Oil mix Ratios, and cooling

I recall reading an article in an issue of SMALL BOAT JOURNAL back in the 1980's that reviewed the ESKA 5hp outboard, the powerhead was air-cooled, but there was a waterpump to cool the exhaust flowing out down the drive leg. The outboard ran on 50/1 fuel/oil mix, however if the waterpump failed you needed to run using 25/1 fuel / oil ratio to keep the engine cool. I would think that on any 2-stroke engine, up to a point it would be better to use too much oil than too little. More oil should equal less friction and thus cooler running.....as I say, up to a point! Rod Johnson 30 Seconds can save a lifetime. Get it done. Its never been easier. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTQcxHy3thp6vkmx6Oh1eRJUh645Vz6sQUNlPSG5lsVzcHHa0Q4r7q/

Rodney G Johnson wrote: > > I recall reading an article in an issue of SMALL BOAT JOURNAL back in > the 1980's that reviewed the ESKA 5hp outboard, the powerhead was > air-cooled, but there was a waterpump to cool the exhaust flowing out > down the drive leg. The outboard ran on 50/1 fuel/oil mix, however if > the waterpump failed you needed to run using 25/1 fuel / oil ratio to > keep the engine cool. I would think that on any 2-stroke engine, up to > a point it would be better to use too much oil than too little. More > oil should equal less friction and thus cooler running.....as I say, > up to a point! I recall reading long ago that the manufacturer's recommendation for oil mix had a very healthy range of tolerance, on the theory that a lot of users were not going to be very scientific about measurement of the mixture. My practice has always been to be as careful as possible, to get as close to the recommended oil ratio as possible. And as a sidelight, my 2005 Ford Ranger has a 4 cyl. engine with an interesting design feature. When the computer senses overheating, it switches off two cylinders so they just pump air through, helping to cool it. Chris Campbell > >