10% rule for GPH for EFI 4 stroke?

[barcade134]

Does the 10% rule still hold for Electronic fuel injected four stroke outboard engines? I would think it would be at least a little more efficient.

 

[Fl_Richard]

Re: 10% rule for GPH for EFI 4 stroke?

Ok does 9% make you feel better? 10% is a rough rule but surprisingly accurate. And that is at WOT lower throttle settings will yield considerably better economy.

 

[barcade134]

Re: 10% rule for GPH for EFI 4 stroke?

There are lower throttle settings? I thought that was just wasted space.

 

[Fl_Richard]

Re: 10% rule for GPH for EFI 4 stroke?

My boat was equipped with the Johnson smart switch option. It's either full on or off... This alleviates all the extra dash space required by a full binnacle adn replaces it with two toggles - throttle on/off and gear F-N-R.

 

[Rancherlee]

Re: 10% rule for GPH for EFI 4 stroke?

WOT the efi 4 and dfi 2 strokes are roughly 8-9% and the old 2 strokes 10-12% so the rough 10% is accurate enough. Its the midrange and idle where the new engines shine.