2007 115 value and comparison to df140

[barrell]

Im thinking of upgrading to a the 140. I understand all boats,motors,and props are different but I currently get 28knots with the 115 ona 21 Maritime skiff turning a stainelss 14x20 prop. What can I excpect after the upgrade? I was hoping for an aditional 8-10 mph. How about the used value for a 2007 df115 in very good condition? I cant find any used ones for sale on the interenet.
609-513-1680

[mitch]

How many hours ? 140 and 115 are the same cc size just the 140 is hotted up a bit also different gear ratio

what is the price difference in a 150 as they are a bigger cc motor if you want to trade, mid winter is a good time to get the best deal on a new donk.

[barrell]

Sorry, 350 hours now, probably 400 when I want to sell around labor day. I heard the 140 has larger pistons and that was why the 115 wheighs 8 pounds more. My 21 maritime only has a 30 gallon tank and I was told the fuel milage of the 150 was considerably less then the 140. I commonly run 30 miles offshore. Is it possible to "hot up" a 115 since its the same engine?

[AKjohn]

140 is not same as the 115 and 8-10 mph gain is wishfull thinking.......IMO

[mitch]

115 bore 84. mm 1950 cc
stroke 88 mm
gear ratio 2.59

140 bore 86 mm 2044 cc bored out 2 mm
stroke 88mm
gear ratio 2.38

same block just hotted

no you would be better off looking at 150