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.
Sounds like you have a UD Nissan V8. A Jap copy of the GM diesel.
Chryler as far as I know nver used this engine.