Johnson Tracker 40 Troubleshooting
| Engine Model: Johnson Tracker 40 Hp |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 49.7 cu.in (0.81 L) |
| Rated Engine Power: 40 Hp (29.4 kW) at 5500 rpm |
| Fuel System: Downdraft carburetor |
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| Engine will not start or difficult to start |
Empty fuel tank - Fill gasoline up.
Incorrect fuel grade - Use correct gasoline grade.
Air in fuel system - Bleed fuel system.
Defective wiring connection of spark plug - Inspect spark plug wiring connection, change or repair.
Spark plug is faulty - Change spark plug.
Dirty fuel filter - Install new filter.
Carburetor not adjusted - Adjust according to instructions.
Dirt in the fuel lines - Fuel lines must be clean.
Fuel tank air vent clogged or closed - Open or clean air vent.
Fuel pump pressure is low - Install new fuel pump or rebuild it.
Worn or defective reed valve - Install new reed valve.
Defective spark plug - Spark plug need to be replaced.
Dirty or faulty carburetor - Service or repair carburetor.
Ignition coil is defective - Replace ignition coil as necessary.
Closed or clogged fuel tank air vent - Open or clean air vent.
Lack of fuel pump pressure - Install new pump or repair it.
Ignition system malfunction - Test ignition and replace failed parts.
Fuel pump is dirty or defective - Service or change fuel pump.
Carburetor problems - Carburetor diagnostics required.
Dirty fuel lines - Fuel lines must be clean.
Fuel tank air vent closed or restricted - Open or clean air vent.
Dirty fuel filter - Install new filter.
Worn gaskets - Install new gaskets.
Engine is overloaded - Reduce the load.
Too lean fuel mixture in carburetor - Make the correct settings.
Ignition timing is incorrect - Ignition timing needs to be adjusted correctly.
Thermostat is faulty - Install new thermostat.
Defective water pump - Install new water pump.
Incorrect propeller selection - Install correct propeller.
Propeller bent or damaged - Have propeller repaired or replaced.
Outboard engine is positioned too low or too high - Mount the motor as required.
Low octane fuel - Change fuel.
Engine overload - Load reducing is recommended.
Incorrectly adjusted low idle speed - Adjust as required.
Dirty or faulty fuel pump - Inspect fuel pump and change as required.
Main bearings or crankshaft wear - Repair or replace defective parts.
Damaged piston rings or cylinder bore - Replace faulty components.
Improperly or clogged carburetor - Carburetor needs to be adjusted correctly or cleaned.
Fuel pump is dirty or defective - Test fuel pump and replace if necessary.
Ignition system malfunction - Check ignition and replace faulty components.
Gaskets are worn - Replace gaskets.
Worn powerhead parts - Defective components need to be replaced.
Propeller pitch or diameter incorrect - Install correct propeller.
Propeller bent or damaged - Replace propeller.
Motor mounted at incorrect height on transom - Have motor adjusted to proper transom height.
Incorrect trim angle - Make the correct trim angle adjustment.
| Engine using too much gasoline |
Carburetor main jet is incorrectly adjusted - Adjust it correctly.
Defective or loose spark plug - Replace or tighten spark plug.
Worn sleeve, piston, or rings - Replace faulty parts as required.
| Excessive engine vibration |
Damaged or bent propeller - Replace propeller.
Propeller shaft malfunction - Replace propeller shaft.
Weeds in the propeller - Clean the propeller.
Motor mounting bolt is loose - Tighten the bolt as required.
Damaged or loose steering pivot Tighten correctly or replace.
Low battery capacity - Low battery charging, charge as required.
Battery won’t hold charge - Service charging system or replace battery.
Disconnected wires or corroded battery terminals - Check wiring and clean or replace terminals.
Starter motor is defective - Replace or repair starter.
| Trim motor is running but trim system cannot move up or down |
Insufficient oil - Fill up oil.
Pump assembly is defective - Check pump and replace if necessary.
Leakage of manual release valve - Close the valve or change it.
Faulty pump driveshaft or motor - Change defective component.
| Trim does not fully up or down |
Pump assembly faulty - Change pump as required.
Tilt ram piston ball is displaced - Clean or repair.
Worn tilt ram piston O-ring - Install new O-ring.
Insufficient oil - Checking oil level and add if necessary.
Lower check valve not seating in port side trim ram - Install valve correctly.
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| Outboard Engines Technical Specifications |
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