thanks for the help guys. I find that the tough thing about this forum. there's few different motors, but every answer the post according to the their motor. have to sort thur things. little easier with chevy, only to different motors. Anyways. motor start great. even in cold new england. very little oil usage, but really been on it! " itlian tune up". I will have to open oil cover to see any blow by. impressed with torque. pretty quick for such a boat. Wiring harness goes to back of pump. can change idle with wiggle, but not enough to completely pin piont. injectors most likely need help. car very neglected. anyone with fuel shop in new england? another question plastic cup injector sits in . what is its purpose? is there a washer for a seal on injector?

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1992 300sd??
1996 1500 6.5(sold)
1995 3500 6.5
1991 2500 6.2