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Old 05-15-2014, 07:32 AM   #1
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Detroit 6V92 owners - alternator setup

A while back I replaced my belt on my alternator on my 1990 6V92 550 hp DDs. I found that the way the alternators were installed it is extreemly difficult to change and the adjustment does not really have enough room to get the belt tight. It hits the engine mount before the belt is really tight. I tried a smaller size belt and cant get it on because of being too small. These are Johnson Towers DDs. The belt cover is almost impossible to remove because they mounted the oil filter to a angle steel across the front of the engine blocking the belt cover. Do any of you have this problem? If so how did you deal with it? I would hate to try to change a belt at sea with the arrangement I have. Any photos of alternate arrangements would be great. I would like to change this to more user freindly.
Thanks for you inputs!
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Old 05-16-2014, 07:35 AM   #2
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Lots of 6v92 owners on the Hatteras Owner's Forum and BoatDiesel.com if you don't get an answer here. Sounds like you have an unusual installation.
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Old 05-16-2014, 07:40 AM   #3
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Thanks George,
Yes Johnson Towers was very good at making getting to the oil filter very easily. Unfortunately it left servicing the belts a real PIA...... I have put the same question out on Boat Diesel and can try on the Hat board as well.
Have a good one!
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Old 05-16-2014, 08:37 AM   #4
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I've got the same engines in my blackfin. No safe way to replace a belt underway.Click image for larger version

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Port side starter is also a problem. All boats are a compromise.


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Old 05-16-2014, 10:05 AM   #5
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Yes, your photos are exactly what I have. I am thinking about cutting the bottom of the cover off and possibly put a bracket to the angle steel that holds the oil filter. And you also have the same situation on the alternator so close to the engine mount. Not to sure what I can do about that.... I probably have about a 1/2 inch between the edge of the pulley and the bolt...
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