The port engine on my Grady quit running while heading back in last week.
The problem was diagnosed as a faulty low pressure fuel pump. It's a pretty
inexpensive part, so I told the dealer to replace it and the five other ones
as a precaution.

But that same day, the owner of the dealership called to pitch me on
four-strokes. With my old motors as trade, and reusing my existing gauges
and binnacle, it became pretty cost effective to replace the old
two-strokes. I figured that the fuel (gas and oil) savings alone should
be about $3-4000/year. But more importantly, I'm going from a 5 year old
motor with no warranty, to a brand new motor with a 3-year warranty.

I may not keep the boat the 7 years it would take to recoup (in gas money)
the additional cost of upgrading. But if something major went on the
two-strokes in the next couple of years, I'm way ahead with the new engines.
Also, if I sell the boat in 4 or 5 years to upgrade to a different boat, I
figure it would be much more marketable with 4 or 5 year four-strokes, than
9 or 10 year old two-strokes.

I'll be sure to post performance data on the engines vs. the old ones once I
get past the break-in.

The new engines are twin Yamaha F250 four-strokes.