Fuel consumption seems good on the 140 4s -
suzuki DF 140
edit: goto www.suzukimarine.com
and the american Suzuki site has tests which show you the fuel consumption figures at different speeds across the range of their engines.
At around 160hrs, my engine is still starting first time every time (as it should do), running very quietly, and is smooth as anything when running at higher revs.
Just reading rib international at breakfast, they have an article about new Suzuki guages which seem to be catching up finally to about the same sort of data as the smartcraft stuff you get with mariner/mercury engines - maybe worth investigating that if you're getting a new one (more gadgets to play with!!).