Johnson Seahorse 35 Troubleshooting
| Engine Model: Johnson Seahorse 35 Hp |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 31.8 cu.in (0.52 L) |
| Rated Engine Power: 35 Hp (26 kW) at 4500 rpm |
| Fuel System: Downdraft carburetor |
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| Engine doesn't start or starts hard |
Gas tank is empty - Add gasoline.
Wrong grade of gasoline - Change gasoline.
Dirty fuel system - Check and clean.
Faulty spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Spark plug is damaged - Install new spark plug.
Fuel filter is clogged - Change fuel filter.
Wrong carburetor adjustment - Adjusting carburetor correctly.
Dirt in the fuel lines - Clean fuel lines.
Fuel tank air vent closed or restricted - Fuel tank air vent need to be opened or cleaned.
Fuel pump pressure is low - Change or rebuild fuel pump.
Damaged or worn fuel reed valve - Install new reed valve.
| Engine starts but stalls immediately |
Faulty spark plug - Change spark plug as required.
Faulty or dirty carburetor - Repair or clean carburetor.
Ignition coil is faulty - Ignition coil must be replaced.
Fuel tank air vent closed or restricted - Open or clean air vent.
Fuel pump pressure is low - Repair or change fuel pump.
Ignition failure - Inspect ignition system and change failed components.
Dirty or faulty fuel pump - Clean or replace fuel pump.
Carburetor is dirty - Wash, clean and adjust.
Fuel lines are dirty - Fuel lines need to be cleaned.
Closed or restricted fuel tank air vent - Fuel tank air vent need to be opened or cleaned.
Dirty fuel filter - Install new filter.
Gaskets are damaged - Change gaskets.
Excessive engine load - Reduce load.
Carburetor fuel mixture is too lean - Make the correct settings.
Wrong ignition timing - Set the ignition timing correctly.
Damaged thermostat - Change thermostat.
Damaged water pump - Change water pump as required.
Propeller pitch or diameter incorrect - Install correct propeller.
Damaged or bent propeller - Replace propeller.
Outboard engine is mounted too high or too low - Mount the motor as required.
| Abnormal engine noise or knocking |
Low octane fuel - Use proper fuel.
Engine overload - Load reducing required.
Incorrectly adjusted low idle speed - Correct idle adjustment.
Fuel pump is dirty or defective - Check fuel pump and replace if necessary.
Crankshaft or main bearings failure - Change defective components as required.
Worn cylinder bore or piston rings - Replace faulty parts.
Carburetor is dirty or incorrectly adjusted - Service or properly adjust carburetor.
Dirty or faulty fuel pump - Service or change fuel pump.
Defective ignition system - Check ignition system and replace faulty parts.
Gaskets are damaged - Change gaskets.
Powerhead components are worn - Defective parts need to be replaced.
Improper propeller diameter or pitch - Install correct propeller.
Damaged or improper size of propeller - Replace propeller.
Motor mounted at incorrect height on transom - Check the outboard engine mounting height.
Trim angle is incorrect - Adjust trim angle correctly.
| Engine using too much gasoline |
Incorrect carburetor main jet adjustment - Adjust it properly.
Defective or loose spark plug - Replace or tighten spark plug.
Sleeve, piston, or rings are damaged - Replace defective parts as required.
| Excessive motor vibration |
Damaged or bent propeller - Replace propeller.
Damaged propeller shaft - Have propeller shaft replaced.
Weeds clogs the propeller - Remove weeds from propeller.
Motor mounting bolt is loose - Tighten the bolt as required.
Damaged or loose steering pivot Tighten correctly or replace.
| Starter motor is not working |
Battery capacity is low - Battery is drained, recharge it.
Battery does not hold charge - Service battery or replace it.
Faulty battery terminals or disconnected cables - Check wire connections and change or service terminals.
Starter motor is damaged - Replace or repair starter.
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| Outboard Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Industrial Engines Technical Specifications |
