Log in
Article search:

Q & A

Watermota fuel consumption

Hi anyone any idea of average/typical fuel consumption of my Watermota sea wolf, 1100CC crossflow petrolengine.

Asked by: laurence  | 6.15pm, Thursday 7 June


WW says:

The petrol consumption will obviously vary with speed. I have been unable to find any specific figures but the fuel consumption will be higher than an equivalent sized diesel engine. I would budget on around 2 litres an hour on canals and more at higher river speeds; however this is just a guesstimate!
Since petrol can be hard to obtain on the canal network you might be tempted to carry spare fuel. Use proper containers and store them in a ventilated compartment with a drain overboard or in an open location. This will prevent any petrol vapour collecting in the cabin with the associated explosion risk. Also regularly check the fuel system for any damage or leaks as the fire risks are higher on petrol boats.

Rupert Smedley  | 10.24AM, Friday 8 June

I would also add- as most of these engines are getting on a bit, they do leak petrol vapour. Although it's not part of your question, it might be worth considering a few things... a spark-proof extractor fan, ducted to suck from the base of the compartment and vented overboard can help disperse any petrol vapour- which, as denser than air, will collect in the bilge.
#
Also, consider fitting an automatic extinguisher- dry powder automatics are quite cheap (a 1 or 2kg unit would suffice) and although messy, can suppress a fire quickly.
#
As it wasn't standard fitment to most boats at the time of Watermota installations, you might find adding a "fire port" a good idea. A hole into the top of the engine compartment- ideally on a vertical surface- plugged normally or covered with a flap- to allow you to discharge a manual extinguisher into the engine space without opening the main hatch- which can (and will) make any fuel fire worse if you suddenly supply it with more air. You might also consider carrying a 2 litre foam spray extinguisher- which as well as being useful on all Boat fires, can be applied to split fuel to prevent ignition- such as if you have a fuel tank split.

Mark Langley  | 1.08PM, Saturday 9 June


Readers say:

Thanks like you I Ghent been able to fiddle any info. I know these things have so many variables but thanks for your guesstimate

laurence  | 11.42AM, Friday 8 June

You must log in to post an answer.