# Older 2-Stroke — Outboard motor service specifications by brand and model

For Older 2-Stroke, brand is Johnson/Evinrude; spark plug is Champion QL77JC4; gap is 0.030" (0.8mm), recorded from its source on 2026-08-05.

- **Brand:** Johnson/Evinrude
- **Model / range:** Older 2-Stroke _(verified: appears in the quote below)_
- **Spark plug:** Champion QL77JC4 _(verified: appears in the quote below)_
- **Gap:** 0.030" (0.8mm) _(verified: appears in the quote below)_

## What the source says

> Older 2-Stroke | Champion QL77JC4 | 0.030" (0.8mm)

## Source

- https://seasierra.com/blogs/outboard-101/outboard-spark-plug-replacement-the-right-plugs-and-gaps

Last verified: 2026-08-05. Review by: 2028-08-04.
Part of [Outboard motor service specifications by brand and model](https://referencesource.org/outboard-motor-service-specs/).