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Summary of Contents for TILLOTSON HL Series
- Page 1 TILLOTSON LTD., CLASH INDUSTRIAL ESTATE, TRALEE, CO. KERRY, IRELAND PHONE: +353 66 7121911 FAX: +353 66 7124503 e-mail: sales@tillotson.ie SERIES SERIES SERIES SERIES SERVICE MANUAL...
- Page 2 INTRODUCTION The gasoline engine industry’s universal acceptance of Tillotson’s original diaphragm carburetor has resulted in the development, by Tillotson engineers, of the “HL” Series carburetor. Designed with a minimum of parts, this lightweight, compact carburetor includes an integral fuel pump and filter in one small unit.
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Page 3: Adjustment Instructions
CONSTRUCTION DATA The “HL” series carburetor is a lightweight, aluminium die cast carburetor composed of four basic parts: metering body, main diaphragm cover plate, fuel pump body and strainer cover. The diaphragm carburetor incorporates many of the same type components found in float type carburetor: choke, throttle, idle and main mixture adjustment screws, idle speed screw and inlet needle and seat. - Page 4 STARTING CHOKE OPERATION Starting an engine with the “HL” Carburetor involves the same methods that are used in a conventional float feed carburetor. However, since a diaphragm carburetor does not have the advantage of a great reservoir of fuel upon which to operate, the technique changes somewhat. When starting a cold engine, place the choke shutter in the closed position and throttle shutter in a cracked or open position.
- Page 5 INTERMEDIATE OPERATION Fuel is delivered into and through the carburetor in the same manner as when the engine is idling. However, as the throttle opens and engine speed increases, more fuel is demanded from the carburetor and supplied to the engine by valving in the secondary idle discharge port located immediately behind the throttle shutter.
- Page 6 HOW TO DISASSEMBLE FOR CLEANING AND REPAIR Remove idle and main adjustment screws. The model "HL" carburetor can be cleaned under adverse conditions - working on a clean surface with a minimum of tools. Before disassembling carburetor it is IMPERATIVE When reinstalling "O"...
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Page 7: Troubleshooting
TROUBLE SHOOTING Carburetor Floods 1. Dirt or foreign particles preventing Remove , clean and replace. inlet needle from seating. 2. Diaphragm lever spring not seated on lever dimple. Remove , lever and reinstall 3. Diaphragm improperly installed in carburetor. Replace diaphragm or correct installation.
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