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Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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July 29, 2026, 02:05:20 AM |
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bvparr
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Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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April 13, 2019, 11:43:39 AM »
Hello - Just looking for a little help. Just had a mild 454 built for my Hawaiian. It's .40 over and a full roller. Mild cam by SLR. So here is where I am at - I have the original Hardin Marine logs and snails that came with the 1978 boat. They are in great shape. I also have the Mercruiser 89011 exhaust manifolds with the 816900-C 4" risers. They are also in great shape. The question is if they are your ONLY choices - what ones would you use?
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mash on it
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Re: Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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Reply #1 on:
April 13, 2019, 12:38:02 PM »
If interior room or doghouse is not a problem, merc manifolds.
Merc manifolds are heavy, compared to logs and snails.
Logs and snails are not as bad as people think.
Dan'l
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CJ/RR 212...under construction "Pistol Annie"
bvparr
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Re: Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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Reply #2 on:
April 13, 2019, 06:06:37 PM »
Oh that's right - I need to make sure there is room under the hatch. Thank you for your input.
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Tahoe540
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Re: Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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Reply #3 on:
April 17, 2019, 07:29:35 AM »
I am repowering my jet boat and have no room but for anything but log exhaust because of the doghouse/engine cover. This is very limiting on a 555 BBC. You can cut off the ends I guess to get a full 3"?
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Boat #1: 1984 Hallett BR
Boat #2: 1990 Advantage offshore
bvparr
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Re: Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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Reply #4 on:
April 17, 2019, 09:02:54 AM »
Yes. I did that to them already. So if the risers do not fit that is what I am going to put on.
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el mojado
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Re: Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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Reply #5 on:
April 24, 2019, 10:55:17 AM »
My $.02
When I cut off mine I noticed there was a small lip just on the inside. I took my air grinder with a carbide bit and ground it off to get as much of an exit as possible. Every bit counts.
Sent from my SM-G950U using
SoCal Jet Boats mobile app
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I once tried to NOT have a good time. It just didn't work out!
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Original Hardin Marine Logs/Snails OR Mercruiser 4" Center Riser Exhaust
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