I'm running into an issue getting my tractor to run with the Ensign Carb I had rebuilt. The gas doesn't seem to be getting to the carb like it should.
I'm not sure what the initial adjustment settings should be. The side adjustment is currently at 1 1/2 turns. The top adjustment screw/cap is barely making contact with the plunger inside. The plunger (behind the top adjustment screw/cap) that I would normally flood the carb with to start isn't letting any gas into the carb bowl. I'm not sure if that's due to the top adjustment screw or not.
Before I started taking it apart I thought I'd see if anyone else might know. I did prime it and it wanted to start so it's promising once I get the gas flow issue resolved.


Thanks,
Brian

I had a rebuilt Ensign carb that had a stuck float. I had to used a different float. I have been told that the old floats absorb fuel and stick.

My manual RE: the Ensign carb on a Cat Twenty states high speed screw is to be opened 1 3/8 turns from closed. High speed screw is on top on my carb. Idle screw open 3/8 of a turn from closed position.

Hope this helps. Good luck!

Hi Brian,
here is a scan from my Early Products Book for mid S/No 30 carb.
The initial settings given for late S/No range units is from closed(screwed in) Main Jet (top) 1 1/8 turns open, and Idle (side) 1/2 turn open. Depending on many variables this will change.
Note the circled data in the scan attached, this may be something to look at.
Simple things like fuel blockage in :- lines, taps,fittings, banjo bolt/stud at fuel inlet bowl/adaptor and its screen, clogged fuel tank filler cap breather, using correct tank compartment/change over tap position, saw a30 once with home made manifold that needed nearly a full tank of fuel to get level with the float chamber, let alone going up hill, and probably some other places in the fuel system.
Sometimes when starting an engine for the first time I adapt a carb of known performance for the initial runs, use suitable water pipe or what ever elbows, rubber hose, etc, nothing fancy to adapt a up/down or side draft carb to fit, be it either too small or too large for the engine doesn't matter, within reason, as you are only running under no load and low speeds.
Did this on the Bosses 30 when I first got it fired up, wasn't going to chance my hernia repairs on it, needed it to fire and run with minimum cranking, and it did.
Hope this helps,
Cheers,
Eddie B.

Thanks for the replies. That does help.
I did have some gummed up lines. The tractor has been sitting for a couple of years. I had the tractor running a bit today, running rich.
I wasn't sure of the high speed adjustment should be screwed in all of the way or not - tight fit. I'll set it and see if that cures it.

My Thirty runs rich until it warms up. My intake manifold must be rusted up and no heat to the carb and intake. Let it warm up and then fine tune the carb.
Hope this helps ..........Claney