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  1. S

    40 Merc upgrade to 50?

    Did a bunch of searches first, but no luck. Anyone know what needs to be done to increase a (late 90s 4 cylinder 40) to 50HP? Thinking carbs & maybe some other stuff. Thanks!
  2. S

    Merc 115 Carb vs. Merc 115 4 Stroke

    Asked a lot of questions on here about carb, 4 str<br />& Optimax last summer. Bought a 04 115 4 Stroke last Sep to replace my 00 115 Carb. Here's is what I noticed:<br /><br />Engine on a Key West 1720 DC, used same prop on new motor--19" Stainless 3 blade w/ no vent holes<br /><br />115...
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