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Richard Lorenz · 10-02-2020, 02:18 PM

A point of trivia is that I am certain that the 2505N and 2415N were not made by Zenith. Zenith always put its name on the bottom piece of the carburetor.

One place that the 2405N is superior to the Zenith B is with a powerful engine. The Zenith B was built to be used with a fuel pump. It has a relatively small opening feeding the "needle". I tried a Zenith B on an upgraded Model A engine and the bowl ran out of gas about half way up a 4% grade hill near my house. I would then pull over and wait a minute or so for the bowl to refill so that I could restart and climb the rest of the hill. The 2504N type carb would not have this problem.

10-02-2020, 02:18 PM	#12
Richard Lorenz Senior Member Join Date: May 2010 Posts: 447	Re: Zenith 2405N replacement carburetor A point of trivia is that I am certain that the 2505N and 2415N were not made by Zenith. Zenith always put its name on the bottom piece of the carburetor. One place that the 2405N is superior to the Zenith B is with a powerful engine. The Zenith B was built to be used with a fuel pump. It has a relatively small opening feeding the "needle". I tried a Zenith B on an upgraded Model A engine and the bowl ran out of gas about half way up a 4% grade hill near my house. I would then pull over and wait a minute or so for the bowl to refill so that I could restart and climb the rest of the hill. The 2504N type carb would not have this problem.