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yamaha 15hp 2 stroke 100:1 or different
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<blockquote data-quote="Deadmeat" data-source="post: 143723" data-attributes="member: 704"><p>I've asked the same question before and just like the last time I asked it, there seems to be no consensus. I ran my 1988 30-hp Evinrude for 17 years at 100:1 and it never saw the inside of a repair shop once. But then again I was almost always on the lake at least once a week during that time. I was also religious about running a gas additive called PRI-G. Whether it had anything to do with the reliability of the motor, I don't know. My own inclination is to run it at 50:1 but the owner's manual as well as the boat dealer I bought my new Yamaha 25-hp 2-stroke from say to run it at 100:1. If the PRI-G does says what it says it does and prevents carbon deposits from building up, I can't see that 50:1 would hurt and it would give me a peace of mind that 100:1 wouldn't. While the difference between 100:1 and 50:1 is double, in the gas mixture itself it's an increase of only 1%. Would this really cause any trouble in terms of carbon deposits, etc.?</p></blockquote><p></p>
[QUOTE="Deadmeat, post: 143723, member: 704"] I've asked the same question before and just like the last time I asked it, there seems to be no consensus. I ran my 1988 30-hp Evinrude for 17 years at 100:1 and it never saw the inside of a repair shop once. But then again I was almost always on the lake at least once a week during that time. I was also religious about running a gas additive called PRI-G. Whether it had anything to do with the reliability of the motor, I don't know. My own inclination is to run it at 50:1 but the owner's manual as well as the boat dealer I bought my new Yamaha 25-hp 2-stroke from say to run it at 100:1. If the PRI-G does says what it says it does and prevents carbon deposits from building up, I can't see that 50:1 would hurt and it would give me a peace of mind that 100:1 wouldn't. While the difference between 100:1 and 50:1 is double, in the gas mixture itself it's an increase of only 1%. Would this really cause any trouble in terms of carbon deposits, etc.? [/QUOTE]
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