MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
Use an inline spark tester. Some models you can set the spark gap- set at 7/16 - 1/2". Some models use a zenon tube and are not adjustable.