Troubleshooting Parsun F30/F40 Outboard Engine

Q: Parsun F30/F40 outboard air vent screw closed

Air vent screw on fuel tank is closed: Open air vent screw

Q: Parsun F30/F40 outboard carburetor adjustments incorrect

Carburetor adjustments are incorrect: Have serviced by your dealer

Q: Parsun F30/F40 outboard carburetor is clogged

Carburetor is clogged: Have serviced by your dealer

Q: Parsun F30/F40 outboard choke knob pulled out

Choke knob is pulled out: Return to home position

Q: Parsun F30/F40 outboard engine oil not specified type

Incorrect engine oil: Check and replace oil as specified

Q: Parsun F30/F40 outboard engine power loss

Air vent screw on fuel tank is closed: Open air vent screw Boat bottom is fouled with marine growth: Clean boat bottom Fuel filter is clogged: Clean or replace with recommended type Fuel is contaminated or stale: Fill tank with clean, fresh fuel Fuel joint connection is incorrect: Connect correctly Fuel pump has malfunctioned: Have serviced by your dealer Fuel system is obstructed: Check for pinched or kinked fuel line or other obstructions in fuel system Ignition parts have failed: Have serviced by your dealer Ignition wiring is damaged or poorly connected: Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires Motor is mounted at incorrect transom height: Adjust motor to proper transom height Propeller is damaged: Repair or replace propeller Spark plug gap is incorrect: Inspect and adjust as specified Spark plug(s) are fouled or incorrect type: Inspect spark plug(s). Clean or replace with recommended type Specified engine oil is not being used: Check and replace oil as specified Specified spark plug(s) are not being used: Check and replace spark plug(s) as specified Thermostat is faulty or clogged: Have serviced by your dealer Trim angle is incorrect: Adjust trim angle to achieve most efficient operation Weeds or foreign matter tangled on gear housing: Remove foreign matter and clean lower unit

Q: Parsun F30/F40 outboard engine vibrates excessively

Motor mounting bolt is loose: Tighten bolt Propeller is damaged: Repair or replace propeller Propeller shaft is damaged: Have serviced by your dealer Steering pivot is damaged: Have serviced by your dealer Steering pivot is loose: Tighten it Weeds or foreign matter tangled on propeller: Remove and clean propeller

Q: Parsun F30/F40 outboard fuel filter clogged

Fuel filter clogged: Clean or replace with recommended type

Q: Parsun F30/F40 outboard fuel is contaminated or stale

Contaminated or stale fuel: Fill tank with clean, fresh fuel

Q: Parsun F30/F40 outboard fuel joint connection incorrect

Fuel joint connection is incorrect: Connect correctly

Question 1

Parsun F30/F40 outboard air vent screw closed

Accepted Answer

Air vent screw on fuel tank is closed: Open air vent screw

Question 2

Parsun F30/F40 outboard carburetor adjustments incorrect

Accepted Answer

Carburetor adjustments are incorrect: Have serviced by your dealer

Question 3

Parsun F30/F40 outboard carburetor is clogged

Accepted Answer

Carburetor is clogged: Have serviced by your dealer

Question 4

Parsun F30/F40 outboard choke knob pulled out

Accepted Answer

Choke knob is pulled out: Return to home position

Question 5

Parsun F30/F40 outboard engine oil not specified type

Accepted Answer

Incorrect engine oil: Check and replace oil as specified

Question 6

Parsun F30/F40 outboard engine power loss

Accepted Answer

Air vent screw on fuel tank is closed: Open air vent screw
Boat bottom is fouled with marine growth: Clean boat bottom
Fuel filter is clogged: Clean or replace with recommended type
Fuel is contaminated or stale: Fill tank with clean, fresh fuel
Fuel joint connection is incorrect: Connect correctly
Fuel pump has malfunctioned: Have serviced by your dealer
Fuel system is obstructed: Check for pinched or kinked fuel line or other obstructions in fuel system
Ignition parts have failed: Have serviced by your dealer
Ignition wiring is damaged or poorly connected: Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires
Motor is mounted at incorrect transom height: Adjust motor to proper transom height
Propeller is damaged: Repair or replace propeller
Spark plug gap is incorrect: Inspect and adjust as specified
Spark plug(s) are fouled or incorrect type: Inspect spark plug(s). Clean or replace with recommended type
Specified engine oil is not being used: Check and replace oil as specified
Specified spark plug(s) are not being used: Check and replace spark plug(s) as specified
Thermostat is faulty or clogged: Have serviced by your dealer
Trim angle is incorrect: Adjust trim angle to achieve most efficient operation
Weeds or foreign matter tangled on gear housing: Remove foreign matter and clean lower unit

Question 7

Parsun F30/F40 outboard engine vibrates excessively

Accepted Answer

Motor mounting bolt is loose: Tighten bolt
Propeller is damaged: Repair or replace propeller
Propeller shaft is damaged: Have serviced by your dealer
Steering pivot is damaged: Have serviced by your dealer
Steering pivot is loose: Tighten it
Weeds or foreign matter tangled on propeller: Remove and clean propeller

Question 8

Parsun F30/F40 outboard fuel filter clogged

Accepted Answer

Fuel filter clogged: Clean or replace with recommended type

Question 9

Parsun F30/F40 outboard fuel is contaminated or stale

Accepted Answer

Contaminated or stale fuel: Fill tank with clean, fresh fuel

Question 10

Parsun F30/F40 outboard fuel joint connection incorrect

Accepted Answer

Fuel joint connection is incorrect: Connect correctly

Question 11

Parsun F30/F40 outboard fuel pump is damaged

Accepted Answer

Fuel pump is damaged: Have serviced by your dealer

Question 12

Parsun F30/F40 outboard fuel system is obstructed

Accepted Answer

Pinched or kinked fuel line or other obstructions: Check for pinched or kinked fuel line or other obstructions in fuel system

