'85 Cobalt Restoration

NorCal Boater

Well-Known Member
SILVER Sponsor
Jan 24, 2008
3,451
Covington, LA
Boat Info
Boatless
Engines
No boat....no engines
Last November I brought the 1985 Cobalt CM23 that I used to owed, and now own again, from Long Beach, CA up to Northern Cal. I originally bought in November of '89 with a partner. I stayed in the partnership for about 12 years and got out when the partnership began to wear a bit thin. My partner then spent a lot of money on the boat having it painted, reupholstered and a larger engine installed. He always wanted it to go faster so he had a 383 stroker motor built. At that time he had a closed cooling system installed When I bought the boat I knew it needed at least, a starter, and so the boat was not running at that time. Shorty after I got it up here it started raining and rained for a couple of months. About a month ago I was really able to start seeing what I had in front of me. I used this boat last July and it ran well. It was rough in several spots but it had been such a great boat I really wanted it back.

Here is a picture taken last July in Long Beach


This model was only made for 3 years with a total of 89 units made. In 1985 only 15 were made and the serial # on mine is 0015. So I have the last CM23 ever made.

The more I started taking things apart the more things started falling apart. This boat originally came with a 260 Mercruiser. The engine is mounted in the center (therefore the "CM" in the model name) of the boat and has a drive shaft back to, what was originally a pre-Alpha drive. It now has a SEI drive on it that's about 2 years old. As I was looking around I discovered some oil in the cooling system and suspected a blown head gasket.

Also, most of the wood bulkheads and cabinets had water damage to some degree. The cabinet below the helm as well as the wet bar cabinet opposite we made of plywood covered with a Formica-like product that was supposed to look like teak....it didn't. Also the carpet was trash. So I began rebuilding all of the cabinets and panels from marine plywood and decided to cover them with real teak veneer and finish them rather than go back to plastic laminate.

I have been working on the hull at my marina and the cabinetry here in my garage. This weekend I brought the boat to the house to do some work. The first was to pull out all the old carpet and then pressure wash everything.

Here she is behind my new (to me) '06 F250.


Here is a couple of shots before I started pulling carpet and old wires




At some point the boat had quite a bit of water inside along with oil leaking into the bilge. It left some black oily globs that I have been told were where algae formed on the oil. Anyway, it was all over everything and today I was able to get it all cleaned out.

Here is a before shot and a couple of shots after.





There was so much wiring that went nowhere so I started taking out everything that wasn't part of the original wiring. I have the original wiring diagram so I began labeling all that remains. Here is some of the wire I removed



I was also able to do a compression check and found every cylinder at 158 lbs except for one that's 100. Next week I will start to pull the heads and get them into the shop for a valve job.

The miraculous thing about this boat is it sat in salt water for the past 30 years. It spent very little time on a trailer and there is no soft wood on it anywhere. The floors and foredeck are rock solid. Really a testament to Cobalt and their build quality.

I will continue to document the restoration for myself and post the journey. I am really looking forward to getting this beauty back in the water.

Shawn
 
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Good Luck with your restoration. I really like the lines of that boat, it's a real classic.
 
I don't know if it's because I'm old, but I really like the lines on the older boats better than the newer ones. Yours is a beauty.

I'll keep watching as you do your resto project. Thanks for posting these pics.
 
Sweet looking boat, love the hull color, too. The mid engine is very cool, also. Love the 80's boats.......see what I own?
 
I don't know if it's because I'm old, but I really like the lines on the older boats better than the newer ones. Yours is a beauty.

I'll keep watching as you do your resto project. Thanks for posting these pics.

I know I'm old. I'll be 65 next month and when I was growing up 65 was the age people retired and became officially....old. But I first saw this boat in November of 1989. She was sitting in the water in Long Beach at the dock of a friend, and boat partner's dockside restaurant. It was love at first sight. I think the look and the lines are classic and timeless. I guess you are like me and prefer boats that still look like boats.

Unfortunately I am going to have to put this project on hold for a few weeks. Makai is for sale and now that the weather has dried up I have some teak that needs my attention so she looks good for a potential buyer. I will post my progress on the Cobalt as I start it up again.

Thanks to all for the comments and support.
Shawn
 
I´m not that old ;) But that is a good looking boat. Good luck with the renovation :thumbsup:
 
I tend to like the older classic looking boats - really like the lines on the 80's vintage SeaRays and Cobalts. That one is a beauty.
 
That's one nice looking boat great pics. You could almost pay for the resto with that pile of wire.

I still call people younger than me old farts forgetting how old I am now, hate shopping anymore everything we like is called Classic.
 
mid engine boat. is that common? ski boats were the only ones like that in my area.

In the early 80s Cobalt had a series of boats called the "C Series." There was a CS7, CS9, CM9, CS23 and a CM 23. The boats with the "M" in the model number had the center mounted engine. Here is a link to the brochure for 1985. http://www.cobaltboats.com/art/brochures/Cobalt_1985.pdf

It was a package from Mercruiser called the "Skier Package." They tried to get it to catch on in ski boats rather than straight inboards. It was also used in some center console boats.

The really cool thing about this boat is the ride. With the weight that far forward it will maintain plane at about 14 mph. The outdrive does not use the built-in water pump. There is a raw water pump and intake just like an inboard motor but the motor sits level rather than at a backward angle for the prop shaft output. The fuel tank sit across the stern above the floor and you do have about 350 lbs. when full put that is several hundred pounds less that having the motor back there.

I would say the Mercruiser center-mount engine/outdrive is pretty rare. I've only seen it in these Cobalt models.
 
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My thoughts exactly on the center mount engine. Very cool. Just need to make sure the drive shaft joints stay in good shape. Wouldn't want that thing flailing away under the tank if the joints broke. Seems like they would have a shaft safety ring in there. Wouldn't hurt to install one though.

The floor and fiberglass work look in great shape though.
 
Its actually pretty amazing Bill that this boat is in such good shape. I've had this thing since early November and just yesterday had an "Oh $hit" moment when I realized that I never changed ownership or registered the trailer. The tags are 2002. That's probably the last time this boat was on a trailer. When we bought it there was no trailer. It has been sitting in salt water for 30 years. Yes, it's had a couple of drives but the hull is solid as a rock. Really a testament to Cobalt's build quality. Or dumb luck....I'll take either.

The drive shaft and the u-joints appear to be beefier that a car.
 
Shawn, I recognize that spot from the July photo, right behind marina pacifica... just a few hundred yards from where our boat is! Looking forward to following your restoration, its going to look great!
 
JC,

If you're in Alamitos Bay then you are familiar with some of this history. The guy I bought it from lives in Marina Pacifica as does my old partner. My partner owns Schooner or Later and Tantalum. He recently added Schoonin' on Sunset in Sunset Beach. The name on the Cobalt is Schoonin'.
 
I had some time on my hands Tuesday before I took her back to the marina so I decided to see how well the hull would buff out. I wish I had taken some before pics but at least I got some afters.

This boat was painted about 15 years ago and I think, had some sections repainted. The gold leaf stripe is going to need some repair at some time in the future. There were places on both sides where uncovered fenders had destroyed any shine. I tried several different things but got the best results with Presta on the buffer and the switched to the Shurehold random/orbital with Buff Magic and ProPolish. Only one coat of ProPolish for now but I wanted to get some protection on it.

Not bad for a 30-year-old boat.



 
Hey Shawn
I will be following this restoration with great interest!
I'm trying to figure out how the helm seat works alongside the engine box. Is it an illusion that they are that close together??
 

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