Cub Cadet Comprehensive Guide to Carburetor Adjustments and Grease Points for Models

Lubrication

WARNING: Before lubricating, repairing, or inspecting, always disengage PTO, set parking brake, stop engine and remove key to prevent unintended starting.

Engine

Refer to Engine on page 19 for instruction regarding all engine-related lubrication.

Front Wheels

Each of the front wheel axles and rims is equipped with a grease fitting. See Figure 17. Lubricate with a No. 2 multi-purpose grease applied with a grease gun after every 25 hours of tractor operation.

Axle Grease Fitting

Rim Grease Fitting

Figure 17

Pivot Points & Linkage

Lubricate all the pivot points on the drive system, parking brake and lift linkage at least once a season with light oil.

Deck Wheels

Each of the tractor deck’s front gauge wheels is equipped with a grease fitting. Lubricate with a No. 2 multi-purpose grease applied with a grease gun after every 25 hours of tractor operation

Deck Spindles

Grease fittings can be found on the front of each deck spindle shaft. Lubricate with 251H EP grease or an equivalent No. 2 multi-purpose lithium grease . Using a grease gun, apply two strokes (minimum) or sufficient grease to the spindle shaft.

Deck Idler

A grease fitting can be found on the pivoting idler bracket on the rear of 50-inch decks. Lubricate with a No. 2 multi-purpose grease applied with a grease gun after every 25 hours of tractor operation.

Carburetor

NOTE: Carburetor adjustments should be made only after the engine has warmed up.

The engines on Cub Cadet Series 1000 tractors are equipped with a fixed main jet carburetor.

Carburetors are equipped with a idle speed adjustment screw and a low idle fuel mixture screw.

The carburetor is designed to deliver the correct fuel-to- air mixture to the engine under all operating conditions. The main fuel jet is calibrated at the factory and is not adjustable. The low idle fuel mixture screw is also set at the factory and normally does not need adjustment.

If the engine is hard to start, runs roughly, or stalls at low idle speed, it may be necessary to adjust or service the carburetor.

Turning the low idle mixture screw in (clockwise) decreases the supply of fuel to the carburetor. This gives a leaner fuel-to-air mixture. Turning the mixture screw out (counterclockwise) increases the supply of fuel to the carburetor. This gives a richer fuel-to-air mixture. Setting the screw midway between the lean and rich position will usually give the best results.

Idle Speed

Adjustment Screw

Low Idle

Mixture Screw

NOTE: Single-cylinder model carburetor shown. The Fuel Mixture Screw is the uppermost screw on twin-cylinder models.

Figure 18

Troubleshooting

If engine troubles are experienced that appear to be fuel system related, check the following areas before adjusting the carburetor.

•Make sure the fuel tank is filled with clean, fresh gasoline.

•Make sure the fuel tank cap vent is not blocked and that it is operating properly.

•If the fuel tank is equipped with a shut-off valve, make sure it is open.

•Make sure that the in-line fuel filter is clean and unobstructed. Replace the filter if necessary.

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