Fuel System


Holley carburetors have long been a staple in the go-fast world of high-performance motoring, whether it’s NASCAR, drag racing or on the street. Much like other performance-oriented products—perhaps even more so with a carburetor—a carburetor requires a fundamental setup and a degree of maintenance, and that’s considering you have chosen the correct-size carburetor for your application, at least to get it in the ballpark. Knowing how to adjust, maintain and even repair your Holley carburetor goes a long way toward helping to ensure that your carburetor will make optimum horsepower for a long time. Because of this, we decided to compile a few troubleshooting and repair tips for the popular 4150-series Holley carburetor, which is the series designation for Holley’s street/strip and racing carburetors.

Flow Control

When this Cole 22 Nighthawk sank after a stormy night, a lot of things needed to be replaced. The fuel tank selector valve was toast, and the original equipment was no longer available for purchase. The owner of this boat decided it was a good time to upgrade to an Eddie Marine Total Flow Control high-volume fuel valve. The three-port model (PN SF-100) used here is a safe and efficient fuel valve that is ultra reliable and will flow 240 gallons of fuel per hour. Operated by a 12-volt motor, it meets all U.S. Coast Guard requirements, including the ability to be manually operated should the motor fail for any reason. A six-port model is also available with fuel return provisions for fuel-injected applications (PN SF-200).


Tuning A Marine Carburetor

There’s no escaping the fact that gasoline prices are out of sight. This has many boat owners wondering how to tune their engines so they can get more hours out of a tank of fuel, while at the same time improving overall efficiency. A properly tuned fuel and ignition system will allow your marine engine to perform at its potential and will be more enjoyable to use because it’s efficient and reliable.

The 2022 SEMA Show

The Specialty Equipment Market Association (SEMA) Show engulfs Fabulous Las Vegas annually. It brings together the biggest names in the automotive world to show off the latest and greatest, whether it’s new products, amazing custom builds, or the newest trends. TheAutoBuilder is excited to be in the thick of it all.

Plug and Play

With Mercury Marineʼs SmartCraft Gauges and Digital Throttle and Shift, You Can Rig Your Boat Faster and Easier, Have More Precise Control and Get More Information on Its Performance.

Action Packed

While the factory cast-iron four-barrel Q-Jet intake manifolds have performed admirably on literally thousands of GM applications—and if you are picking your engine from a used lot to use in a swap, it will likely be so equipped—every last one of them should be torn off the car and thrown in the dumpster.

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