wrote I have a 2003 E-tec 225HP with 200 hours.
It has always used the
Evinrude factory oil.
Do you recommend the engine tuner be used to remove carbon?
Is there any downside to using this tuner?



If you indeed have a 2003 225hp Evinrude, you have the DI version (FICHT),
not the E-TEC. A model number posted here would tell exactly what you have.

It is a good idea to decarbon the motor once a year or every 100 hours at
the same time as the annual service (100 hr.) is due. Also that motor has an
exhaust pressure sensor tube that should be removed and cleaned at the same
interval. Even though it is listed in the owners manual and the service
manual, many folks are not familiar with it.

Bill Grannis
service manager