Quick Fuel float adjustments

Duane in Indy wrote: TRBenj wrote: Believe Holley purchased QF ~5 yrs ago. Last year is what they told me

+1

Same story I got from QF / Holley when I called to get recommendations for secondary jets.

JQ

1994 SNOB with a new QF M-600. One morning it started running super rich. Couldn't get the engine to idle. Ran fine at wide open throttle, but idle was 1,500 rpm or engine would die. I pulled the flame arresor off and saw fuel running into the mains. Back at the hacienda, I pulled the float bowl off and found that a small piece of brass had become lodged in between the needle and seat. This prevented the needle/seat assembly from stopping the fuel flow into the bowl -- hence the fuel running into the mains. So, I put in a new needle and seat assembly in the carb and it has performed flawlessly since.

The piece of brass looked like a small remnant left over from the machining process. I don't know where the brass came from, but I'm guessing from the fuel tank as I had recently replaced some of the brass fittings there.

JQ

Ahh. It was 2 years ago when I dealt with warranty. I returned it to summit.

That's about where I am, I've messed with carbs a bit but never really fine tuned one. I've never had issues with setting the floats.

I was kinda leaning towards taking the bowl off and checking,
Thanks Guys!

If you have a piece or pieces of junk just upstream of the needle and seat randomly getting stuck in between them and bouncing around it'll drive you crazy trying to adjust the float level as the piece moves around..

I'd pull the bowls and look and make sure the fuel inlet and your fuel line from the pump don't have junk anywhere.

So I have finished doing the protec to carb swap and I have been trying to work the bugs out. I had the floats adjusted to spec with the boat on the trailer. We took it out and ran the boat and the carb started flooding out the engine with gas actually dripping straight into the intake with the throttle in neutral. So I figured I was getting to much fuel pressure so I adjusted the floats down so I could barely see the fuel in the sight glass. I added a fuel filter right before the fuel pump and took the boat out and it ran decent, it acted like it wasn't getting enough fuel, So I adjusted floats back up and ran good, still not the greatest at wide open throttle out of the hole. If I eased into the throttle it would take off better, no sputtering. I adjusted the secondary's so they kick in about 35 mph.

This morning I took it out and it was hesitating at about 30 mph. Did a couple hole shots and it seemed flat, didn't run anything like it did the last time I was out. I checked the float levels and the secondary bowl was good, the primary was to high again and the gas was running into the intake again with the throttle at idle. So I adjusted the float down and it started running good again. I went skiing and it ran good other than it seemed like it was flooding out when it started up... had to open up the throttle in neutral to get it to start.

This is getting long winded and I'm sorry about that but I am running out of ideas on why I can't keep the floats adjusted properly. Any ideas are greatly appreciated! Thanks