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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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<blockquote data-quote="durco" data-source="post: 462291" data-attributes="member: 24419"><p>I have a 1984 35 and a 1988 30. You can really feel the difference between the two; the 35 being stronger. When I change motors on the same hull I have to move the tilt pin because the 35 will porpoise whereas the 30 will not. Same pitch prop (13). Did some research in the parts manual. 1984 35 has a different crankcase than a 1985 30. So, when I went to OMC service school in 2000, I asked my instructor what the difference was. He said, "finger ports" vs. "bridge ports". Bridge ports make the true "hot-rod" 35.</p></blockquote><p></p>
[QUOTE="durco, post: 462291, member: 24419"] I have a 1984 35 and a 1988 30. You can really feel the difference between the two; the 35 being stronger. When I change motors on the same hull I have to move the tilt pin because the 35 will porpoise whereas the 30 will not. Same pitch prop (13). Did some research in the parts manual. 1984 35 has a different crankcase than a 1985 30. So, when I went to OMC service school in 2000, I asked my instructor what the difference was. He said, "finger ports" vs. "bridge ports". Bridge ports make the true "hot-rod" 35. [/QUOTE]
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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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