Re: [Cal_Boats] Outboards, oil ratio, Evinrudes...(CH)

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 On Sun, 22 Feb 2009 17:46:35 -0800 (PST) Gerald Sobel <so… [at] yahoo.com> writes: --- On Sun, 2/22/09, JB <ca… [at] southslope.net> wrote: From: JB <ca… [at] southslope.net> Subject: Re: [Cal_Boats]Sea skiffs, Indy structural Evinrudes...(CH) To: Ca… [at] yahoogroups.com Date: Sunday, February 22, 2009, 5:21 PM JB wrote: Greetings Sailors, Something I read a long time ago that is not intuitively obvious. The more oil you put in the mixture the leaner the engine runs. So more oil means hotter engine. Not the desired result. Probably best to follow the manufacturers recommendations as closely as possible. JB, Not necessarily does leaner means hotter, sometimes means cooler. I recall from my time in navy there is a certain optimal ratio where there is neither excess air nor excess fuel, where the engine runs really hot. Excess air may mean it runs cooler. So, regards using a 50:1 vs. 100:1 that Suzuki recommends, I'm not sure. Probably best to consult Suzuki. Meanwhile my mechanic didn't think it was a lack of oil that made my Evinrude 6 blow it's bearings, but then I'm not sure then why it happened. Poor engineering? Find Business Careers here. The source for New Careers. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTEKqdXvrfimoksOC6Gi8HLV5M5VNqAk99m7wZVSowgpA9j4QDhgRy/

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 On Sun, 22 Feb 2009 17:46:35 -0800 (PST) Gerald Sobel <so… [at] yahoo.com> writes: --- On Sun, 2/22/09, JB <ca… [at] southslope.net> wrote: From: JB <ca… [at] southslope.net> Subject: Re: [Cal_Boats]Sea skiffs, Indy structural Evinrudes...(CH) To: Ca… [at] yahoogroups.com Date: Sunday, February 22, 2009, 5:21 PM JB wrote: Greetings Sailors, Something I read a long time ago that is not intuitively obvious. The more oil you put in the mixture the leaner the engine runs. So more oil means hotter engine. Not the desired result. Probably best to follow the manufacturers recommendations as closely as possible. JB, Not necessarily does leaner means hotter, sometimes means cooler. I recall from my time in navy there is a certain optimal ratio where there is neither excess air nor excess fuel, where the engine runs really hot. Excess air may mean it runs cooler. So, regards using a 50:1 vs. 100:1 that Suzuki recommends, I'm not sure. Probably best to consult Suzuki. Meanwhile my mechanic didn't think it was a lack of oil that made my Evinrude 6 blow it's bearings, but then I'm not sure then why it happened. Poor engineering? $1.99 each for 4 movies & free shipping when you join! http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTNC6eVKV4jFptmEP0cKPFgiiOtus7FgZdGjwxkZwNykP9tvKgV5Fn/