How do you adjust a Tillotson HS carburetor?

How do you adjust a Tillotson HS carburetor?

How to Adjust a Tillotson Carburetor

1. Locate the idle set screw at the very bottom of the Tillotson carburetor.
2. Find the low-speed adjustment screw with the “L” next to it on the carburetor body.
3. Locate the high-speed adjustment screw with the “H” on the body.
4. Start the motor and let it warm up for a few minutes.

How do you identify a Tillotson carb?

Typically, Tillotson carburetor model numbers begin with a two-letter designation, such as “HS” or “HU,” followed by a position code, such as “158F” or “7A.” The first section is the carburetor model series and the second number is the specific carburetor designation within that series.

How does a Tillotson Carb work?

pressure, permitting fuel pressure to force the inlet needle off its seat allowing fuel to enter the metering chamber. The fuel then travels from the metering chamber through the idle and main fuel supply orifices and channels to the discharge ports, into the carburetor bore and to the engine.

How do you adjust a Model T carburetor?

After the engine starts I lean out the engine by turning it clockwise until the engine runs rough, then open it up (counter clockwise) until it smooths out. This will adjust the carb for the conditions of the day. A change in temp, humidity, and elevation will require adjusting the mixture.

How do you clean a model carburetor?

Make sure carburetor is cool to the touch before cleaning.

1. Dilute cleaner.
2. Clear air filter.
3. Remove the carburetor.
4. Remove carburetor float.
5. Remove other removable components.
6. Soak and scrub components.
7. Rinse and dry.
8. Reassemble and replace.

How do you start a Tillotson HS carburetor?

Starting an engine with the “HS” Carburetor involves the same methods used in a conventional float feed carburetor. When starting a cold engine, place the choke shutter in the closed position and throttle shutter in a cracked or open position.

How to adjust the low speed needle on a Tillotson?

To adjust your low speed needle – with engine warm and carb set to factory spec turn out the needle (counter clockwise) until the idle rpm rises and then drops to almost stall – then turn it in to the top rpm and then in again about 1/8 to 1/4 max – that should do it.

When to set inlet control lever on Tillotson chainsaw?

Inlet control lever is properly set when flush with the floor of the diaphragm chamber. If diaphragm end of control lever is low, pry up. If lever is high, depress diaphragm end and push on needle for proper adjustment. (See illustration).

Where is the low speed adjustment screw on a carburetor?

Find the low-speed adjustment screw with the “L” next to it on the carburetor body. Turn the low-speed screw all the way clockwise and back it out counterclockwise one and a half turns.