Max RPM for Evinrude 110

[zone 5]

A friend just bought a boat with a 1987 Evinrude 110 HP motor on it. We want to make sure its proped correctly, so we are looking for what OMC recommended the WOT rpm be.<br /><br />Thanks!

 

[walleyehed]

Re: Max RPM for Evinrude 110

Welcome aboard!<br />When this engine was designed, we had a much higher quality of fuel available, unlike today, and the recommended range was 4500-5500.<br />We've found over the years that due to the lower quality fuel (don't confuse this with lower octane) the engines are lasting longer, with less build-up if we prop them for around 5800RPM, even 6000 with a normal load. 5500RPM would be the minumum RPM you would want for best engine life.

 

[zone 5]

Re: Max RPM for Evinrude 110

Thanks!!! It is turning 6000 now, so I guess that we are correct with the prop. Interesting that with lower quality gas, that we can turn a higher RPM.

 

[Dhadley]

Re: Max RPM for Evinrude 110

It has to do with combustion temps and engine life.