Another FUEL CONSUMPTION question for you boating gurus

[Smithy]

My experience of the 115 size OMC Oceanpros is 1km/litre. The old 90 degree block Johnrude series 85-90-115-120-130-140s and the newer OMC 150-175-225 Oceanpro series only get worse from there.

[wessel]

In my opinion, every boat has a sweet spot. That area where you are burning optimum fuel for the speed being travelled versus the sea conditions and lastly your inner childhood hooligan tendencies.

A drop in rpm by as little as 500 can have a dramatic effect on your fuel consumption figures. The gain in speed is just not worth the extra petrol required to have that magical little number appear on the GPS screen. So, you are doing 47 km/h. Why do we always listen to that little inner hooligan voice and open the throttle that little bit more just to see the dial reading 50 km/h?

Have fun

Wessel

[whiteman]

Jeff the navman unit whities talking about can be calibrated to most motors, but I think you still have to buy a chartplotter to use as the screen ????????
Ta

Navman sell a model that includes the readout module.
http://www.navman.com/Navman/Templat...____28780.aspx

[SgBFish]

No Fear I hope you catch a lot of fish!
160L of juice for a trip is a lot.
My F115 Yamaha DFI 4 stroke gets 10% better fuel economy than the 115 optimax. Around 16L /hr @ 4000 rpm.

[rockstar]

i have a 6.3m whitley with a 175 johnson (2000) and at worst it does 1km per 1l and that is on about 4000rpm and at best it can get around 1.5-2km per 1l. the fuel flow meter are a great investment to get they tell you how much fuel you are burning and with a few adjustments you can save a fear bit of fuel. so i reacken you should get one of them

cheers

rocky

[jeffrey_h]

Thanks Saurian & Whiteman,
I have a Lowrance 339 df iGPS that will take the fuel sensor and tank guage.
I checked their site today and built the system on their test screen that you can use. Will visit Bias at Tingalpa soon to get them. I know that it will pay for itself in a short time.


Jeffrey