Question 13

Parsun F30/F40 outboard idles irregularly or stalls

Accepted Answer

Spark plug(s) fouled or of incorrect type: Inspect spark plug(s). Clean or replace with recommended type

Question 14

Parsun F30/F40 outboard ignition wiring damaged

Accepted Answer

Ignition wiring damaged or poorly connected: Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires

Question 15

Parsun F30/F40 outboard motor angle too high

Accepted Answer

Motor angle is too high: Return to normal operating position

Question 16

Parsun F30/F40 outboard spark plug gap is incorrect

Accepted Answer

Incorrect spark plug gap: Inspect and adjust as specified

Question 17

Parsun F30/F40 outboard starter will not operate

Accepted Answer

Shift lever is not in neutral: Shift to neutral
Starter components are faulty: Have serviced by your dealer

Question 18

Parsun F30/F40 outboard thermostat faulty or clogged

Accepted Answer

Thermostat is faulty or clogged: Have serviced by your dealer

Question 19

Parsun F30/F40 outboard throttle valve adjustment incorrect

Accepted Answer

Throttle valve adjustment is incorrect: Have serviced by your dealer

Question 20

Parsun F30/F40 outboard will not start (starter operates)

Accepted Answer

Engine inner parts are damaged: Have serviced by your dealer
Engine stop switch lanyard is not attached: Attach lanyard
Fuel filter clogged: Clean or replace with recommended type
Fuel is contaminated or stale: Fill tank with clean, fresh fuel
Fuel pump has malfunctioned: Have serviced by your dealer
Fuel tank is empty: Fill tank with clean, fresh fuel
Ignition parts are faulty: Have serviced by your dealer
Ignition wiring damaged or poorly connected: Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires
Spark plug cap(s) fitted incorrectly: Check and re-fit cap(s)
Spark plug(s) fouled or of incorrect type: Inspect spark plug(s). Clean or replace with recommended type

Possible Reason	Recovery Action
Air vent screw on fuel tank is closed	Open air vent screw
Boat bottom is fouled with marine growth	Clean boat bottom
Fuel filter is clogged	Clean or replace with recommended type
Fuel is contaminated or stale	Fill tank with clean, fresh fuel
Fuel joint connection is incorrect	Connect correctly
Fuel pump has malfunctioned	Have serviced by your dealer
Fuel system is obstructed	Check for pinched or kinked fuel line or other obstructions in fuel system
Ignition parts have failed	Have serviced by your dealer
Ignition wiring is damaged or poorly connected	Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires
Motor is mounted at incorrect transom height	Adjust motor to proper transom height
Propeller is damaged	Repair or replace propeller
Spark plug gap is incorrect	Inspect and adjust as specified
Spark plug(s) are fouled or incorrect type	Inspect spark plug(s). Clean or replace with recommended type
Specified engine oil is not being used	Check and replace oil as specified
Specified spark plug(s) are not being used	Check and replace spark plug(s) as specified
Thermostat is faulty or clogged	Have serviced by your dealer
Trim angle is incorrect	Adjust trim angle to achieve most efficient operation
Weeds or foreign matter tangled on gear housing	Remove foreign matter and clean lower unit

Possible Reason	Recovery Action
Motor mounting bolt is loose	Tighten bolt
Propeller is damaged	Repair or replace propeller
Propeller shaft is damaged	Have serviced by your dealer
Steering pivot is damaged	Have serviced by your dealer
Steering pivot is loose	Tighten it
Weeds or foreign matter tangled on propeller	Remove and clean propeller

Possible Reason	Recovery Action
Shift lever is not in neutral	Shift to neutral
Starter components are faulty	Have serviced by your dealer

Possible Reason	Recovery Action
Engine inner parts are damaged	Have serviced by your dealer
Engine stop switch lanyard is not attached	Attach lanyard
Fuel filter clogged	Clean or replace with recommended type
Fuel is contaminated or stale	Fill tank with clean, fresh fuel
Fuel pump has malfunctioned	Have serviced by your dealer
Fuel tank is empty	Fill tank with clean, fresh fuel
Ignition parts are faulty	Have serviced by your dealer
Ignition wiring damaged or poorly connected	Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires
Spark plug cap(s) fitted incorrectly	Check and re-fit cap(s)
Spark plug(s) fouled or of incorrect type	Inspect spark plug(s). Clean or replace with recommended type

Parsun F30/F40 Spare Parts and Exploded Diagrams

Find Commonly Needed Parts

Water-pump and impeller parts

Fuel-system parts

F30/F40 service shopping list and oil quantities

Select an Engine Assembly

Appendix 1

APPENDIX 2

APPENDIX 3

BOTTOM COWLING

BRACKET 1

BRACKET 2

BRACKET 3

CARBURETOR ASSEMBLY

CONTROL BOX

CONTROL SYSTEM 1

CONTROL SYSTEM 2

CRANKCASE

CRANKSHAFT AND PISTON

CYLINDER

CYLINDER HEAD ASSEMBLY

ELECTRIC 1

ELECTRIC 2

ELECTRIC 3

ELECTRIC 4

ELECTRIC FUEL PUMP

FUEL COMMON RAIL

FUEL SYSTEM

INTAKE SYSTEM 1

INTAKE SYSTEM 2

LOWER CASING AND DRIVE 1

LOWER CASING AND DRIVE 2

MANUAL TILT

OIL PAN ASSEMBLY

OIL PUMP

PORTABLE FUEL TANK

POWER TRIM AND TILT ASSEMBLY

STARTER

STEERING SYSTEM

TOP COWLING ASSEMBLY

UPPER CASING

VALVE

Manuals