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Wisconsin Engines

How much fuel pressure for Wisconsin S14D


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Old 12-27-2011, 01:41:13 AM
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Default How much fuel pressure for Wisconsin S14D

I am working on a S14D Wisconsin. I want to replace the mechanical fuel pump with a Facet Cube electric fuel pump. I am thinking that 2-3 psi is plenty. I looked everywhere on the web and couldn't find the specs for Fuel pressure. It has the Walbro non adjustable main jet carburetor. Anyone know what the F.pressure is supposed to be??
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Old 03-06-2012, 11:46:30 AM
David K David K is offline
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Default Re: How much fuel pressure for Wisconsin S14D

Get the lowest pressure fuel pump Faucet has, it's about 1 1/2 to 2 1/2 psi. Head pressure from a gravity feed gas tank is like .1 to .2 psi. It doesn't take much. Too much pressure and the float needle may leak & flood the carburetor/engine.

Dave
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Old 03-06-2012, 12:40:57 PM
Bill Sherlock Bill Sherlock is offline
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Default Re: How much fuel pressure for Wisconsin S14D

Would putting a T in the fuel line ahead of the carburetor and running a fuel line back to the gas tank be of any benefit to reduce pressure to the carb?

Bill
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Old 03-06-2012, 04:25:31 PM
Zira Zira is offline
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Default Re: How much fuel pressure for Wisconsin S14D

You can buy regulators to reduce fuel pressure, but any low-pressure pump will work fine as-is. I have run other Wisconsin's on generators from a 6-gallon boat tank with a 1-1/2 - 2-1/2 psi pump without problems. As always, YMMV.
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Old 03-06-2012, 05:24:55 PM
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Default Re: How much fuel pressure for Wisconsin S14D

Quote:
Originally Posted by Bill Sherlock View Post
Would putting a T in the fuel line ahead of the carburetor and running a fuel line back to the gas tank be of any benefit to reduce pressure to the carb?

Bill
Yes it would.

Either add a valve that can be shut down to 'regulate' the pressure, or crimp the return line a little to reduce the flow through it so it doesn't bleed off all the pressure.
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