A testimonial from the owner:

Finally deciding to repower from gas to diesel, my choice was the Yanmar 230 horsepower [4LHA-STE] it seemed to be the perfect application for my vessel named the Bottom Line, a 28' Aquasport; I use her daily for sport fishing charters during the summer months.  I was skeptical at first.  Here I am replacing a 330 horsepower, 8 cylinder gas engine with a 230 horsepower, 4 cylinder diesel, would I get the same performance?  And cut my fuel expenses to less than half?  I wasn't sure but the folks at Oldport Marine assured me I would.  With that in mind the Bottom Line was repowered in the fall of 2001 at the Oldport Marine facility in Newport , RI .  After completion the Bottom Line was like a new boat; the speed and torque produced by the 230 horsepower was second to none with a cruising speed of 17.5 knots at 3000 RPM fully loaded and burning only 8 gallons of fuel per hour.  By the end of the 2003 fishing season I had tripled my traveling range. Bottom Line has logged 2200 hours on the Yanmar 230 horsepower [4LHA-STE] without a problem, just routine maintenance oil changes, fuel filters, and engine zincs to date.  In just two seasons I saved over $15,000 in fuel costs going from gas to diesel  My fuel bill for gas annually was $10,000 to $11,000; with the diesel it is under $3000.  What can I say?  In two more seasons the diesel will have paid for itself in just fuel saving.

Kudos to Yanmar and the folks at Oldport Marine! 

Capt. Fred Bowman