What your mechanic
may be referring to, in perhaps poorly chosen words, is that theoretically, if you mount 2 alternators of the same size on an engine 180 deg. apart from each other, then the pull on the seals
& bearings in the engine from them is negated. Whereas if you have 2 alternators on an engine that are different sizes, & mounted obtusely in relation to each other, then they could cause some components in the engine to die prematurely. But as to how fast this "death" may happen I can't even begin to guess at.
I can't say that I know how factual the above statement, & theory is. But I've seen it in more than a couple of places. And it might be worth researching. Including on different forums
oriented specifically towards engines & such.
Though I do wonder about it's veracity a bit, given that in millions upon millions of cars, there are multiple belts on the engine for power take off, led at odd angles to various sized loads. Such as the AC compressor
, alternator, & water
pump, etc. Most of which exert a not insubstantial sideways loading on the power take off pulley. Yet these engines run for tens & hundreds of thousands of miles without issues from this. So then, are marine
diesels so much more fragile than these automobile engines?
I'm curious, is your mechanic one who works on boats a lot? So that he has enough depth
of knowledge from which to form conclusions like the above. If in fact that's what he's trying to tell you.
Also, I can't help but to wonder how some other diesels have their power take offs for other systems setup. Such as those on an 18-wheeler, whose engine has to power a multiplicity of heavy sub-loads.
If you find out much could you please
post it here on the forums
. It would likely benefit many of us. And a bibliography of relevant informational links would be great.
Edit: One thing which would definitely make sense, is to have two alternators that are parts
compatible with one another. That way if both of them go down in the middle of nowhere, then you may be able to cannibalize components from them in order to get one up & running.
, that engine of yours is so clean that it looks like a computer generated image, or a pic that's been "tuned" via photo