Spark Plug LMAR8F-9 - Nickel V-Groove | 4Boats

LMAR8F-9 nickel spark plug featuring a V‑groove centre electrode to improve ignitability in marine and outboard engines.

• Part number: LMAR8F-9
• Construction: Nickel electrodes for reliable spark delivery
• Electrode design: V‑groove centre electrode for improved ignitability
• Application: Designed for marine and outboard ignition systems
• Compatibility: Genuine NGK; verify fitment for your engine model - see our fitment guide
• Installation: Check electrode gap before fitting and follow engine manufacturer guidance for torque and installation procedure
• Recommended checks: Confirm thread size, reach, hex size, resistor status, heat range, gap and torque for your engine - refer to the fitment guide and OEM documentation
• Use: Routine maintenance & consumables replacement

Ideal for small- to medium-sized outboard motors and marine auxiliary engines, this plug helps deliver dependable starts in saltwater and freshwater environments. The V-groove centre electrode sharpens the spark energy distribution for improved ignitability and more consistent combustion, reducing misfires and improving throttle response. Inspect plugs during regular service intervals - typically every season or per your engine manufacturer's schedule - and replace sooner if fouling, corrosion or electrode wear is observed to maintain reliable operation and fuel efficiency.

Designed for marine and outboard use, replace according to your engine manufacturer's intervals or sooner if fouling or damage occurs. Inspect ignition components during routine service and replace plugs as part of matched maintenance where recommended.