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Old 02-20-2015, 09:52 PM
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Davezilla Davezilla is offline
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Join Date: Mar 2014
Location: San Antonio Texas
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Default Re: mikuni fuel pump on briggs and stratton?

On a 4 stroke engine you would need the fitting to come off the intake manifold since the pressure inside the case under the piston would not produce a strong enough pulse and also since the lower case needs some ventilation to reduce pumping losses that reduce total power.

This works really well on a 2 stroke since the case is sealed in order to make a strong transfer pressure in order to send the fresh air/fuel charge into the cylinder. The intake manifold pulses on a 4 stroke are also stronger than on a 2 stroke.
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