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  1. S

    Merc 90 2 stroke specific carb questions

    Yes, it has an idle cicuit just like the other 2 carbs. Keep in mind that this is a 2008, there may have been a factory mod to kill cyl1 similar to what the 4 cyls have.
  2. S

    2 stroke 3 cyl HP ratings

    You're correct that less throttle on large carbs is less power, but smaller carbs don't always mean less power. My point isn't to go down in power... but with a pretty significant amount of unusable throttle, smaller carbs will deliver better fuel economy and be more responsive. Trust me, being...
  3. S

    2 stroke 3 cyl HP ratings

    Thank you. I have a 2008 90 elpto. I have it running great, 36 mph on a 17" prop which is slightly over rev (Yes I have a tach, but I think it's about 400 rpm low when the math is applied) however there is what I consider significant throttle left at peak rpm. I'm wondering if a set of carbs...
  4. S

    Merc 90 2 stroke specific carb questions

    Flyingscott - not to my knowledge, though they had obviously been removed at one point. Please clarify the purpose of the drilled hole under the cover of carb 1 that I referenced. Thanks. Steve
  5. S

    2 stroke 3 cyl HP ratings

    I see the 60, 75 and 90 all share the same bore / stroke, so I'm curious about what is limiting the hp in the 60 and 75 hp engines? Is it strictly carb size, or also port timing? Is the 75 just a 90 with smaller carbs and less ignition advance? TIA, Steve
  6. S

    Merc 90 2 stroke specific carb questions

    Hi all, new to boats and this forum. Not new to engines and tuning. No 2 stroke experience. Quick learner though. Very good with carburetion. This is my first boat, I'm the second owner, and I'm undoing all the jacked up work from the previous owner, and learning all the way. Specifics: 17"...
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