Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Captain
Posts: 558
Registered: ‎08-20-2017

Re: Load on display below 100%

Throttle plates do not open all the way on a 75hp. They appear to open about 85 percent.
TPS voltage should go from .5 volts to 4 volts,
As I recall, a 3.5 volt increase in TPS voltage equals 100 percent. Most of the 75 hp engines do not make it to 4 volts. Some owners have made various adjustments to increase TPS voltage and throttle plate opening. I spent several hours adjusting mine on the water with various test runs. End result was a 1mph gain in top speed. Probably could have taken some spare gear off the boat and get the same increase.
Captain
Posts: 558
Registered: ‎08-20-2017

Re: Load on display below 100%

An outboard engine should not be run much above idle when the gearcases is not in the water.
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Skipper
Posts: 5
Registered: ‎08-26-2019

Re: Load on display below 100%

I was finaly able to do some testing on the water last weekend. Running the engine at constant WOT I manually pushed the TPS to the maximum position. The load-indication on the displey went from 81% tot 100% but there was no difference in RPM or speed. I guess there is no hidden power left in my engine and a new calibration of the TPS won't make any difference in performance.