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Author Topic:   Engine-oil slurper or guzzler?
bwo posted 07-21-2003 07:32 AM ET (US)   Profile for bwo   Send Email to bwo  
Roughly how much oil should my outboard consume per tank of gas (77 gallons)? This is my first season using a 2001 Yamaha 225 Saltwater Series II (on a 22' Outrage). The engine runs great, but not knowing how much oil she should be slurping I am wondering if she is actually guzzling oil? She has consumed a couple of gallons (4?) of oil in 37 hours of operation so far this season.
Peter posted 07-21-2003 09:06 AM ET (US)     Profile for Peter  Send Email to Peter     
The amount of oil your motor consumes will depend on how you operate your motor. At full throttle, I believe the consumption ratio is greater than 50:1 but at idle it might be something like 100:1.

Most of the operation of my Yamaha 225 is below 4000 rpm. I find that I have to add a gallon of oil about every 75 gallons of gas consumed (usually about every other fill up). During my typical 50 - 75 operating hour season, I usually consume about 6 to 8 gallons of oil.

Just recently I made several extended runs operating the motor above 4000 rpm. I noticed increased oil consumption to the point where I had to add a gallon of oil after about 50 to 60 gallons of gas consumed.

Although it depends on your operation, I believe that adding a gallon of oil for every tank (77 gallons of gas in a 22 Outrage or Revenge) would not be unusual.

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