Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, help

I recently bought my family a 1995 Donzi Medallion 210 boat, after running it 3 times without any issues I out the boat in and it fails to turn over. Long story short my starter went, when I went to replace the starter I found a few chipped teeth on my fly wheel. After finding this, I figured I would just have a boat mechanic do the work as I really am not good with this kind of stuff. At this point in time, boat engine was not seized up just was a grinding / winding sound in motor which I believe was the faulty starter and chipped teeth. Anyway he replaces starter as well as fly wheel and then calls me and tells me that the motor is seized, which it previously had not been. I had run the boat 3 day's prior without any problems at all. He did what he could and said he found water in where the spark plugs were, which leads him to believe that I have cracked heads. If this is the case, I will either need to buy a new motor (refurbished or new) or have mine rebuilt. He said there really wasnt any sense of taking motor all apart only to find what he thinks is cracked heads cause it would cost me more money.

I am looking for suggestions. I am hearing it from the wife, cause I just wasted $12,000 and I am now being told I have to put another $5000 into it.

I guess Im looking for suggestions, maybe where to look to by new motor or refurbish or what not. Im really depressed by this and dont know where to start.

I am pretty certain the motor is a mercruiser 5.7L, not 100% but think it may be an alpha one.

I thank you for any input you may have.

Mike

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

Also if you think I would get more views in a different location of this site, please lmk

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

second opinions are cheaper than new motors

first find a new mechanic because cracked heads aren't always the reason for water in the cylinders and if he just looked at the engine and made that determination without tearing it apart, he's in the wrong business (x-ray vision pays big time)

could be you have an exhaust manifold gasket issues or the water shutters have failed

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

hydro-lock is the quickest way to ruin a starter and flywheel. Has it been hard starting? The water could have come from a leaking manifold or riser to enter the cylinders. How old are the manifolds and risers?

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

If working on the engine is not an option for you, find another mechanic.

Where are you located? Maybe somebody on here can help you find a good local mechanic.

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

Find a new shop! Make this guy famous by talikng about him.

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

vipzach said:

If working on the engine is not an option for you, find another mechanic.

Where are you located? Maybe somebody on here can help you find a good local mechanic.

Click to expand...

Im located at zip code 13662 upstate NY... I dont know many local boat mechanics.

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

MikeyB13662 said:

Im located at zip code 13662 upstate NY... I dont know many local boat mechanics.

Click to expand...

Ayuh,... There's only about a Bazillion marinas, 'n mechanics along the mighty St Lawrence...

I just don't know any personally that far down the creek...

Re: Just bought a 1995 Donzi Medallion 210 and after 3 times out motor seized up, hel

Well, I took your suggestions and took it to another mechanic and after taking the motor apart it was seized and had water damage. The heads or block were NOT cracked, but was left in bad shape, as the previous mechanic didnt put the plugs back in it and it sat and rusted up.

Anyway, I chose to buy a new block and have it installed. My new mechanic said the only way water could have gotten into the motor like that was from leaking manifold or gasket.... When we looked at the old block one of the holes on the block going to the port side manifold had a little orange rust which leads him to this conclusion.

I want to replace my entire manifolds to eliminate any problems. I am clueless as to exactly what one I need... Do any of you have any suggestions? I know I am in the ballpark, but I dont know what size risers I need, etc... The boat is stock...

I would appreciate any info you may have....

Mike