It is probably a custom OEM part for which there are no datasheets and no replacements. They do this on purpose to frustrate do-it yourself repairmen. For the company there are liability issues for equipment that is not repaired in a factory authorized manner. Can you contact the manufacturer of the generator?I have a diesel marine generator that has a couple of bad diodes. I need to get replacements. I am looking for a replacement for a 6QD4.That # doesn't come up anywhere I search. I would appreciate any help.
I'm having the same problem. What where the numbers you found? Can you give me some leads?I actually found them last night.The production numbers have changed three times since it was new.it took several hours of research. Thanks to everyone for trying to help.
I have a similar diode. It's base the same aarow mark with 4 A next to it, and 6QD4 under it.Can you be more specific.For instance,do you need the exact same diode?Or do you have a similar generator?
by Aaron Carman
by Jake Hertz