300 HPDI on a 23' CC

[sinan]

I have a 2004 300 HPDI on my Seacraft 23, I get 13 gph at 3900 rpms for a crusing speed of ~24 knots. Above 4200 rpms speed will go up to 27 knots or so but gas mileage gets expensive, about 17 or 18, spark plugs are a massive deal, i change them about every 75 hours or so, PM me if you need more info