mabr Posted May 25, 2016 Share Posted May 25, 2016 Have a 2003 450 ES foreman that wont stay running once it gets warm. I started it and was loading up stuff to load into the little trailer i use around the house and it stalled. Didn't think much of it, I got done loading the trailer and jumped on to start again and it started but the minute id hit the gas it would stall. Did this to where it wouldn't even start. I let it sit for a couple hours and it started right up like normal. I take it for a spin to see if it was a fluke and it stalls after about a 1/4 mile and does the same thing as before. Pulling choke wont help it just wont stay running when warm. Any ideas where to start? Would dirty carbs allow it to start cold and stall once warm? It fires but wont stay running. Quote Link to comment Share on other sites More sharing options...
rundrave Posted May 25, 2016 Share Posted May 25, 2016 certainly sounds fuel related in the carb or a vapor lock or could be as simple as a new spark plug....Check the gas tank vent tube and at the same time, check the fuel filter. Probably just fuel starved. If the tank does'nt have a good vent, it will run as you describe, then die. you could also try to ride it with the gas cap off to check if the problem goes away otherwise a good check of the carb may be in order. could be a stuck float. sounds like the motor will run on what ever gas is in the bowl and then dies Quote Link to comment Share on other sites More sharing options...
leech~~ Posted May 25, 2016 Share Posted May 25, 2016 43 minutes ago, mabr said: Have a 2003 450 ES foreman that wont stay running once it gets warm. I started it and was loading up stuff to load into the little trailer i use around the house and it stalled. Didn't think much of it, I got done loading the trailer and jumped on to start again and it started but the minute id hit the gas it would stall. Did this to where it wouldn't even start. I let it sit for a couple hours and it started right up like normal. I take it for a spin to see if it was a fluke and it stalls after about a 1/4 mile and does the same thing as before. Pulling choke wont help it just wont stay running when warm. Any ideas where to start? Would dirty carbs allow it to start cold and stall once warm? It fires but wont stay running. Wonder if may be the choke cable or flipper is broke inside the carb and it stuck on? Or your float is stuck? Quote Link to comment Share on other sites More sharing options...
Macgyver55 Posted May 26, 2016 Share Posted May 26, 2016 (edited) I would start by turning off the fuel shut off then disconnecting the fuel line at the carb. Use a suitable container to catch the fuel and turn the valve back on to measure the fuel flow. The fuel should flow out in a steady stream. If it dribbles out slowly or slows down after a short while the shut off could have debris in it. If it runs out nicely I would then move to the carburetor to check for sticking float, needle valve or dirt in the needle seat. Edited May 26, 2016 by Macgyver55 leech~~ 1 Quote Link to comment Share on other sites More sharing options...
mabr Posted May 26, 2016 Author Share Posted May 26, 2016 Thanks folks, gonna be a weekend project for me. Never thought about the float bowl but that makes sense it running for the amount of time it runs. Quote Link to comment Share on other sites More sharing options...
BoxMN Posted June 27, 2016 Share Posted June 27, 2016 Ever figure it out mabr? Quote Link to comment Share on other sites More sharing options...
mabr Posted June 27, 2016 Author Share Posted June 27, 2016 Hey BoxMN, It was the fuel valve. It's not getting enough in the on position. Turn it too reserve and it runs fine. Im waiting until its about out of gas to tear into it. There's no risk of hurting anything running with it in reserve is there? leech~~ and BoxMN 2 Quote Link to comment Share on other sites More sharing options...
BoxMN Posted June 28, 2016 Share Posted June 28, 2016 I wouldnt think so. Glad it is simple Quote Link to comment Share on other sites More sharing options...
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