On Jun 25, 5:20*pm, "KØHB" wrote:
OK, I've had several more outings since the first post, and this increase is
REAL. I consistently get 200-300 more RPM's and a corresponding increase in GPS
MPH. This is with the boat fully loaded, all equipment, full of fuel, etc..

Absolutely nothing has changed in this rig except for the 3-year maintenance
(which included reflashing the firmware.

I'm considering a more aggressive prop!

Hans/MN
--

Come sit by the fire and warm your bones. Share a bracing drink and a few tales.
"The wind was picking up, the bite was cold, my hands were numb, nose was
running, I had to pee, and I was thinking of heading for the dock, when....."

I agree, it probably has a lot/everything to do with the firmware
upgrade. These engines now are as advanced as some of the port fuel
injection systems I used to work on. When you have digital control of
fuel and air, a lot can be done with software/firmware to increase
performance. I wonder if the factory guys did a bunch of testing over
the years and found that they could run them at a higher RPM than
origionally specs would have suggested. Of course all of this suggests
that if you could dip into the board, you could make on the fly mods
of your own like the black boxes sold for diesel trucks and gasoline
hotrods.