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Old 06-13-2010, 11:39 AM   #1
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Default Engine Troubles

Ok so I am a newb and I don't know how to tune an engine so I need help. I just got my truggy out for the first time this year and I put it on the starter box and it fired right up but it was idling very high so I shut the engine off and I turned the idle screw down to see if that would help. I put it back on the box and started it up again and it did the same thing.

What can I do to fix this??

any help is greatly appreciated
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Old 06-13-2010, 11:45 AM   #2
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Throttle is close, yes ?
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Old 06-13-2010, 11:47 AM   #3
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Don't shut your engine off work the idle while your engine is on. Which way are you turning your idle screw to turn the idle down?
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Old 06-13-2010, 11:48 AM   #4
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it was but i noticed that it was before I started it up so i adjusted it

i am turning it left/out as my manual shows me to which should lower the RPMs but it isn't
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Old 06-13-2010, 11:57 AM   #5
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maybe your throttle linkage and such is not set right and neutrel position is open too much
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Old 06-13-2010, 11:59 AM   #6
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maybe left air ?
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Old 06-13-2010, 12:01 PM   #7
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I'm willing to bet your LSN is set way rich. My Picco did the same the other day, couldn't get it to idle right either. Ended up leaning it half a turn to get it idling right.
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Old 06-13-2010, 12:04 PM   #8
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What should the neutral position be?

I will try leaning out the low speed needle to see if that helps any but do I have to make the adjustment to the LSN when it is running?
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Old 06-13-2010, 12:18 PM   #9
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http://www.massivemods.com.au/produc...roducts_id=275

read that
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Old 06-13-2010, 12:57 PM   #10
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Quote:
Originally Posted by rcdude236 View Post
I've never heard of doing a pinch test and tuning it to stay on for at least 7 seconds. I thought you were aiming for 3-4 seconds.
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Old 06-13-2010, 12:59 PM   #11
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well now the engine won't even start...

any suggestions now?
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Old 06-13-2010, 01:01 PM   #12
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Quote:
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I've never heard of doing a pinch test and tuning it to stay on for at least 7 seconds. I thought you were aiming for 3-4 seconds.
thats when its hot.
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Old 06-13-2010, 01:02 PM   #13
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well now the engine won't even start...

any suggestions now?
how small is your idle gap? if its .7mm to 1mm. Set your lsn back to stock settings and turn the needle in leaner till it starts. Than do the pinch test.
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Old 06-13-2010, 01:03 PM   #14
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Neobart's suggestion was that your LSN was too rich. To be honest, I'm more guessing it's lean. That would also explain why your idle screw does not solve the issue.
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Old 06-13-2010, 01:09 PM   #15
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how can i measure the idle gap?
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