If I was gonna repower that boat I would find myself a remaining stock Yamaha 2 stroke 115 V4. Virtually no maintenance, pretty good fuel economy, and WAY cheaper than a new 4 stroke or Etec.

I bought one a couple years ago with less than 100 hours on it for $5k. Hung it myself and on my Olympic it burns about 8 gph at cruise. New Yami 115 four stroke roughly 10k, Etec 11k. How much gas and oil can you buy with that $5000 in savings?

Besides, nothing sounds better than a 2 stroke running on the ear muffs in the driveway!!