Keeping it running

Just bought a 90' B2200.

It runs great when driving down the road. As soon as I let off the gas and push in the clutch, it dies.

I can let out on the clutch and it starts right back up. It just dies when you puh in clutch and let off gas.

It does idle high, which I need to turn down. Does anyone have an idea of where to look for reasons it dies?

Thanks

Does it die if u press the clutch with gas on it? someone might have the neutral safety switch wired backwards.

No, it will stay running if you give it gas. Just doesn't want to hold an idle at all.

dirty fuel system?

Changed filter, fuel looked clean.

i had one that did that and it was just the air filter...