Tillotson HL/HW Series Captured Fulcrum Arm - 155A-27 OEM Fuel Control Lever - All Classes

When sourcing top-tier racing go kart parts, precision fuel delivery components like the Tillotson 155A-27 Captured Fulcrum Arm are non-negotiable for maintaining peak engine reliability. Engineered specifically for Tillotson HL, HR, HW, and HX series carburetors, this OEM fuel control lever translates minute throttle inputs into exact fuel mixture adjustments. In high-vibration racing environments, an uncaptured arm can flutter, causing fuel starvation or flooding. This captured forked design physically locks the inlet needle valve in place, guaranteeing a consistent fuel flow whether you are running gasoline or methanol.

Optimizing Your Go Kart Carburetor for Reliability

A well-tuned go kart carburetor is the beating heart of your racing engine. The fulcrum arm height dictates the pop-off pressure and fuel metering, directly impacting your power band. By installing this genuine Tillotson fulcrum arm, you eliminate the erratic fuel delivery often associated with worn or aftermarket levers. Whether you are building a new engine from scratch or restoring an older chassis you found when searching for a frame go kart for sale, replacing the fulcrum arm ensures your fuel system operates with factory-level precision.

Built for the Demands of the Track

Durability is paramount when pushing your kart to the absolute limit. This fulcrum arm is stamped and precision-machined from high-grade materials to resist fatigue, wear, and the corrosive effects of racing fuels. Just as you wouldn't compromise on your chassis setup or settle for anything less than the best go kart tires for racing, you shouldn't overlook the micro-mechanics of your carburetor. A reliable fuel circuit means fewer DNFs and more time spent at the front of the pack. Even when managing your go kart wheels tires between heats, knowing your engine will fire up and meter fuel flawlessly gives you the ultimate competitive advantage.

• Captured Fork Design: Securely locks the inlet needle valve to prevent fuel flutter under extreme track vibration.
• OEM Tillotson Precision: Exact 155A-27 factory specifications guarantee accurate pop-off pressure and fuel metering.
• Multi-Fuel Compatibility: Engineered to perform flawlessly with both standard gasoline and aggressive methanol (alky) setups.
• Broad Carburetor Fitment: Seamlessly integrates with Tillotson HL, HR, HW, HX, and HM series carburetors.
• Enhanced Throttle Response: Translates driver inputs into immediate, hesitation-free power delivery out of tight corners.
• Fatigue-Resistant Construction: Machined from durable alloys to withstand the relentless harmonic vibrations of high-RPM kart engines.
• Crucial Tuning Component: Allows engine builders to set precise arm heights for optimal fuel circuit tuning.

Frequently Asked Questions

Q: Why is a "captured" fulcrum arm better than a standard one?

A: In high-vibration racing environments, a standard arm can flutter, leading to inconsistent fuel delivery. The captured design physically locks the inlet needle valve in place, preventing this flutter and ensuring steady fuel flow through the carburetor.

Q: How does the fulcrum arm height affect my engine's performance?

A: The fulcrum arm height is critical for setting your carburetor's "pop-off" pressure. Adjusting this height changes how easily the needle valve opens, which directly impacts your fuel metering and the engine's power band.

Q: Is this fulcrum arm compatible with methanol fuel?

A: Yes. This OEM Tillotson part is constructed from high-grade, fatigue-resistant materials designed to withstand the corrosive effects of both standard gasoline and aggressive methanol (alky) racing fuels.

Q: Do I need to replace the fulcrum arm spring when installing a new arm?

A: While not always mandatory, it is highly recommended to inspect your spring during a rebuild. If your current spring has lost tension, replacing it alongside the fulcrum arm ensures your pop-off pressure remains consistent with factory specifications.

Related Products From Vendor

• Tillotson 24B-299 High-Pressure Fulcrum Arm Spring - 37 Gram Tension - OEM Carburetor Component
• Captured Needle Seat Kit 233-665 for Alcohol Tillotson Carbs
• IAME Spec Orange Tillotson Diaphragm and Gasket Kit for Precision Tuning
• OEM Tillotson Complete Rebuild Kit for Double Stack Carburetors
• Reliable Adjuster Needle Spring 24B-449 for Tillotson Carbs