C4RC
When you run a Cline or Iron Bay regulator you have a check valve in your pressure line to the tank that holds the pressure in. With the engine running you will have 2 to 12 psi in the fuel tank. When you shut the engine down the pressure will still be in the tank so you need to burp it. To do this you just pull the pressure line loose and let it go psssst. This way the fuel tank won't be trying to feed the carb with the engine off. Remember you will have the throttle and trim all the way back with the engine off. You also have to do this if you have a YS engine.

Do a search here on RCU for Cline Regulator and Iron Bay regulator. You will get all the info you need to make your decision. They are both the same principal, the Iron bay seems to be better made and a little cheaper. I have used the Cline with good results but I think I am going to try an Iron Bay the next time.

[link=http://www.ironbaymodelcompany.com/index.html]Iron Bay [/link]
[link=http://www.billsroom.com]Cline[/link]
DEG