Yamaha 155hp 4 stroke questions 2011

[newarkboater]

I have been told that on the new yamaha 4 strokes that they have a sensor/governor that will not allow them to over-rev and limits the RPM?s.

Is this true?

If not what is max rpm?s for a 115 hp? I looked through the owners manual and can not find anything.

 

[boscoe99]

Re: Yamaha 155hp 4 stroke questions 2011

Maximum RPM for your motor is 6000 RPM.

Yes, there is over rev protection built into your motor. It should never be needed. If you have a tachometer in front of you and the throttle in your hand that is.

 

[newarkboater]

Re: Yamaha 155hp 4 stroke questions 2011

Thanks I am new to this whole boating life and was reading last night and someone mentioned over-reving and I remember when they sold me the boat they said you can’t hurt the engine, it wants to run wide open.

Then I read about over revs and starting thinking I may have been messing up the motor and not knowing it.

The motor has never cut out on me so I guess I am okay.

 

[Pas Bon]

Re: Yamaha 155hp 4 stroke questions 2011

I have a 2002 115 4 stroke and if you cut it hard in a turn and it "cavitates" the rev limiter comes in handy...happens more often that you might think!