I got one electromaax serpentine kit to test out on our Portside 3YM30
a year or so ago. Beautiful gear
But alas, once all installed, the pulley for the alternator was 5mm further out than the crank pulley and water
pump pulley. The alternator has no movement fore/aft so I couldn't get good alignment. (3.15" saddle mount) Their suggestion when emailed was to purchase
one of their alternators or machine the pulley down. I didn't actually need a larger output alt, was just tying to reduce belt dust.
I thought that I had read on their website recently that they now have two different pulleys but I can't find it again. Anyway, after numerous emails with no reply, I gave up and reinstalled the original pulleys.
I'm sure the serpentine belt would help stop belt wear but with the stock 80A hitachi, you would have to muck around a bit to get all pulleys aligned. (Unless the design has changed)
I see that the new 3YM30AE now has serpentine belt and larger alternator
So if going down the electromaax serpentine belt road for a 3YM30
and keeping the stock alternator, get confirmation that it now fits.
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