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Tillotson 233-665 Captured Needle, Seat & Gasket Kit
233-665 Tillotson Captured Needle, Seat & Gasket Kit
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Tillotson 233-665 Captured Needle, Seat & Gasket Kit

Part Number: 233-665
Online Price: $8.99
Needle Seat Gasket Kit Captured
Availability: In Stock.

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The 233-665 Tillotson Fuel Inlet Needle, Seat, and Gasket Kit is often used to convert gas carburetors into methanol carburetors, and the fuel inlet is sometimes referred to as an alky seat. 

This seat has the largest orifice for flowing fuel in the Tillotson catalog. This doesn't mean, however, that it is used only in alky carburetors. It's often used in gas carburetors, especially rotary and reed valve 2-cycle race engines, big displacement piston port 2-cycle, and large 4-cycle engines. 

The Fuel Inlet Needle is known as a captured needle. The fulcrum arm lever "captures" the dowel on top of the needle with the fork on the lever. The captured needle is used to keep the fulcrum in contact with the needle at all times during operation. Many have used them when tracks are rough or when the carburetor fuel inlet is facing downward.

When replacing your seat, it's important to measure the length and the fuel orifice to have a correct seat for your carburetor, especially ones that have been blueprinted, built, or modified.

Seat Orifice: 0.093"

Seat Length: 0.535"

Kit includes:

.093" Seat

Captured Needle

16B-199 Copper Seat Gasket

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