Manual Carburador Hitachi 2 Gargantas Exclusive · Premium
If your carb has an electric choke, convert it to manual pull-cable for ultimate control.
Finding the authentic factory service manual (FSM) is a challenge. The official Hitachi manuals are color-coded, include full vacuum diagrams, and provide exploded views that aftermarket manuals (like Haynes) get wrong.
The Hitachi has 15+ vacuum lines for EGR, PCV, vacuum advance, and thermal valves. Simplify by:
| Síntoma | Causa Probable en Hitachi 2 Gargantas | Solución | | :--- | :--- | :--- | | El motor se ahoga (humo negro) | Nivel de flotador muy alto o aguja de asiento defectuosa. | Ajustar flotador o cambiar aguja/asiento. | | Tirones al acelerar a fondo | Bomba de aceleración dañada o conducto tapado. | Revisar diafragma de la bomba y limpiar conducto de disparo. | | Ralentí inestable | Vacío en la base del carburador o tornillo de ralentí tapado. | Cambiar junta de base; limpiar surtidor de ralentí. | | La garganta secundaria no abre | Diafragma de vacío secundario roto o enlace mecánico atascado. | Revisar la cápsula de vacío del secundario. | | Consumo excesivo | Surtidores principales desgastados (agrandados). | Reemplazar surtidores por tamaño estándar. |
Este documento es una guía de referencia. Para reparaciones mayores que involucren la reconstrucción completa, se recomienda adquirir un kit de reconstrucción (Overhaul Kit) específico para el número de modelo de su carburador Hitachi.
The Hitachi 2-Barrel (2 Gargantas) carburetor is a staple for classic Nissan and Datsun vehicles, including the 720 Pickup, Tsuru, and various Datsun 1600/1800 models. This guide provides a walkthrough for the essential adjustments and maintenance needed for these "exclusive" vintage units. 1. Preparation and Core Components manual carburador hitachi 2 gargantas exclusive
Before making adjustments, ensure the engine is at normal operating temperature. Key components to identify on the Hitachi unit include:
Electric Choke: A large black round heater that opens the choke plate as the engine warms up.
Anti-Dieseling Solenoid: A fuel cut-off valve that prevents the engine from running after the key is turned off.
Sight Glass: A window on the side of the fuel bowl used to verify the "wet" float level.
Idle Mixture Screw: Often hidden behind a plug, this controls the air-fuel ratio at idle. 2. Essential Adjustment Procedures If your carb has an electric choke, convert
Follow these steps to fine-tune the carburetor for optimal performance:
77 620 hitachi carb adjustments...I need Help! - Ratsun Forums
Who should keep the Hitachi 2-bbl manual choke?
Who should swap to Weber?
Rating: 5.5 / 10
"The Hitachi 2-barrel manual choke is a carburetor that demands patience, a vacuum gauge, and a full can of carb cleaner. When it works, it's fine. When it doesn't, it will convince you to buy a Weber."
Nota: Estos valores son genéricos; verifique la placa de su vehículo.
Why does your Hitachi run lean or rich? The exclusive manual must include jetting tables.
Pro Tuning Trick: Use a length of clear tubing attached to the float bowl drain. Hold it up against the side of the carburetor. The fuel level should sit exactly at the seam between the main body and the top cover. If it is lower, bend the float tang; if higher, check the needle valve seat.