2000 Mercury 225 HP Optimax

[Markus33]

Hello all,

I am experiencing an issue at startup with one of my engines.

Problem: The engine starts with no problem, but goes to excessive high RPM's, then settles down. I am very concerned due to the fact that the oil mixture hasn't had enough time to lubricate the cylinder and reach operating temperature.
I have replaced both the high and low pressure pumps and thoroughly cleaned the VSTs.

Is there an automatic choke adjustment or may there be underlying issues.


Thank you for your consideration!
Mark

 

[racerone]

I do not believe oil is mixed with the gas on the OPTI-MAX models.-----And I do not believe there is an automatic choke on them either.

 

[Markus33]

Thank you for your reply!
Do you have any information in regards to the initial high rev cause?

 

[racerone]

I believe a dealer would plug into the ECU ( computer ) on the motor.----A read out would indicate any issues.