Cal Club Autocross Forums

I just put the new spark plug into Maddie's kart, mixed up some gas and tried to fire it up, but no dice. It looks like there's no fuel in the line. Is there a pump or do I have to do something to prime it?

<Not knowing much>I assume it's just a gravety feed tank. Make sure any valve is in the 'on' position (typically lever in line with tube). You can disconnect the carb side of the tube and let it drain into your gas bucket a little to 'prefill' the line. The plug it back on to the carb.

Jay W

Don't really know anything about the KT100, but on a shifter, if the fuel lines are dry, we blow into the breather tube on the fuel tank to pressurize the tank and force fuel through the system.

Combine what Jayson and Rick said. Kt100 has tank on belly pan so no gravity feed, fuel pump is part of carb.

Disconnect fuel line from carb and blow into tank to prime the line. You'll still have some air in line near carb, spin the engine over with starter and watch fuel get drawn up into carb. If fuel doesn't move up into carb the fuel pump diaphragms are too old/crusty and need replaced.

Also check that the 2 needle valves are open.

Thanks, for the info, guys. Hopefully it's not the pulse pump or I'm in way over my head. Rick, how do I know if the needle valves are open? I didn't want to mess with them, as I've heard they're very finicky.

Kurt Ra wrote:Thanks, for the info, guys. Hopefully it's not the pulse pump or I'm in way over my head. Rick, how do I know if the needle valves are open? I didn't want to mess with them, as I've heard they're very finicky.

Turn them in and count the amount of revolution. Then just back them out the same amount. If you get lost, baseline Low is around 2.25 out and the hi is around 1/2 out.

Rick