Depends on the boat your using this on. The 125 is not a very good engine
in my opinion. It has that jump from about 1500 rpms to 3000 rpms. It was
designed for a bass boat or small runabout application where you would not
be trying to run at very low speeds. Again, what boat and what is it rated
for. You just found out why I always recommend the max hp for a boat.
As for value of that engine. You are not going to be happy w/ the trade
value. Probably about $3500 at best.
Go w/ either Merc or Yamaha EFI. Depends on the dealer in your area as both
are very good engines.

Tony
my boats at http://t.thomas.home.mchsi.com


"JGK" wrote in message
.. .
I have a 1999 Merc 125, Have not really been happy about its performance
or
reliability.
I would like to upgrade it to a 150HP but not sure if I should stick to
Mercury. A few questions on this:
1. If you were upgrading to a 150 HP engine, which one would you look at?
2. What can I expect to get for the 1999 Merc 125
Thanks