I have a 2003 VMAX 3.1 l on the boat I just bought. I ran Mercury and Mariners in the past on different boats. I would like to know the difference between the two Yamaha motors?
I have a 2003 VMAX 3.1 l on the boat I just bought. I ran Mercury and Mariners in the past on different boats. I would like to know the difference between the two Yamaha motors?
HPDI is a direct injection motor...like an Optimax...
Your 3.1L OX66 is an EFI...
Both "like" oil a lot...however the fuel economy on the HPDI is better than the EFI, unless you run WOT all the time then they are about the same.
Love mine and runs like a dream.
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