gas flow for gt18

My tractor only starts great when i pour some gas down the carb.
If i use it daily it is Ok . Any thoughts on what to change to fix this or do i have to install a primer bulb inline with the carb. Putting pressure into the gas tank works as well

If your engine is an Onan, I have been down this road. The diaphragm in the carb gets stretched out and can't pump the fuel from the tank under the seat efficiently enough to satisfy the engines thirst. I tried rebuilding the carb at $60 for the kit to no avail. I then used a low pressure fuel pump that overpowered the new brass float.(the original foam ones stick or sink). I built a return system to the tank metered with a needle valve to reduce the pressure to the carb. All of this sort of worked until I found an electric fuel pump on a junked motorcycle. It was the kind that clicks until it reaches a set pressure and then turns off. This worked great but I couldn't get it to run at higher rpm. I suspect the ignition condenser and will change it when I get caught up this spring.
If it works, I plan to build an "Anniversary Tractor" as shown on this site.
Hope this helps....good luck.

I JUST GOT TO JUMP IN WITH MY TWO CENTS WORTH. ASSUMING THIS IS A ONAN I ALSO HAVE A BRIGGS GT16 WITH THE SAME PROBLEM. THE NEWER ONANS HAVE AN AUX. CRANKCASE PRESS. & VACCUM OPERATED
FUEL PUMP THAT WORKS WELL TO HELP THE CARB.MOUNTED FUEL PUMP. YOU CAN EVEN GO TO THE JUNK YARD AND GET A FUEL PUMP OFF A BRIGGS OR WHAT EVER, THEY ALL WORK THE SAME. STILL USE SOME OF THE LEFT OVER PUMPS FROM MY GO CARTING DAYS WITH TILLISON CARBS. PUT A T IN THE PULSE LINE AND LET BOTH PUMP. ANY LAWN MOWER SHOP HAS PUMPS LAYING AROUND, THEY OUT LAST THE MOTORS. NO WAY WILL PAY THE PRICE OF A CARB.KIT BECAUSE THE PUMP DON'T WORK. HAVE A BLESSED DAY. JIMMY

kpaul wrote:My tractor only starts great when i pour some gas down the carb.
If i use it daily it is Ok . Any thoughts on what to change to fix this or do i have to install a primer bulb inline with the carb. Putting pressure into the gas tank works as well

I brought my st12 home that was suppose to be a good runner and kept squirting gas in the carb to keep it running. Just as i was getting ready to pull the hose to check the volume, i noticed a shut-off valve coming off the tank. Boy did i feel dumb.