Reference Source

200-300 HP 4-Stroke

For 200-300 HP 4-Stroke, brand is Mercury; spark plug is NGK ILZFR5B-11; gap is 0.040" (1.0mm), recorded from its source on 2026-08-05.

Brand
Mercury
Model / range
200-300 HP 4-Stroke verified
Spark plug
NGK ILZFR5B-11 verified
Gap
0.040" (1.0mm) verified
Sourceseasierra.com
Verified2026-08-05
Review by2028-08-04
DatasetOutboard motor service specifications by brand and model

What the source says

200-300 HP 4-Stroke | NGK ILZFR5B-11 | 0.040" (1.0mm)

— seasierra.com, retrieved 2026-08-05

Source

Last verified against source: 2026-08-05. Due for re-check by 2028-08-04. This page as Markdown · OKF bundle · full dataset as JSON.