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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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<blockquote data-quote="Edstrossner" data-source="post: 373790" data-attributes="member: 15774"><p>Thanks for the info!</p><p></p><p>I did check the plugs when I came in. Since I started using the 70hp carb I have been increasing the main jet size. It was at 67 but it appears to be lean still so I just when up to 70. </p><p>I also cut a hole in the hood in the area behind the grab handle, then I shimmed up the grab handle a bit to act as a scoop. It's not a huge opening but as the boat speed picks up, more air will be forced under the hood. I did this to a 70hp a couple of years ago. It works great.</p></blockquote><p></p>
[QUOTE="Edstrossner, post: 373790, member: 15774"] Thanks for the info! I did check the plugs when I came in. Since I started using the 70hp carb I have been increasing the main jet size. It was at 67 but it appears to be lean still so I just when up to 70. I also cut a hole in the hood in the area behind the grab handle, then I shimmed up the grab handle a bit to act as a scoop. It's not a huge opening but as the boat speed picks up, more air will be forced under the hood. I did this to a 70hp a couple of years ago. It works great. [/QUOTE]
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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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