random question about fuel useage -

[ollyit]

quick question - I know its going to be rough, and what with the factors against tides, wind etc

what sort of Gallons per hour can I expect from my yamaha 60 2 stoke, pushing my Avon Searider 4metre
sensibly driving, just to get to fishing spots in the solent - all opinions welcome - thanks

Regards I've got a external 25litre Quicksilver tank with a guage , will I need another?

Olly

[Alan]

Rule of thumb for old tech 2 strokes is summat like 9gph per 100hp at Wide Open Throttle (WOT). So for you around 5gph at WOT. Go at 3/4 throttle and obviously things will be better. Since you don't say how far you will be going to your fishing spots can't really say whether 1 tank is big enough! I would probably carry at least a 5l spare can cos you can never have enough fuel!

[Tim M]

1.5 miles per litre as a guide I would think. I would get another tank if I were you just in case.

[Rupert Bear]

I get a mile per litre with my Yam 60. Basically I found that I use 23lt per hour running as the manual says the only difference being speed.
Empty I get 30knts and 23lt an hour
Full I get 24knts and 23lts an hour.
The engine consumption doesn't change but the distance covered does. this is all at WOT, I found it didn't make any difference over cruising at 3/4.

[ollyit]

thank you all for your replies, plenty to think about now

[Matt]

Yeh, I was going to post the approx 1gph/10hp figure, but I couldn't remember if it's us or imperial gallons. DOH!

[LURCHER]

For what its worth we did approx 45 miles on just under 50 lt at 4000 ropm which was about 24 mph with a 115 Evinrude Fitch .

[codprawn]

Boats use massive amounts of fuel - a typical Rib seems to do about 3mpg - a Spitfire used to use 5mpg at 395mph!!! not bad for a 27 litre V12.

A recent Sunseeker I went on used 5000 litres of fuel to do 300 miles - thats 3.6 gallons per mile!!!!

Some very large ships use 100 gallons per mile - but considering they are moving 250,000 tons that isn't too bad - boats like the Sunseeker are so inefficient it's scary - nice though!!!!

[ollyit]

right thats it, im getting another 25 litre jobbie

[TIM]

OUr Rib uses, 40l hr wot @36knots and about 25i hr @ crusing at 27knots 4,000rpm

Cruse ship I was on, uses 200 l per min at 25knots or aprox 10 tons and hour !!!

[Nemo]

My Searider with its 2 stroke Yamaha 50hp does about 1ltr per nautical mile. its abuot the some what ever the load.

Graham