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New To Me Motor. Get More HP?
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<blockquote data-quote="Ebug" data-source="post: 445873" data-attributes="member: 11893"><p>I normally start my research into questions like this by going to an online parts supplier and start comparing part numbers between the engine I have and the next hp size up.</p><p></p><p>When I did that for my Johnson 40HP I found that all that is needed to make my engine meet the 50HP mark is to change the reeds/reed cage and carburetors. I'm sure there will need to be a jet change in there too.</p><p></p><p>I looked at your engine and it appears there was a 30hp & 35hp that year. Both have identical cranks, pistons, carbs, reeds/jets...so you have what you have. The 40hp engine above yours is a different block completely.</p><p></p><p>Rob</p></blockquote><p></p>
[QUOTE="Ebug, post: 445873, member: 11893"] I normally start my research into questions like this by going to an online parts supplier and start comparing part numbers between the engine I have and the next hp size up. When I did that for my Johnson 40HP I found that all that is needed to make my engine meet the 50HP mark is to change the reeds/reed cage and carburetors. I'm sure there will need to be a jet change in there too. I looked at your engine and it appears there was a 30hp & 35hp that year. Both have identical cranks, pistons, carbs, reeds/jets...so you have what you have. The 40hp engine above yours is a different block completely. Rob [/QUOTE]
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