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25 to 35 hp Johnson Powerhead
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<blockquote data-quote="Pappy" data-source="post: 364573" data-attributes="member: 3278"><p>...............so much for the parts book helping me out...lol</p><p></p><p>Okay....now where were we.</p><p>You have the 500CC version which was the (outboard) 25hp. </p><p>If you can find the 565CC 35hp powerhead you will definitely gain some. </p><p>I have several of these 3-cylinder engines and several sets of carbs. </p><p></p><p>Incidentally, the reason why the carbs did not help out is that the venture size on the two sets of carbs is identical and the 35hp carbs have larger jets so there would be no gain by going to them. The larger cu.in. 35hp took advantage of those venturis a little better than the smaller one did.</p></blockquote><p></p>
[QUOTE="Pappy, post: 364573, member: 3278"] ...............so much for the parts book helping me out...lol Okay....now where were we. You have the 500CC version which was the (outboard) 25hp. If you can find the 565CC 35hp powerhead you will definitely gain some. I have several of these 3-cylinder engines and several sets of carbs. Incidentally, the reason why the carbs did not help out is that the venture size on the two sets of carbs is identical and the 35hp carbs have larger jets so there would be no gain by going to them. The larger cu.in. 35hp took advantage of those venturis a little better than the smaller one did. [/QUOTE]
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25 to 35 hp Johnson Powerhead
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