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Breaking in an outboard
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<blockquote data-quote="FuzzyGrub" data-source="post: 208704" data-attributes="member: 3438"><p>FWIW:</p><p>I looked at the Yamaha 2-stroke break-in procedure. That 1st 10 minutes, which recommends "fast" idle and not in gear. I am not an outboard engineer, but that sounds like just getting the motor up to operating temp. The yamaha procedure matches my nissan's break-in procedures. </p><p></p><p>I also looked at my new to me Merc 25 2 stroke manual, and the break-in is significantly different. It says 1 hour break-in, and to avoid remaining at contstant speed for more than 2 minutes and sustained wide open runs. That's it.</p><p></p><p>All recommend 25:1 during break-in.</p><p></p><p>I have never seen one that calls for 1 hour of idling.</p></blockquote><p></p>
[QUOTE="FuzzyGrub, post: 208704, member: 3438"] FWIW: I looked at the Yamaha 2-stroke break-in procedure. That 1st 10 minutes, which recommends "fast" idle and not in gear. I am not an outboard engineer, but that sounds like just getting the motor up to operating temp. The yamaha procedure matches my nissan's break-in procedures. I also looked at my new to me Merc 25 2 stroke manual, and the break-in is significantly different. It says 1 hour break-in, and to avoid remaining at contstant speed for more than 2 minutes and sustained wide open runs. That's it. All recommend 25:1 during break-in. I have never seen one that calls for 1 hour of idling. [/QUOTE]
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