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20 hp 1989 evinrude tracker motor
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<blockquote data-quote="Bowhunter1661" data-source="post: 391770" data-attributes="member: 9937"><p>I am currently working on my 88 Johnson 25 in order to convert it to the 35. I run 30 MPH at WOT. Hoping to get to mid 30's with the upgrade. Also I am doing the same thing you are. That is enlarging my 25 hp manifold intake hole along with a 35 HP carb. </p><p></p><p>A lot of people use Dremel tools or hole saws to cut their manifold intake hole larger. I am going to try and use a rough hone for honing cylinders then finish it off with a fine hone. May take a little longer but it will give me a perfect hole, or at least I hope!</p></blockquote><p></p>
[QUOTE="Bowhunter1661, post: 391770, member: 9937"] I am currently working on my 88 Johnson 25 in order to convert it to the 35. I run 30 MPH at WOT. Hoping to get to mid 30's with the upgrade. Also I am doing the same thing you are. That is enlarging my 25 hp manifold intake hole along with a 35 HP carb. A lot of people use Dremel tools or hole saws to cut their manifold intake hole larger. I am going to try and use a rough hone for honing cylinders then finish it off with a fine hone. May take a little longer but it will give me a perfect hole, or at least I hope! [/QUOTE]
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