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fuel consumption

what mileage approximately should i get per litre of diesel with an isuzu 42 hp engine

Asked by: andy seymour  | 5.41pm, Thursday 11 June

WW says:

This is quite difficult to quantify! Most modern narrowboat diesel engines use between 1.5 and 2.5 litres of duel per hour, but the mileage per litre depends on how fast you cruise, how long you spend in locks, how much time the engine is just idling, but probably 1 or 2 miles per litre might be a reasonable figure. Cruising faster on rivers uses more- as does shallow waters, the fouling of the hull with weed and any oddments collected arond the prop. The length, mass and shape of the boat also dramatically affect the ease which the engine can power the boat.
The size of propellor fitted, as well as the gearbox, number of alternators fitted (and what load they are subjected to) also make a big difference, so unfortunately, we cannot really give a definate answer!
You can download a fuel consumption graph from the manufacturers website, but they are not always that helpful in determining actual "MPG" for boats.

Mark Langley  | 12.33PM, Friday 12 June

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