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New 2017 25hp 4 stroke efi yamaha
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<blockquote data-quote="tomme boy" data-source="post: 437882" data-attributes="member: 11342"><p>Unless you know someone that can hack the ECM and reprogram it. I had my 175EFI flashed and reprogramed with the 200hp program and gained 4mph. Went from 72 to 76mph. Could have gained a little more if I would have put in the 200hp exhaust tuner. </p><p></p><p>The Merc 135 EFI had a restrictor over the throttle body. Same programing as the 150. 175 had different programing. 200 had program and exhaust tuner.</p></blockquote><p></p>
[QUOTE="tomme boy, post: 437882, member: 11342"] Unless you know someone that can hack the ECM and reprogram it. I had my 175EFI flashed and reprogramed with the 200hp program and gained 4mph. Went from 72 to 76mph. Could have gained a little more if I would have put in the 200hp exhaust tuner. The Merc 135 EFI had a restrictor over the throttle body. Same programing as the 150. 175 had different programing. 200 had program and exhaust tuner. [/QUOTE]
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