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OFNA OB4 PRO clutch issues...
#1
Howdy, first nitro car and all. A friend saved it from the dumpster but decided after a while not to deal with it.

Got it mostly complete. Went over everything, but I'm still missing a few minor pieces like the battery and receiver trays.

But, I got the car to fire over and it ran for a bit, but now it won't fire over again. I'm hearing a rattling from either the 2sp tranny or the clutch bell.

What is the proper method to adjust the clutch? I can't find anything in OFNA OB4 manual PDF's. Also, this is the first nitro car I've ever worked with. Previously only dealt with electrics.

I assume its mostly the same system as nearly all use centrifugal clutch setups. But your tips would be appreciated.
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#2
is your glow plug good? That might be why it wont start
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#3
No, it was definitely the clutch. I got it to work now run now. I just have to tune the engine back to factory specs and then start over from there. But its coming along.

Runs so rich that after a while it quits and is a bitch to start again. I tinker with it every couple of days and it gets closer every time.
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#4
Glad to see another OB4 around.

I've been running one for 3 years now and havn't even concidered buying anything new.

I know alot about it so if you need any more help I would be happy to help out.:joy: :joy: :joy:
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#5
I dont know what kind of clutch shoes would be in that car. But you could take some sand paper and rough them up a bit so they grab better. IF you do that make sure you clean the clutch bell with denatured alcohol to get the junk out of the inside of it.
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#6
Any Exprience With Team Orion .18 Wasp Motors??

I Found A Guy With 38 Of Them On Ebay For Less Than $60 Shipped.

1.75 Hp And 38000 Rpm. I Wonder What Pipe Would Go Good On That Motor.

Hope It's Not Too Much Motor. Either That One Or The Revo 2.5r Is Going In For The New Season.
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#7
I don't, but I think others on the site have. Try posting your question in the engine/ drivetrain section.
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#8
BTW, Do you have a link for that auction?
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#9
http://cgi.ebay.com/TEAM-ORION-18-NON-PU...dZViewItem
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#10
that is a horrible motor to answer your question. Every one I've ever seen had problems. Tuning issues mainly.
You get what you pay for most of the time.
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