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Old 04-18-2010, 01:30 PM   #1
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Default Motor Flame Out

What are the causes for a motor to flame out? Mine has always ran very well and now with the weather warming up it will run fine as long as Im on the trigger but will die some times when I let off. I have richened the HSN a couple of hours and that seems to have worked for now. Any other suggestions.....
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Old 04-18-2010, 01:52 PM   #2
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Sounds like it's starving for fuel on the LSN from what you describe, or too much fuel. I know it's kinda vague but it's hard to be more specific, but I suggest you work on the LSN.
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Old 04-18-2010, 02:41 PM   #3
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How many gallons did you put through the engine? Cause it could also be that the engine is simply worn out and has low compression.
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Old 04-18-2010, 02:47 PM   #4
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Originally Posted by neobart View Post
Sounds like it's starving for fuel on the LSN from what you describe, or too much fuel. I know it's kinda vague but it's hard to be more specific, but I suggest you work on the LSN.
Exactly, starving for fuel. Has nothing to do with lsn. Your fuel is distributed through the hsn. Leaner less fuel,richer more fuel. Low speed is adjusted to pinch. I pinch, rpms increase slightly and then it dies. Im almost spot on there. If I fatten it up it wont keep an idle at all, if I lean it out idles way to high.......
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Old 04-18-2010, 02:49 PM   #5
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How many gallons did you put through the engine? Cause it could also be that the engine is simply worn out and has low compression.
Motor only has 2 gallons through it, still has plenty of compression.
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Old 04-18-2010, 02:53 PM   #6
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Idle too low? Old Glow plug? Air Leak?
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Old 04-18-2010, 02:54 PM   #7
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Quote:
Originally Posted by hdcruzer View Post
Exactly, starving for fuel. Has nothing to do with lsn. Your fuel is distributed through the hsn. Leaner less fuel,richer more fuel. Low speed is adjusted to pinch. I pinch, rpms increase slightly and then it dies. Im almost spot on there. If I fatten it up it wont keep an idle at all, if I lean it out idles way to high.......
Well perhaps your idle gap isnt correct? If you lean it out a bit and then lower the idle on the idling screw a bit or vice versa.
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Old 04-18-2010, 03:07 PM   #8
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Well perhaps your idle gap isnt correct? If you lean it out a bit and then lower the idle on the idling screw a bit or vice versa.
Air gap is set at about a half mm maybe a hair larger.
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Old 04-18-2010, 05:00 PM   #9
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hey are you sure your not too rich on top??..when its starts to heat up you need to lean it a bit... usually the hotter it gets outside the more you lean, you might just ben too rich on top and if your low end is a little rich too then your just dumping way to much fuel...when your to rich on top and then let off completly your low end will still be trying to burn the little bit extra from the high speed and that might cause it to flame out going from 100% to 0%
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