Quote:
Originally Posted by Comodave
Keep in mind they are Volvos...
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Fuel consumption is not affected by brand name.
Look at the wave you are making. If you want better fuel consumption, make a smaller wave. It really is that simple.
I run at 8 knots almost all of the time. My fuel consumption improved when I updated my engines from TMD40s to TAMD41s, and further when I overpropped to run closer to the sweet spot at 8 knots.
Those things can be done with any brand name and will get the same results.
At 8 knots, wave no more than 1ft tall, 44000lb of Semi Displacement in 44 feet, I get a consistent 2 nmpg.
Those engines should go 10000 hrs before a major rebuild, so long as you look after them and don't have any catastrophic failure along the way.
When I sold my TMD40s, they had close to 5000 hrs. The fisherman who bought, was happy to pay my asking price without trying to negotiate me lower.