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 Catalina/Capri 25/250 Sailor's Forums
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glivs
Admiral

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USA
822 Posts
Initially Posted - 03/16/2019 :  16:26:15  Show Profile  Reply with Quote
Tis the season to start planning/stocking parts. I am no mechanic and plead totally naive with regard spark plugs. My outboard manual recommends NGK DCRP6E plugs. A quick search by that description yields at least 16 different models ranging from "Traditional" ($4.52) to some special version at nearly $13. Are Iridium plugs ($7.67) worth the money? From distant memory I recall some plugs are built to minimize rf although in my quick search this evening I did not see anything along that line mentioned. Thoughts/experience appreciated.
Gerry & Leslie; Malletts Bay, VT
"Great Escape" 1989 C-25 SR/WK #5972
Edited by - glivs on 03/16/2019 16:30:12

islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 03/16/2019 :  17:48:16  Show Profile  Reply with Quote
My advice is to go with the standard (traditional) NGK plug that was designed by the engineers to be used in your motor. Radio interference is a thing from the past. Modern plugs have that protection. If that NGK # is what the manufacturer calls for then why second guess them.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


Edited by - islander on 03/16/2019 17:52:16
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glivs
Admiral

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USA
822 Posts
Response Posted - 03/16/2019 :  19:35:07  Show Profile  Reply with Quote
Thanks Scott...yes I added the "Traditional" model to my shopping list; just curious about the number of variations of the same model plug.
Gerry & Leslie; Malletts Bay, VT
"Great Escape" 1989 C-25 SR/WK #5972
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Voyager
Master Marine Consultant

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USA
5231 Posts
Response Posted - 03/17/2019 :  06:27:15  Show Profile  Reply with Quote
Marketing hype, perhaps? A way to separate a boater from their money? Or selling peace of mind?
Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain — Milford, CT
Edited by - Voyager on 03/17/2019 06:27:48
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 03/17/2019 :  08:58:59  Show Profile  Reply with Quote
Mostly unless you are building a high performance race engine or you just never change the plugs then Iridium coated plugs might be a benefit. Iridium is part of the platinum family of noble metals and is the hardest. Is there a benefit? Yes under certain situations but our little engines don't warrant the use of them and would be a waste of money.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.