R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-08-2009, 10:17 AM   #1
yep
Tech Rookie
 
Join Date: Aug 2009
Posts: 4
Default flywheel keeps getting stuck

So, I just bought a hyper 8.5 and as soon I unstuck the flywheel, I can get the pullstart cord off for about 1cm. Then it stucks again. I know they are famous for being very tight at the beginning, but is there any trick that can save me a trip to the store?
thanks
yep is offline   Reply With Quote
Old 08-08-2009, 10:32 AM   #2
Tech Addict
 
Madbrad's Avatar
 
Join Date: Oct 2005
Posts: 727
Trader Rating: 29 (100%+)
Default

Is this a new motor? If so you may need to heat it up with a heat gun or hair dryer if you dont have aheat gun. This will help you get it started and start the break in. If its not a new motor then there is some other issues. You'll need to take apart the pull start and see what is binding.
__________________
XT8 - Werks B5
Hyper 10SC Novak PRO ESC 4.5HV
Madbrad is offline   Reply With Quote
Old 08-08-2009, 10:50 AM   #3
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

There is a couple things you can do until the pull start cord breaks. If you dont have a heat gun a hair drier can help.You want to heat the block where the cly is to expand it as the hotter it gets the less it will pinch the piston when its at the top of the stroke. Next is the first time you start it for the day take the pressure line off the pipe & blow in it till you see fuel enter the carb to prime the lines & put some lube in the motor,not too much just for 1-2 seconds after you see the fuel in the line hit the carb.too much & you'll flood the eng with fuel & you'll have to take the glow plug out turn the car upside down & spin the motor to get the excess out. You can also loosen the glow plug just a bit to help reduce the compression until it starts,its not a huge help as there will still be the tight piston to deal with till its broken in but some times is just the thing needed. I would recomend all 3 at once till the motor stops sticking so often. Its always a good idea to prime your lines when starting the motor for the first time on that day for the entire life of the eng.Putting your finger on the pipe outlet will also help prime the motor faster but is also easier to flood the motor that way just because its harder to see whats going on with the fuel when your yanking on the cord. One last thing is probably in your instructions somewhere but when you pull the starter cord dont pull with your arm. Pull by flexing your wrist only that should result in the rope ony coming out 4-5" max any more & the cord & or spring will break very soon.
__________________
"TEAM TERRIBLES"
butch man is offline   Reply With Quote
Old 08-08-2009, 10:54 AM   #4
yep
Tech Rookie
 
Join Date: Aug 2009
Posts: 4
Default

alright guyz, tyvm. will try that asap
yep is offline   Reply With Quote
Old 08-08-2009, 11:10 AM   #5
Tech Adept
 
RiverDiver's Avatar
 
Join Date: Feb 2009
Location: Louisiana
Posts: 160
Default

Quote:
Originally Posted by butch man View Post
There is a couple things you can do until the pull start cord breaks. If you dont have a heat gun a hair drier can help.You want to heat the block where the cly is to expand it as the hotter it gets the less it will pinch the piston when its at the top of the stroke. Next is the first time you start it for the day take the pressure line off the pipe & blow in it till you see fuel enter the carb to prime the lines & put some lube in the motor,not too much just for 1-2 seconds after you see the fuel in the line hit the carb.too much & you'll flood the eng with fuel & you'll have to take the glow plug out turn the car upside down & spin the motor to get the excess out. You can also loosen the glow plug just a bit to help reduce the compression until it starts,its not a huge help as there will still be the tight piston to deal with till its broken in but some times is just the thing needed. I would recomend all 3 at once till the motor stops sticking so often. Its always a good idea to prime your lines when starting the motor for the first time on that day for the entire life of the eng.Putting your finger on the pipe outlet will also help prime the motor faster but is also easier to flood the motor that way just because its harder to see whats going on with the fuel when your yanking on the cord. One last thing is probably in your instructions somewhere but when you pull the starter cord dont pull with your arm. Pull by flexing your wrist only that should result in the rope ony coming out 4-5" max any more & the cord & or spring will break very soon.
+1 on that
or go get yourself a starter box and back plate for the engine, that will eliminate that pull start system!!
__________________
_____________________________________________________________________________
RADICAL RACING ENGINES www.gotnitroonline.com
ScoTT RaCe TeaM



-.- D8 621T
-.- ST-RR 621T

TuRn and BuRn!
RiverDiver is offline   Reply With Quote
Old 08-08-2009, 02:57 PM   #6
yep
Tech Rookie
 
Join Date: Aug 2009
Posts: 4
Default

its fully working now (tks every1), tho, while I was driving it, one of the wheels got out, after trying to "climb" a couple of little stairs, i dunno why. When i left the store after buying the car, I checked all the screws and they were fairly tight. Is it anything to worry?
yep is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Having a blast breaking in this Novarossi :( rcrevolution Nitro Off-Road 55 06-18-2008 06:49 PM



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 10:15 PM.


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