From all that I have been able to find out it is 0.040. I have a 100" and cannot find much info either.
What is the spark plug gap for a 9.9hp mercury outboard motor
The spark plug gap for a 2003 Mercury 125hp outboard motor is .040"
NGK BPR6HS-10 spark plug. Gap is .040
Johnson 6hp spark plug gap
If it has the 3.8L motor, then the spark plug gap is .060. If it is the 5.7L motor, then the gap is .050 (unless you are using AC rapidfire plugs, then it is also the .060 gap).
The recommended spark plug gap (per NGK) is .039"
spark plug gap for a 1996 mercury 30 hp outboard motor?
The spark plug gap for most Yamaha outboards is around .030 - 0.035in.
spark plug gap for 5.0 liter engine is 0.054 inches
According to my owners manuel the spark plug gap is 30
The 2004 Chevy Express 6.0 liter motor spark plug gap is .032. Most spark plugs will come pre-gapped from the spark plug manufacturer.
The spark plug gap is ( .044 inch )