$3.94 off RRP of $78.75
Marine Spark Plugs
Filters
Show Filters
(183 Results)
$5.17 off RRP of $103.35
$3.33 off RRP of $66.60
$3.33 off RRP of $66.60
$3.33 off RRP of $66.60
$2.99 off RRP of $59.85
$5.70 off RRP of $113.95
$6.99 off RRP of $139.90
$7.12 off RRP of $142.45
Marine spark plugs are replacement ignition components for suitable outboard and petrol marine engines. They are commonly checked or replaced during routine servicing, seasonal preparation or fault diagnosis. The correct plug must be matched to the engine make, model and manufacturer specification different engines have different requirements for plug type, heat range, thread, reach, terminal style and electrode gap. Check the engine manual and existing plug reference before ordering, and use a qualified marine mechanic where required for installation or diagnosis.
Matching Plugs to Your Engine
Spark plugs may appear similar but heat range, thread diameter, reach length, electrode type and gap setting can all differ. Using a plug that does not match the manufacturer's specification may affect starting, running or longevity. Always cross-check the existing plug number and the engine manual before purchasing.
For broader engine servicing, also review marine engine accessories, suitable marine engine oil, marine fuel filters and marine engine strainers as part of the same service interval.
Replacement and Service Notes
Plugs are inspected for fouling, wear and corrosion during routine servicing or seasonal preparation. Even plugs that appear functional benefit from replacement at the manufacturer's recommended interval. In Australian saltwater conditions, moisture, salt air and variable temperatures can affect plug condition over time. Follow engine manufacturer service schedules, replace in matched sets where possible, and use a qualified marine mechanic where installation or diagnosis is uncertain. Marine spark plugs do not guarantee engine performance; persistent running issues may have multiple causes requiring broader diagnosis.
Marine Spark Plugs FAQ
How do I know which marine spark plug I need?
Check your engine manual for the specified plug part number or type, and compare the existing plug reference number with the product listing. Confirm heat range, thread diameter, reach, terminal style and gap requirements match the engine specification.
Are marine spark plugs different from automotive plugs?
Some marine engines use specific plug types. It is important to match the plug to the engine manufacturer's requirements rather than assuming an automotive plug with the same appearance is suitable. Follow the engine manual and check product specifications.
When should spark plugs be checked or replaced?
They are typically checked during routine servicing, seasonal preparation or when diagnosing starting and running issues. Replacement intervals depend on engine manufacturer guidance and operating conditions follow the service schedule rather than replacing only when a problem is visible.
Can replacing spark plugs fix poor engine running?
Worn or fouled plugs can contribute to ignition problems, but fuel delivery, compression, ignition timing and other systems may also be involved. If the engine issue persists after plug replacement, seek diagnosis from a qualified marine mechanic.
Should spark plugs be installed by a qualified mechanic?
Many experienced boat owners replace spark plugs as part of routine servicing, but the correct tools, torque settings and procedure should be followed. Use a qualified marine mechanic where the engine type, installation or fault diagnosis is uncertain.
read more
