I'm running a 16x21 3 blade suzuki/powertech prop that will allow me to bang the rev limiter of 6300 with no load. The DF series has a lower gear ratio that allows for a big wheel, offers tons of holding power and tons and stearn lift. I have a 16x23 on the shelf that is a wee too much for what I do but may be an option for you.
As far as re-tuning.... Well, I just confirmed that the df 200 - 250 series all share the exact same displacement so there is no physical difference enginewise. That leaves it to just two items: Fuel/air delivery and or ECM. I'd be willing to bet all differences exist in the ECM to which that would be all I think you need to find. Attached are the spec sheets for all showing only RPM redline changes.
If it was me, I would'nt change a thing unless it didn't meet my expectations. I'm willing to bet the the 200 outboard will show it's stearn to a small block I/O on the same platform.
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[b]The Moose is Loose !
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