DUI distributor problem

dwna1a

dwna1a

Well-Known Member
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Apr 23, 2012
5,981
James River
Boat Info
88 Weekender 300 "Seahorse"
Engines
Twins 350
Simple issue I hope. I bought a DUI Bluetop 7000rpm max. Today I got a DUI Red 10000rpm max. It took four months to get the wrong one. Can I still use a high performance distributor in my old 350’s?
 
Davis is a good company. I would say your fine depending on the curve ,the advance curve in the distributor
 
Davis makes real nice distributors, but that is a waste in a standard 350. But I put one in my C3 Vet ...
 
Well if he already has it and the curve will work. Why not use it
 
I do have it here I’m just concerned is all. Sky, if you can get me the DUI 7000 Marine I will trade
 
Wow that's not coast gaurd approved
 
If they are marine distributors they are safe correct?
 
dwna1a said:
If they are marine distributors they are safe correct?
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I am surprised to see they are not USCG approved. But I put a set into an 80's Trojan, friends boat, and never had any issues. But I have only really used them in cars. They were a go to back then.

HEI distributors have there place, but I really like the marine Mallory's for a gas engine(s) of that era. But to be honest I see them as being safer then the conventional coil and dist. packages. There is one less sparking lead. The only thing I can say is the pickup sensor does go bad in them and will take out the ignition module. The pickup is an ac generator that goes bad and goes into over voltage and kills the module, and why I prefer the marine Mallory's instead. HMO though.
 
We used to call them unilite because they never work. Used to lite once hence the name uni lite
 
Distributors don't emit a spark. The EST used by Merc for many years is the exact same one the auto industry used.
 
scoflaw said:
Distributors don't emit a spark. The EST used by Merc for many years is the exact same one the auto industry used.
Click to expand...

HEI's do, internal coil, and is what I was referring too. But sorry I should have said conduct ... Splitting hairs on that one.
 
Scott215 said:
Always used MSD
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Point's based back then were the best , you would hardly ever get stuck. When Crusader came out with their electronic ignition boats were getting towed in a lot. I would swap out the dist. for a pointed Mallory and sometimes put a Pertronix ign. module in at the owners request.
 
I grew up with the msd 6 and 7al all high dollar stuff 30 years ago
 
Ok so what’s the difference between “Marine” and USCG approved
 
dwna1a said:
Ok so what’s the difference between “Marine” and USCG approved
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Anyone can put the word marine on a part or component. It’s a marketing term. If the USCG approves a device then it meets their safety standards for use on a boat.
 
dwna1a said:
Ok so what’s the difference between “Marine” and USCG approved
Click to expand...

So marine means it's approved for use in the "marine" environment meaning marine approved distributors are designed to meet or exceed SAE J1171 standards. Not just a marketing term.

USCG approved means it's been tested by and in accordance with the USCG regs. It's an extra cost to be approved by the USCG and maybe why they didn't go the extra step.

SAE J1171 covers external ignition protection for all electrical devices that will be used in marine engine compartments and fuel tank spaces.
 
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