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Professor_Porkchops

  • Karma: +0/-0
Over-the-transom risers
« on: June 02, 2021, 06:18:22 pm »
Hello all, I'm looking for some help here.

I have a 1973 Cutlass that my dad purchased new when I was young. It is in great shape for its age, but there are a few things I need to resolve.

The boat has log manifolds and over-the-transom risers that are completely water jacketed, which makes it nice for families. The biggest issue I have is that, after nearly 50 years, the exhaust tube has corroded, so water leaks from the jacket back into the exhaust and into whichever exhaust valve that is open (usually the #5 cylinder) - hydrolock - the very issue over-the-transom headers are meant to avoid.

I would like to replace the risers with something comparable, but I cannot find them anywhere. I will be sending Hardin Marine an email asking if the can custom-manufacture them as well. I would like to keep it as close to the current configuration as possible.

If anybody has a lead on who can supply these headers/risers, I appreciate it!

Additionally, where is the best place to have the interior re-upholstered? I am in Bakersfield, but I can travel if necessary.

Thanks

Klint
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76Mantra455

  • Karma: +7/-0
Re: Over-the-transom risers
« Reply #1 on: June 02, 2021, 10:24:56 pm »
Welcome to the site...im from bakersfield as well... Interior shop...my friend used bakersfield upholstery and it turned out nice...his is thw 75 sanger superjet winter build that is on this site....for the exhaust my other friend is going to make his at his friends muffler shop just bend the pipe and weld it to the exhaust manifold or weld the flange and bolt it.. and tap the fittings for the water

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Professor_Porkchops

  • Karma: +0/-0
Re: Over-the-transom risers
« Reply #2 on: June 03, 2021, 11:26:15 pm »
Thanks for the advice on Bakersfield Upholstery. It is good to hear they do good work.
I may do something similar for the exhaust. The estimate I received from Hardin Marine was $3200 - $3500 for stainless steel water jacketed risers (ouch).
Klint
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76Mantra455

  • Karma: +7/-0
Re: Over-the-transom risers
« Reply #3 on: June 04, 2021, 09:51:59 am »
Yeah that is expensive....check craigslist...what kind of engine you running?

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Professor_Porkchops

  • Karma: +0/-0
Re: Over-the-transom risers
« Reply #4 on: June 04, 2021, 09:35:26 pm »
I have a 455 Olds with Rochester Quadra-Jet and Offenhauser manifold. I will look on Craigslist. I also have access to TIG equipment and may put some risers together on my own.
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TrollerDave

  • Karma: +32/-0
Re: Over-the-transom risers
« Reply #5 on: June 05, 2021, 06:17:45 pm »
Hello all, I'm looking for some help here.

I have a 1973 Cutlass that my dad purchased new when I was young. It is in great shape for its age, but there are a few things I need to resolve.

The boat has log manifolds and over-the-transom risers that are completely water jacketed, which makes it nice for families. The biggest issue I have is that, after nearly 50 years, the exhaust tube has corroded, so water leaks from the jacket back into the exhaust and into whichever exhaust valve that is open (usually the #5 cylinder) - hydrolock - the very issue over-the-transom headers are meant to avoid.

I would like to replace the risers with something comparable, but I cannot find them anywhere. I will be sending Hardin Marine an email asking if the can custom-manufacture them as well. I would like to keep it as close to the current configuration as possible.

If anybody has a lead on who can supply these headers/risers, I appreciate it!

Additionally, where is the best place to have the interior re-upholstered? I am in Bakersfield, but I can travel if necessary.

Thanks

Klint

https://orangecounty.craigslist.org/bpo/d/stanton-over-transom-headers/7319880974.html

Just saw this on CL in Orange County. Worth checking out.


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Professor_Porkchops

  • Karma: +0/-0
Re: Over-the-transom risers
« Reply #6 on: June 05, 2021, 08:03:40 pm »
Great !
Thanks!
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