Hard to start, Engine operates irregularly or knocks, Pto clutch will not engage – Cub Cadet 3186 User Manual

Page 31: Lack of power

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SECTION 11: TROUBLE SHOOTING

Possible Cause

Possible Remedy

Hard To Start

No fuel in fuel tank or carburetor

Fill the tank with fuel. Check the fuel line,
carburetor and fuel filter.

Fuel ine or carburetor clogged

Clean the fuel line and carburetor with a
commercial carburetor cleaner.

Fuel filter plugged

Replace

Water in fuel

Drain the fuel tank and carburetor. Use new
fuel and dry the sparks plugs.

Choked improperly. Flooded engine

Follow the starting instructions.

Defective ignition or loose wiring

Check the wiring, spark plugs or fuse.

Defective battery

Check and service. Refer to “BATTERY.”

Spark plug dirty or improperly gapped

Clean, adjust the gap to .040-inch or replace
the plug.

Engine Operates Irregularly or Knocks

Engine incorrectly timed

See your authorized dealer.

Spark plug dirty; wrong gap or wrong type

Clean, reset the gap or replace

Poor or weak spark

Check the spark plugs and wiring.

Carburetor setting incorrect

Adjust. Refer to “ADJUSTMENTS.

Poor grade fuel or water in fuel

Drain and use a good grade of clean fuel.

Engine overheating

Refer to “MAINTENANCE.”

Engine valves at fault

See your authorized dealer.

Engine smokes

See your authorized dealer.

Oil level rises due to fuel in the crankcase

See your authorized dealer.

Air filter becomes oil and fuel soaked

See your authorized dealer.

Engine leaks oil

See your authorized dealer.

Misfiring

See your authorized dealer.

Other engine problems

See your authorized dealer.

Excessive oil in air cleaner

Be sure that oil dipstick is fully seated, oil fill
cap is tight, and all excess oil is squeezed out
of the pre-cleaner.

PTO Clutch Will Not Engage

Reverse pedal is partially depressed

Depress brake pedal.

Vacuum actuator not energized

Check PTO switch and connections, check
for worn or broken wiring.

Vacuum leak

Check vacuum lines.

Lack of Power

Air cleaner clogged

Service the air cleaner element. Refer to
MAINTENANCE.”

Engine overload

Reduce the load.

Engine overheated

Make sure the air intake screen, shrouding,
engine fins, side panels, dash intake screen
and grille are free of accumulated dirt and
debris. Refer to “MAINTENANCE.”

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