The Century model C-T60-K-2L has been reverse engineered to replace most Nikki regulators for field replacement. The back cover has 2 mounting lugs with the same dimensional pattern as the Nikki regulator. Water, fuel out location, and thread sizes are the same. Vacuum port in the Nikki regulator has a pressed in fitting where Century's regulator will need a fitting installed to accept a vacuum hose. Standard thread size in the Century regulator is 1/8' NPT with either a 3/16' or 1/4' NPT I.D. hose size. Fittings come straight or 90 degrees.
4-6 PSI, W/ VACUUM LOCKOFF DIAPHRAGM, NO PRIMER
Note: All units have tamper caps included, per CARB, for primary pressure adjustment and idle adjustment area. Tamper cap to be installed at idle area by the approved installer once final fuel mixtures are set on site. Most units have primary pressure settings pre-set at the factory between 4-6 PSI, depending on the application.
C-MR-1: TWO-STAGE REGULATOR, VAPOR WITHDRAWL, W/ PRIMER BUTTON
C-MR-1-AH: TWO-STAGE REGULATOR, AIR HEATED, W/ PRIMER BUTTON
Description
The C-MR-1 & C-MR-1-AH regulator is a compact two stage double diaphragm type regulator designed specifically for use with small air cooled engines. It combines both primary and final
secondary stage regulator into a single compact unit. The regulator is simple to mount on any engine size up to around 28 HP by means of a multi-purpose type bracket. The C-MR-1 regulator uses vapor fuel and the C-MR-1-AH can used liquid with the fins mounted next to a heated exhaust area. The fuel inlet received fuel from the fuel tank and the fuel out flows to the carburetor or adaptor.
Operation
Vaporized fuel is admitted to the regulator inlet at tank pressure (up to 250 psi). Since the secondary valve is closed, the pressure on the internal side of the primary diaphragm builds up
until it overcomes the spring acting on the other side of the diaphragm. The primary valve is held open by the primary diaphragm spring until the pressure in the primary chamber reaches 2 to 3 psi, at which point the force on the diaphragm balances the spring force and closes the valve. The secondary diaphragm, actuated by vacuum obtained from the carburetor or
adaptor acts against the secondary valve spring. As this vacuum begins acting on the diaphragm, the diaphragm is moved nearer the center of the regulator, opening the secondary valve. As more fuel is required, vacuum from the carburetor or adaptor increases, causing the secondary valve to open further, admitting more fuel. When fuel is flowing, the pressure on the primary diaphragm is lowered slightly, permitting the spring to open the primary valve to
attempt to bring the pressure back to 3 psi.
Effective immediately, we will no longer be including booklet instructions in our repair kits. Instead, we will be inserting an instruction sheet to guide you to our website (via QR code) to our repair kits page where you will be able to view/download the instructions you need.
Visit our repair kit instructions page, here!
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