Posted by JRSutton on September 17, 2012 at 18:30:25 from (75.130.109.233):
Interesting to me anyways.
My friends M has had a problem for a while dying under load or going up hill.
It'd run fine on flat ground, but when going up hill (or working hard) it'd run fine for a minute, then just sputter and die.
It was pretty obviously running out of fuel.
I assumed the carb was blocked somehow and did the usual everything you do to check and clean.
Then I thought maybe there was a float problem, but everything looked good there - though I couldn't measure the height accurately at the time.
Then it hit me - that it might be running too rich - and sucking in fuel faster than it could be replaced - not because it wasn't coming in fast enough, but because it was being drawn out too fast.
We had actually richened it up a bit to try to solve the problem at first - so I think that just aggravated it.
I leaned it out quite a bit and that did the trick - runs fine now.
SO my question is - does that sound right?
I just didn't expect a carb to be able to suck out more gas than is coming in - assuming the input side is operating as it should. I mean - that's a lot of gas.
Kind of a "it works so why mess with it" situation now... but I'm wondering if the floats don't need to be adjusted to let more gas in.
How do you tell if it's running too lean? Just watch the condition of the plugs?
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