190 XT Gas tractor issue

Hey Pat, if there is fuel in the carburetor bowl then there is enough fuel for starting. a fuel pump issue will show up if the fuel level in the bowl is allowed to drop enough that it causes a lean condition, usually when its using more fuel under load. 

Is it the Holley or a Zenith?

It is a Zenith Carburetor. 13303A to be specific. I know I have a good seal. When I spray starting fluid around the base it doesn't make any difference. It seems like it is not putting any gas up into the intake at all. It doesn't matter how much I screw in or out the screw. I am starting to think it could be the carburetor has an issue. 

'Then and Now Automotive' in Weymouth, MA has fuel pump kits for them. I believe their part number is CK-42-20, but they can look it up and check. They're very helpful and can cross-reference and build a pump kit for pretty much anything.

Edited by DanielW - 25 Feb 2025 at 11:29am

I have an update. I hooked and electric pump up directly to the carb. with a line into a gas can. And, it lit right off. So, I took my air hose and blew the lines out back into the tank. When I looked into the tank afterwards, There were alot of rust chunks that went back into the tank. When I looked into the tank before that? It looked very clean in the bottom. The only thing in there was a piece of the cap gasket. But, it was nowhere near the sediment bowl port. The rust chunks must have came from the line. Or, were trapped in the sediment bowl inlet. For information, you can only see the left side or second sediment bowl inlet through the cap. Not the right hand side one. But, after that? The pump still wouldn't pick up fuel. I hooked the electric fuel pump up to the fuel line to the carb. I let it draw fuel through the line through the factory pump until fuel came. The line was dribbling steady. So, I cranked the engine and, voila! We have fuel, a steady stream. I hooked it back up to the carb. and, it runs fine. So now? The next step will be pulling the sediment bowls off and putting screens in the inlets to keep the rubbish out. It looks like that will be a job getting under the tank. But, I will make it work. Thanks alot for all of the advice. Just glad I got it running.  Thanks   Pat 

Just a 12 volt gasoline electric fuel pump that can pump at least 10 GPH (gallons per hour). It can pump 100 gallons an hr and that's ok. Just has to be 10 GPH minimum. I'd say 2 psi is enough. 5 psi might be plenty.

I aa couple of Edelbrock 2-3.5 psi, 30 gph pumps that I used to get it running. Would one of these be adequate? And, not overpower the needle? At 30 gph it should pump enough fuel to keep it running under load I think. Am I close? Or will this over fuel? 

Thank you. That is what I thought. 30 gph is what it would only  run unrestricted. 2-3.5 average is what I was looking for. Maybe the pump repair place will respond someday. But, until? I will put the pump on tomorrow. Downed trees to move.....Thanks for all you help all.    Pat 

Gary Burnett wrote: DSeries4 wrote: Gary Burnett wrote: The rust in your tank is the root problem and won't go away on  its own.My solution with all old gas tractors that has worked well for me is to take the sediment bowl off replace it with a 3/8 nipple then run screw on a T to the nipple.Out the side of the T I put on a nipple that fits the gas line hose then on the bottom I out another nipple with a brass valve in the end.Most of the rust that comes out the tank into the 3/8 nipple will fall directly into the lower nipple then the valve can be opened to let the rust out.On the line going to the carb or in your case the fuel pump I install a clear inline filter so I can see what has come out of the tank into the fuel line.This keeps anything out of the pump and/or carb.If the gas quits flowing thru the filter its either stopped up with crud or the gas had water in it and swell the filter shut.Replaceing the filter is simple and costs next to nothing.BTW I ran a  D19 for years that orginally had a fuel pump with no fuel pump just have to keep in mind not to let the gas get below half a tank. Just get the tank cleaned out.  Problem solved. Probably the best solution but then again it won't stop things from being in the new gas or other things that seem to be able to get in a tank.Or keep the tank from rusting in the future.Its surprising the things I have seen show up in fuel filters.

My solution to dirty tank thus far, has been to use a short chunk of copper line pushed into the the inlet of the sediment bowl/petcock & cut to about an inch higher than the original inlet.  This allows drawing fuel from a little higher up & the heavier chunks of rubbish just stay in the bottom of the tank.