Harry Krause wrote:
K. Smith wrote:

Butch Davis wrote:

Diesel engine manufacturers know and publish very accurate fuel
consumption data. Competition keeps them honest.



Agreed & that's exactly why Yanmar "aren't" making this claim,
some seller & dreamers' magazine are.


A given engine in good tune will burn a given quantity of fuel at a
given load or power level. Load being a factor of speed vs weight
generally.

Lot's of conditions contribute to load on a boat. Windage, bottom
condition, type of water, altitude, temperature, etc. That's why
data is generally published for a standard set of conditions.

Manufacturers sometimes have the benefit of testing fuel consumption
for a specific hull under varying conditions. They often publish the
findings. Boat builders often share the data if favorable to them.
The potential liability for publishing false data is sufficient to
keep just about everyone honest.

So now you're saying that the magazines don't actually "test"
diesel??? OK progress at last!!! They certainly word their claims
like they already know they're suspect numbers, the infamous
chuckster's "about" gallons, in his world they must be huge, how many
litres in a chuckster gallon??? or gees louise I suppose there's
chuckster litres there too??:-)

In my previous life I was a PM for the construction of a towboat. We
opted for large twin Cats. Cat predicted with very high accuracy
exactly what fuel consumption we would have with the engines.



Yes that's true & I'm well familiar with fuel consumption of
marine diesels that's why when just strolling past the thread I near
fell over.

So now all you or anyone need do is find a proper Yanmar link
which claims anything like 315HP on 11 usgal/hr, I can't but hey Butch
you bought a Ficht so I'm sure you'll lead us all to one in a jiff.



http://www.yanmarmarine.com/products..._TechnData.pdf


The URL listed above shows the 315 hp Yanmar produces about 250 hp at
3400 rpm and burns around 11 gph. The max rpm for the engine is 3800
rpm, but only an idiot would run that diesel higher than cruise for
sustained periods.

Thus, the engine under whatever standard conditions are for it burns 11
gph at a high cruise rpm.

See this is where you lying idiots confirm your total lack of actual
boating experience.

Now it seems you can't even read!!! the link you proffer is for a
248-260HP engine NOT a 315 HP engine!!! You really are the most stupid
lying uneducated & uneducatable person I've ever come across Krause:-)

Even a small drop in revs is a huge drop in power & so now you are
saying that this engine burns 11 usgal/hr at "cruise".

This confirms the magazine dreamer claims are & always were just
marketing BS!!! The claim was 6-7 gal/hr at 22 cruise & only 11 gal/hr
at a 40 mph max. Max means no more, flat out, WOT, that's it.

So again still no claims from Yanmar on the subject engine because they
know they wouldn't get away with it:-) Just as you & your simpleton
mates haven't here in this thread.

K