder
aGama A8E - TrackStar 150a, 2560kv, 3 and 4 cell
FlySky GT3B, Turnigy HV servos, SKY Lipos
AKA, Proline, Hotbodies Rubber
Elite Performance - HORRC.com
j_blaze14 is offline   Reply With Quote
Old 10-25-2009, 11:49 PM   #4
Tech Elite
 
merdith6's Avatar
 
Join Date: Oct 2009
Location: Brazoria, TX
Posts: 2,350
Trader Rating: 3 (100%+)
Thumbs up Hmm

It's hard to say. Not enough info. Like the above said if the wheels are spining it's turning over alright, but who knows. It sounds like the low end needle on the side is too rich. Try turning that needle in in small turns after taking the glowplug out and getting all the fuel out. It may be flooded hydrolocked, or the flywheel is loose too, but you should be careful on the motor during breakin. It takes at least 14 tanks to get faster for the track, really 1 gallon to be fully broken in, but you should be able to lean it up on the top after 18 tanks, but not too much. That is a fast engine so be nice to it, and it will last a long time. Put a new glowplug in it like a mc coy mc-8 medium plug. Check the idle speed, and lean it out just a bit on top too. As it breaks in you need to lean it, then as it's movin faster you may need to open it back up for the higher speeds. good luck, and give some more info. Check your car over really good, and yes use locktite on the clutch nut.
merdith6 is offline   Reply With Quote
Old 10-26-2009, 06:38 AM   #5
Tech Adept
 
bosshog64's Avatar
 
Join Date: Feb 2009
Posts: 181
Trader Rating: 5 (100%+)
Default

Ya I'll have to take a furthe look but I think it's the flywheel coming loose. I've been trying to break the motor in slow, but I did get it a little too hot after the 6th tank or so...it was at 260ish and it kinda scared me, but it was only for a few laps. Hopefully I didn't damage anything and will get tuis figures out asap. Thanks for the info, but I pulled the plug and it wasn't turning over.
__________________
-Xray XB9
-4x4 Slash
bosshog64 is offline   Reply With Quote
Old 11-01-2009, 05:32 PM   #6
Tech Regular
 
xBRxSAIGON's Avatar
 
Join Date: Apr 2009
Posts: 323
Default

Quote:
Originally Posted by McFly505 View Post
Pull the plug and see if the piston goes up and down when you turn the flywheel.

If the wheels are spinning, then the clutch is engaged.

Keep it simple and you will be fine.
Pull the motor off the truck, remove the bell and check for stuck shoes.
Then check that the flywheel is tight.
If there are burrs on the shoes, remove them and de-burr with a file.

Let us know what you find.
Yah, what he said...
__________________
B4 stock ~ SC10 stock ~ CRT X2 ~ RC8B
Trinity ~ Savox ~ JConcepts ~ Proline
SpeeedPasion ~ Novarossi ~ upgrade
xBRxSAIGON is offline   Reply With Quote
Old 11-01-2009, 06:05 PM   #7
Tech Apprentice
 
revodragon's Avatar
 
Join Date: Mar 2009
Location: Beaverton, OR
Posts: 59
Default

BTW 260 will not kill a RB my RB's have always ran 240 to 260 until they hit the 1 gallon mark and fully break in then they run 230 to almost 250 most of the time
__________________
B5, LRP Stock Spec V2, Novak 10.5
RC8.2, Reedy VR, Ace servos, Buku Clutch
RC8T, Reedy VR, Ace Servos
TC5R, LRP SPX, Trinity 17.5 Duo
revodragon is offline   Reply With Quote
Old 11-06-2009, 04:11 PM   #8
Tech Regular
 
xBRxSAIGON's Avatar
 
Join Date: Apr 2009
Posts: 323
Default

heat gunn....
__________________
B4 stock ~ SC10 stock ~ CRT X2 ~ RC8B
Trinity ~ Savox ~ JConcepts ~ Proline
SpeeedPasion ~ Novarossi ~ upgrade
xBRxSAIGON is offline   Reply With Quote
Old 11-06-2009, 04:12 PM   #9
Tech Regular
 
xBRxSAIGON's Avatar
 
Join Date: Apr 2009
Posts: 323
Default

always a heat gun...
__________________
B4 stock ~ SC10 stock ~ CRT X2 ~ RC8B
Trinity ~ Savox ~ JConcepts ~ Proline
SpeeedPasion ~ Novarossi ~ upgrade
xBRxSAIGON is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:29 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net