1995 Mercury 225 3.0L Rebuild or Replace Powerhead?

jrodkyle

Cadet
Joined
Jun 9, 2013
Messages
7
I have a 1995 model Mercury 225 that started knocking on our last adventure at the lake. The motor is on a 24' Hurricane deck boat. We love the boat and have never had any issues wioth the motor either. Other than the occasional hard start and smoke when cold. I am now stumped. I do not know what to do moving forward. I feel like I could rebuild the powerhead myself over the winter, but have a friend that warns me of bad machine work costing me more than needed. He was a boat mechanic 20 years ago and seems to think that the machine work is very difficult to be done within Mercury specs. The only thing I have done to the motor so far is pull the heads off and the carbs off. 1 Piston has metal melted into it. The cylinder wall is smooth instead of textured on that cylinder. The reed cage is completley intact and I can not tell exactly where the metal came from. My best guess is a bearing in the motor. Just have not had time to tear into it any further. So I have been looking for a rebuilt powerhead and not happy with the prices I am seeing. the boat is a 1995 modek as well so part of me wants to just let the boat go and let someone with better mechanical knowledge have a nice deck boat. This is our first boat and we have had it for 3 years now. It has become part of our summer life and I cannot imagine having a different boat. Our boat has room for 14 and we always have a big crowd. I really do not know what to do. Just looking for advice from someone more experienced. Most of our friend have ski or wakeboard boats so I always have a part of me wanting to just start over wqith something different, but very attached to the deck boat. My wife and I like the thought of a cuddy cabin, but not sure if it would be ideal for the occasional wakeboarding that the kids enjoy. Thank you in advance for any advice.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,383
I believe iBoats has a list of powerhead rebuilders. They will ship you a rebuilt block, and you install it, add carbs and ign system and away you go. You send the old powerhead back to them. Don't worry, you will still have enough work to install the new block, clean the carbs, rebuild waterpump, fuel pump and other stuff.

Sometimes they have sales.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,932
Well you need to find out what caused the failure. Did the CDM go on that cylinder bad? is a different module causing that one to act up??Did the carb lean out? Did one of the double roller bearings on crank fail andcome thru cylinder? 1995 wasn't that good a year for the 3L motors. You can get a later model 225 for about the price of a powerhead....
https://nashville.craigslist.org/bpd/d/end-of-season-repower-sale/6255145019.html
 
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