Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 78Get this manual

3Inspection Items 1) Inspection of Compression Pressure
1Start and idle engine for minutes to warm up, and then stop23Shift gear into neutral (N)Remove lock plate (of stop switch lanyard) from stop switch
CAUTION
To prevent accidental start of the engine, remove lock plate (of stop switch lanyard) from stop switch before measuring compression pressure4Remove plug cap and then spark plug
CAUTION

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives