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SUBJECT: # 37692: GM Diesels in Sportfisher's.
Submitted by Capt Larry (172.166.227.87) from NEW JERSEY on 7/9/02 8:01:00 AM
Im looking at a slightly used Ocean thats in great shape cosmetically. But im a little concerned about the engines. I havent heard much on GM diesels and dont have that much knowledge of them. Anyone have any input that would help i'd appreciate it. The boat has 750 hrs on engines and claims to be in top shape. Thanks for your input as usual. Later Capt Larry
- 7/9/02 10:42:00 AM
Submitted by
S Adams (65.112.215.130) from NEW JERSEY says GM = Detroit
I believe GM diesels are Detroits packaged under a different name. What do you have GM6-71's, its just a detroit 6-71. Never buy a boat without a boat survey and more importantly an engine survey, two very different surveys. An engine surveyor will do compression tests on each cylinder and will be able to tell you the condition of the engines. With the GM's make sure to check the last time the heat exchanger was pulled and cleaned, last time water pumps were changed, if its a wet turbo the last time the elbow was changed. If you stay on top of those issues and it has good compression they will last as long as you.
- 7/10/02 1:23:00 PM
Submitted by
joc (151.196.188.239) from DELAWARE says detroit diesels
Oh yes,I remember them well.Back in the '70s I had several in heavy trucks.Both inline 6-71's and "double breasted" 8v-71 models.They were noisy,smokey,no power,oil leaking,fuel hogging,two cycle diesels.Other than that they were pretty good powerplants.Especially the 6-71.It was more reliable,easier to work on,and cheaper to maintain than anything else I had.In short,they put money in the bank.And I had 3406 cats,1693 cats,and 855 cummins in various configurations.As far as a pair of 6-71's in a boat,I think that if they're in decent shape now then all you have to do is maintain them properly and your granchildren will be using them to catch fish years after you're gone.If these are the big 12v-71's they'll cost a lot more to feed and care for.Just remember these are old technology and they're definately not high performance but should offer a lot of bang for the buck.
