[Shawnmills705]

Hey guys, new here. Im working on a king quad 300 for a friend. It idles but want to stall when you hit the throttle, no difference choke on or off. Carb has been through but not by myself. What i have found which i find very odd is the thing runs just the same even with the gas line disconnected from the carb and dumping into a water bottle, it dies as soon as i pull the fuel pump vacuum line from the carb. The fuel output from the fuel line is minimal. To me the pump is bad and the vacuum is somehow sucking enough through it to make it run. Thoughts?

 

[ajl719]

First off, to properly guide you in the right direction we’ll need to know the year of your 300. And welcome to the Forum.

 

[Shawnmills705]

First off, to properly guide you in the right direction we’ll need to know the year of your 300. And welcome to the Forum.

I have no idea of the year and not sure where to find it on the frame on these

 

[ajl719]

Go to the back of the bike, you’ll see two vertical downtubes. Now take a look at the left downtube, you see a small welded tag with a mixture of letters and numbers facing towards the the inside of the left rear tire. This here is your 17 digit vin#. Post up your vin# and one of us will help you decode it to see what model you have.

 

[Shawnmills705]

 

[ajl719]

Your bike’s a ‘97 per the tenth digit in your Vin#. Do you have any identifiable markings on your bike as to what model it is..? Like Quadrunner or King Quad..?

 

[Shawnmills705]

Stickers are all peeled, king quad 300 as per the owner

 

[texas123]

I'd just rebuild the carb, add fresh fuel, spark plug, diff fluid & check/change all the fluids (like I do with all new bikes), grease it up and whatever else it needs. Clean it by hand; that way you'll find any loose grounds, connections, hoses, then take all the plastics off & check everything...
Then I'd start troubleshooting. It may be several things, but you may not know without setting a baseline.
I just got a 3 wheeler running after it sat & was covered in 1" of dust for the last 20 years by doing this. Here it as 2 days later. I think the dirt protected it to be honest.