Motor replacement

joelife

Member
Aug 15, 2017
48
Boat Info
240 Sea Ray Sundancer 2008
Engines
5.0 mag w/Bravo 111 drives
Hi All need some advice and info. I have a 2008 240da 5.0 mpi efi bravo 3. 750 hours
I have water in 3 cylinders, not sure where water came from probably manifolds, not sure about compression yet will check end of the week.
So 15 year old boat do I rebuild (My Son and I can Do it) spend about 6 to 7 thousand new manifolds and risers or do I look for a good used 5.7 with low hours. I have seen a few very reasonable prices.
Question1. How do I know it will fit up with my Smartcraft ?
2. what year did Searay start with the smartcraft?
Thanks for your input
 
Drain the block. Remove the spark plugs and Get the water out. Fog the cylinders.

At least then it can sit without damaging the cylinder walls while you make a decision.

If you have the tools and skills, rebuild the top end. New heads, exhaust, injectors tested and cleaned, possibly replace the intake manifold.
That’ll be much less than you think because you are providing the labor.
 
If this boat is run in saltwater and water has been in it more that 24 hours the motor won’t be worth fixing. Don’t fool around with reliability, get a new/rebuilt engine.
 
There has to be more to your story.

How did the motor die? Over heat? Boat flooded? Just didn't start one day?

Once we know more on how it died it could be as simple as a head gasket or the motor imploded on itself if motoring along at high RPM.

I vote for a new or remanufactured motor if signs point to a cracked block or warped heads. The money spent rebuilding your motor if the block is cracked and the heads warped will be more boat bucks then buying a remanufactured.

If you are a DIY'er you can at least remove from boat and do a tear down to see what kind of damage you're dealing with. If you are going to pay someone the labor alone for a tear down and diagnostic you could put towards a new heart.

When my 5.0 died while zooming along at 4000+RPM the cost of new heads and rebuilding was more than a crate motor (with warranty) which was changed out in a few days vs. weeks to rebuild a lump that would have probably had hidden issues.

I think my remanufacture motor + all the labor was 9K.

If you can remove and install yourself I think you could save 2K
 
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