Suzuki Outboard NGK Spark Plugs

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Unlike some manufacturers that sell rebadged spark plugs under their own brand, Suzuki specifies NGK spark plugs by NGK part number as the factory-correct plug for every DF engine. NGK has been Suzuki's spark plug supplier for decades, and the part numbers stamped in your owner's manual are genuine NGK plugs manufactured to NGK's standard specifications for heat range, electrode material, and gap. Boat Max Online stocks the NGK plug part numbers specified for Suzuki DF engines, from the small DPR6EA-9 style plugs used in portable outboards up to the higher heat-range plugs required by the supercharged DF350A. Buying the exact part number Suzuki specifies, rather than a generic 'marine' plug, ensures the correct heat range for your engine's compression and load characteristics, which directly affects starting, idle quality, and protection against pre-ignition under heavy load. As an authorized Suzuki dealer, we sell genuine NGK plugs sourced through authorized distribution, not gray-market plugs of uncertain origin. Free shipping on orders over $499 to the lower 48 states. NGK Plug Reference by Engine Family Engine Family NGK Plug Type Gap Replacement Interval DF2.5 / DF4 / DF5 / DF6 DPR6EA-9 0.9 mm 100 hrs / annual DF9.9 / DF15 / DF20 / DF25 / DF30 DPR6EA-9 0.9 mm 100 hrs / annual DF40 / DF50 / DF60 DPR6EA-9 0.9 mm 100 hrs / annual DF70 / DF80 / DF90 / DF100 DPR6EB-9 0.9 mm 100 hrs / annual DF115 / DF140 / DF150 DCPR6E 0.8 mm 100 hrs / annual DF200 / DF225 / DF250 / DF300 DCPR6E 0.8 mm 100 hrs / annual DF350A (supercharged) Iridium DCPR7EIX 0.7 mm 100 hrs / annual