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post #31 of Old 04-21-2013, 04:41 PM
ASteve
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If gas is coming out the vent tube it is your float adjustment, needle not seating or too much fuel pressure pushing past the needle and flooding your engine.

SC

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post #32 of Old 04-21-2013, 06:29 PM
86cj74.2L
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You loosened up the flat blade screw then turned the needle assembly with a 5/8 inch wrench to adjust it. Take it off again and adjust the float 1/8 lower then it is not.

It's not hard adjusting the float height. I had issues back in the day cause I thought the screw did it.

Also you could start over with a new needle and seat. And try again.

Edit

Holley has a how too on YouTube on setting float height.
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post #33 of Old 04-21-2013, 07:07 PM
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Turning the 5/8 nut clockwise while holding the locking screw in place will lower the float height.

If you pull the bowl off holding it upside down a good needle and seat test it trying to blow air through the fuel line. If you can with the float bowl inverted you need to replace the needle and seat.
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post #34 of Old 04-21-2013, 07:13 PM
ASteve
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86...that's how I checked mine a few weeks ago...

OP here's some good info...

http://holleytv.com/?cat=13

scroll down for float adjustment...

SC
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post #35 of Old 04-21-2013, 07:22 PM
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Quote:
Originally Posted by ASteve
86...that's how I checked mine a few weeks ago...

OP here's some good info...

http://holleytv.com/?cat=13

scroll down for float adjustment...

SC
I'm on my cell or I'd post a link to Holley's YouTube video.
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post #36 of Old 04-21-2013, 09:08 PM Thread Starter
flshovelhead
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Quote:
Originally Posted by ASteve View Post
86...that's how I checked mine a few weeks ago...

OP here's some good info...

http://holleytv.com/?cat=13

scroll down for float adjustment...

SC
Thanks for the link. I watched Holley's instructions for setting the float adjustment on a running engine.

I pulled the inspection port screw on the side and gas came out of the carb; obviously the float level was set too high. I backed out the locking screw and turned the adjusting nut clockwise approximately 3/4 of a turn. I then reinstalled the inspection port screw on the side of the carb and attempted to start (with the choke plate partially closed).

Good news:
The carb didn't spew gas out the top like on every other occasion.

Bad news:
The engine ran very poorly and seemed like it was on the verge of stalling. I then blipped the throttle and the RPM went up to a very high setting. I attempted to actuate the choke linkage lever to open up the choke plate and drop the engine RPM. It didn't seem to have much of an effect on the RPM, but the engine cut off shortly there after.

To further confuse the issue, when I had attempted to start earlier and had the geyser of gas shooting out of the top of the carb the engine seemed to be running halfway decently. At one point I pulled the fuel inlet line and let the carburetor run with the just the gas in the float bowl and it seemed to run strong until it consumed all the available gasoline in the bowl. Other than dinking around with the float level adjustment nut I haven't changed any other settings.

I poked around in the HolleyTV video links, but all the tuning videos are predicated on a normal running carb with only minor fine tuning. So, is there an initial setting for the engine idle screw the carb should be at? What base line adjustment should I start with to get a "normal" setting to start with?
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