How hard is it to change out a thermostat on a MERC 2.5 O/B. Is this something I can do myself or is this a send to shop deal??

Are you sure they have one.I've never seen or heard of one.Why do you need to change one?

high perf 2.5 motors dont have thermostats. if its a production motor then it does , one on top of each cylinder head , easy to change , take about ten minutes each? having temp problems?

Mercman,
Yes on the temp problem. one motor runs hotter than the other. Not comfortable with it running that warm so I'm considering changeing the T-stat and the impeller that should cover my bases.

WHAT KIND OF MOTOR? PRODUCTION OR HIGH PERF , WHAT H.P.?

The motors are 1996 2.5/ 200 hp carb not Efi. stock motors with bobs machine nosecones. I ordered new t-stats and looked at the old ones cleaned them up a bit the motor still runs a little to warm for my likeing so I'm going to change them out and also the Impeller. But that is not a big problem. My big problem is I hit somthing this weekend and bent my prop shaft so thats going in to the shop on wed. to get a new shaft put in place. Thats going to hurt the wallet!!! Mercman thanks for the reply, I'll keep you informed as to how things go.

mercman has plenty of nice propshafts to save you some money!!!! dont pay that new price , it will break your wallet , you might want to also have the poppett valve checked as well.

Mercman, how much for one of your prop shafts ? Are they new? Used ? Give me some facts?? Do you have one for my motor? 1996 2.5 carb motor. serial # ogo61445 let me know I might be interested. Anything to save a few Bucks!!!

yes i have used ones , stock gearcase has a stainless 2 piece shaft , i usually sell them half of retail.