Hummm.....from their web sites, looks like the 300 Yami is 561 pounds and the 300 Zuke is 615 pounds. Pretty even.
I agree, 150 gallons at a conservative 3 MPG is a lot of range. I've got a 144 gal tank because the PO did mostly grouper fishing on the west coast of Florida with an old OMC carbed engine, he needed LOTS of fuel to feed that pig. If I bought a new technology engine I would like to drop back to 100 - 120 gal.
Good luck!
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