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I believe that I was on the wrong track for a bit? I could not figure out how the water was getting into the engine and exhaust, specifically on the starboard side. I speculated that the risers weren't high enough at first. However, after looking at hundreds of pictures of similar Sea Ray models...

Just about ready to set her back in. Waiting on the new exhaust gaskets, much easier to install on the stand.

Rethinking the riser height again. Every Sea Ray Sundancer I look at doesn't require the riser extension. I was wondering why mine would.

Don't know how I missed this, but found this broken water jacket in the head on the starboard side! Painted it blue to make it easier to see. Mystery solved. I wonder how in the world this happened? This was a fairly fresh motor.

This is just like a puzzle! I think the pieces are coming together slowly. So, I bought this boat and have now discovered that the engine has been replaced. It is a rebuilt 5.7 with a .060 bore. It also has Barr exhaust and risers......not OEM Mercruiser. So, it ingested water, filled the oil...

What a crying shame! LOL This is obviously a rebuilt rotating assy that blew the head gaskets on each side between the center cylinders. I believe this is the result of a stuck thermostat, but not certain. I'm not taking a chance on the exhaust or risers either. Buying new OEM Mercruiser exhaust...

It's a vortec, with the one piece rear seal. I'm considering just "long blocking" the motor with my cam specs. I have a major local builder that will do it for $1200.....includes gasket set and oil pump. The intake manifold is in super condition.

Pulled her apart and inspected. Blown head gaskets, both sides. One side worse than the other. Found that this engine has been rebuilt with Enginetech rebuild kit. .060 pistons, so they have pushed the limit with the bore in my opinion. I have always had overheating issues with .060 bore small...

How do I check? When I look into the risers, I see the rubber flappers still in place. How can I check the manifolds?

Pulled the motor......ring gear on the flywheel is toast. Rebuilding the motor right now. Just ordered a 168 tooth ring gear as well. Nice clean engine compartment and factory wiring. Can't wait to set her back in and watch it perform on the water. This boat has never run right since I bought it.

Well, moving right along. Pulled the 5.7 yesterday, easy peasy. Pulled the exhaust and flywheel cover and found that the ring gear on the flywheel has some worn and flat spots, so this explains the starter issue. Also removed the spark plugs and found water. Major water in the oil also. So...

Any suggestion on where to purchase the exact manual I need? Several seem to be available from Clymer to Mercruiser but they just cover a specific range, like 84 - 92. I have a 1990 250DA which Sea Ray doesn't readily offer manuals for that model for some reason. A review on the Clymer book says...

Yes, but thanks for checking on me! LOL Bigger problem now, found water in the oil........motor coming out now. I'm going completely through it now. I wish the previous owner had of been up front with me. At least I will have the peace of mind when I get finished. I'm a mechanic by trade...

Good info, just what I needed to know. I'll start digging into it within the next week or so. Good news is that I have it inside my shop and have an electric crane. This will make my life easier! I'm sure that proper alignment is crucial, so I will gather the info here as I go back together...

Recently bought this 1990 250DA with the 5.7. The boat never has run right since I bought it. I changed the oil and serviced the lower unit when I first got it and have only run it about an hour. Died on the lake, had to get towed in. Loaded it on my trailer and started taking a look at it in my...

I bought this boat and soon found that it has a starter issue. It's a 1990 250DA with a single 5.7 Mercruiser. Someone has apparently replaced the original starter with an Arco aftermarket. The problem is that sometimes it jumps and skips while attempting to turn the engine over. I pulled the...

Looking to replace the starter on my 90 model sundancer with the single 5.7. Someone has installed a cheap reman starter and it has issues. What is the best replacement starter for this mercruiser new, at a reasonable price? Is this a clockwise starter?

Got it! Thanks!!

Great idea. Thanks for the advise. All I have to do is locate it now. :) I'll use a set of needle nose vise grips and lightly apply the clamp!

I'll know more when I return to Texas and have a chance to take a glance at it a little closer. I only moved the timing ever so slightly while running, I would say no more than 4 to 6 degrees max. So yes, I will check the easy things first. My biggest concern is, can I safely remove the water...