newbie question on Volvo TAMD 71 s

[Muxey]

Hi i have no boat at the moment, looking at various options 1 is a fairline with Volvo 71s just wondering abot possible problems with them fuel consumption on a 14 met fairline if anyone runs one what kind of rpm is cruise? They wont be opend up too often.
Any advice welcome,

 

[Nauti Fox]

Hello there, I have 71B's in a Fairline 43-45 (46 ft)
I have never worked them out personally but these are the book figures, please remember that they will vary with weight, fouling and weather conditions. I normally go for between 1900-2100rpm in the cruise which gives me between 19-21 knots. For displacement I use 1100-1200rpm.
Per engine.
1100 rpm...10.1 lph
1400 rpm...19.3 lph
1700 rpm...29 lph
2000 rpm...37.25 lph
2300 rpm...49.4 lph
2600 rpm...78 lph.

 

[Muxey]

Thanks for the information that is helpful.
What rpm does it need to maintain it on the plane?
Any problems i should be looking for on a mid 1980 boat?
Regards Harvey

 

[volvopaul]

Thanks for the information that is helpful.
What rpm does it need to maintain it on the plane?
Any problems i should be looking for on a mid 1980 boat?
Regards Harvey

Corroded heat exchanger housing both the alloy outer and the tube stack especially the starboard engine as you can t see the bottom areas of the coolers .

 

[Nauti Fox]

Thanks for the information that is helpful.
What rpm does it need to maintain it on the plane?
Any problems i should be looking for on a mid 1980 boat?
Regards Harvey

Can't really say as I tend to stick to those settings, it does need the trim tabs fully down though or it will sit very bow high.

 

[Muxey]

Thanks, had to smile when I looked at your profile seeing you are a ducati fan , my raceing days are well over and just decided to quit track days so thr TT 1 has to go and make way for a boat ?

 

[Nauti Fox]

Used to race with Bemsee but was only a middling racer but found I was better at spannering and ended up working in various teams, now run a little independent Ducati workshop.