Mariner 150 Super Magnum problems
| Engine Model: Mariner Super Magnum 150 Hp |
| Engine Type: 2-stroke 6-cylinder gasoline outboard engine |
| Total Displacement: 153 cu.in (2507 cc) |
| Rated Engine Power: 150 Hp (111.8 kW) at 6500 rpm |
| Fuel System: Electronic fuel injection (EFI) |
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| Engine will not start or hard to start |
No gasoline in tank - Add gasoline.
Low-quality gasoline - Use correct fuel grade.
Air in fuel system - Bleed fuel system.
Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace.
Spark plug is defective - Spark plug need to be replaced.
Fuel filter is plugged - Install new filter.
Dirt in the fuel lines - Clean fuel system lines.
Discharged or faulty battery - Recharge or replace battery.
Damaged wiring harness connections - Check wiring harness connections.
Damaged ignition system - Replace defective components.
Faulty pulse fuel pump - Pulse fuel pump need to be replaced.
Electric fuel pump is faulty - Change electric fuel pump as required.
ECM failure - Replace ECM.
| Engine starts but then stalls |
Spark plug is faulty - Spark plug need to be replaced.
Ignition coil is defective - Ignition coil should be replaced.
Defective pulse fuel pump - Replace pulse fuel pump.
Fuel system is dirty - Fuel system need to be cleaned.
Plugged final fuel filter - Change final filter.
Electric fuel pump is faulty - Change electric fuel pump as required.
Ignition system malfunction - Test ignition and replace failed parts.
Fuel pump is dirty or defective - Test fuel pump and change if necessary.
Restricted fuel lines - Service fuel lines.
Fuel filter is dirty - Fuel filter needs changing.
Engine is under excessive load - Reduce load.
Incorrect ignition timing - Adjust ignition timing correctly.
Thermostat failure - Change thermostat.
Defective water pump - Install new water pump.
Low octane gasoline - Change gasoline.
Engine is running overloaded - Load reducing is recommended.
Incorrectly set low idle speed - Test and adjust.
Fuel pump is dirty or defective - Service or replace fuel pump.
Worn main bearings or crankshaft - Change defective components as required.
Worn piston rings or cylinder bore - Change defective components.
Dirty or defective fuel pump - Service or replace fuel pump.
Ignition system problems - Test ignition and replace failed parts.
Powerhead components are damaged - Change defective parts.
Stator, coil, or switch box defective - Replace damaged components.
Compression is insufficient - Correct.
Fuel delivery problem - Check fuel system.
Manifold fuel leak - Repair leaks.
Vapor separator is flooded - Normalize vapor separator functions.
| Engine uses too much fuel |
Spark plug is defective or loose - Spark plug need to be tightened or replaced.
Worn piston, rings, or sleeve - Change faulty parts.
Engine is running overloaded - Load reducing required.
Dirty or defective fuel injectors - Clean or change fuel injectors.
| Motor vibrates excessively |
Damaged or bent propeller - Have propeller repaired or replaced.
Damaged propeller shaft - Replace propeller shaft.
Weeds clogs the propeller - Remove and clean propeller.
Engine mounting bolt is not tightened - Tighten the bolt as required.
Steering pivot is faulty or loose - Tighten correctly or replace.
Propeller bent or damaged - Have propeller repaired or replaced.
Propeller shaft damaged - Propeller shaft needs to be replaced.
Weeds wraped around propeller - Remove and clean propeller.
Engine mounting bolt is not tightened - Tighten the bolt as required.
| Trim motor is running but system can't move |
Oil insufficient - Need to add the oil.
Pump assembly is damaged - Check pump and change if required.
Manual shut-off valve leaks - Close the valve fully or replace it.
Motor or pump driveshaft faulty - Change worn component.
| Trim does not fully up or down |
Defective pump assembly - Change pump.
Tilt ram piston ball is displaced - Clean or repair.
Damaged tilt ram piston O-ring - Install new O-ring.
Oil level is low - Need to add the oil.
Lower check valve is not properly secured in port side trim ram - Install valve correctly.
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