GM 6-71 Gray Marine Info

Author Message   everlong New member Username: everlong Post Number: 1 Registered: 06-2025 Posted on Wednesday, June 25, 2025 - 06:24 pm:        I have a 1967 US Navy LCVP with a GM 6-71 Gray Marine diesel engine. I am told that the engine is a lot older than the boat, I would like to know what year it was made and if possible, what its original purpose was. Serial no.-6A33871 Model no.-671RC41 Gray Marine is stamped on the front of the motor and GM General Motors is stamped on the side of the block. Any help would be much appreciated.

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