Tranona
Well-Known Member
When my brain is working properly - that is just not the case. A Beta 28 which is what concerto has will average just under 2l an hour when cruising at 2400rpm when it produces around 18hp. Your Beta 14 will use half that - under 1l hour.A lot of people seem to think their engine uses x litres per hour.
The reality is, that 'x' is hugely variable according to how fast you go and whether there's a head wind or some chop to drive through.
'motor sailing' can vary from half a litre per hour when the sail is doing most of the work, to 2litres or more when the prop is doing all the work and the sail is really just damping rolling from the waves and swell. It can be absorbing several kW.
As it's late season, a lot of boats are draggy with growth, that can easily be a few HP.
A typical diesel uses about 0.22 litres per hour for every HP it's producing.
That's a matter of the energy in the fuel and the efficiency of the engine.
Clean hull flat water, not making waves, might only be 2HP of load on the engine.
It soon escalates from there!
My 14HP Beta can develop about 9HP at 2400 rpm, so could use 2 litres an hour without trying.
I have good records for my Volvo 2030 over several hundred hours of "normal" mixed use of under 2l and similar for my Nanni 14 (same engine as yours) in another boat at under 1l hour.
Sure your Beta will burn more if you run at over 3000rpm constant, but not at 2400.
