I've owned my etec G1 150ho for exactly 2 years now. I recently received an engine history report from my dealer. My etec is NMEA2000 connected to my Garmin and i have done the performance recordings at every RPM range (chart on right). Using the recent report, my performance recordings and knowing that i've put 5 gallons of oil through the motor in 73 hours, i was able to calculate my motor has burned approximately 46 gallons of fuel for every 1 gallon of oil using the TCW3 setting (required on HO model). This would include the break-in period. I know i read alot about guys thinking these motors guzzle oil, but in my case the math works out pretty close to accurate.
Has been a positive experience so far.
Since those figures include the new engine break-in time with extra oil usage, your calculations may be skewed slightly.
For an accurate determination, fill the gas tank and fill the oil tank and run the boat keeping track of every gallon of fuel added until the low oil alarm sounds. Don't worry, you have a lot of running time left when that happens or just carry a gallon with you.
When you get back to the dock, again fill up the fuel tank and total the gallons used and measure the amount of oil needed to fill the oil tank to the same level as starting out. Then do the calculations for a rough average ratio. Keep in mind that the motor uses extra oil during hard acceleration, when starting up the motor, and if the NO OIL alarm comes on as the pump is triggered constantly.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.
So you think I'm actualy getting better than 46:1?
As evidenced by the report, i have 370 starts in 73 hours (about 5/hour) and i love the acceleration so i tend to jump on plane quickly. I also run wide open for at least 30 seconds per trip. Knowing how I drive the boat, i thought 46:1 was pretty good!