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.
You are out of luck.
Cummins RECON program (the best new diesel deal in the market) no longer produces the 4BT/BTA.
You'll need to look at yanmar or volvo for 4 cylinder diesels.
Bill D