MSD coil packs on 496HO
 

Anyone ever run the automotive coil packs, MSD part number 82648? I need to replace a bunch of them due to rust.

Unless your going for looks and a lighter wallet there is no benefits vs stock IMO. The stock square ACDelco D581 coil packs have been proven in stock and 600+ hp 8.1l builds. They can be had online for around $35.

Awesome, thanks! My shop wanted $140 a piece for the Merc ones! 😳 Didn't realize the Delco's were OEM...

Yup, $190+ for set of 8 AcDelco D581's..

https://www.amazon.com/s/ref=nb_sb_n...keywords=+D581

And there is 2 different generations of coils used for the 496. Gen 1 can be a prob sometimes for going bad.

It's running great right now, but on some of them the metal layers are starting to corrode and spread apart a bit... figured how's the time to change them before they start going bad...

496 Mag Coil packs D581 or D580
 

I was looking at replacing the coil pack on my 375 hp 496 Mag (2002) and saw this thread. However, my coil packs look like Delco Automotive D580 not the D581 (Square type but both the PCM plug and spark plug wire on the same side).

Any advice?

thank you

I have a set new never used if you’re interested,bought a new replacement engine a while back and it was fully dressed,

Just buy His above. ebay and amazon lovers are buying the CHINA knock offs ignition coils and the same for spark plugs and fuel injectors. NGK, Denso, Delphi and AC Delco getting hit hard with CHINA knock offs parts actually more knock offs parts for sale that the original currently. I promise I know what I am talking about here. It is so bad now that these companies are sending out memos and online videos and even youtube videos about the knocked off parts.

CHINA has even knocked off the Mercruiser IAC as well. NO BS. They are selling for 45 to 75 bucks online. Have a Merc racing 600 sci in that the IAC knocked out the PCM 555 and that IAC was bought on Amazon over the winter. I trace it back and its orgin was China.

Like I said it so bad for cheap knock off parts that all are putting it on their own websites. Like I said all you ebay and amazon lovers buy away from unknown sources and unknown manufacturing sources.. Best of luck cause your going to need it. I have nothing to gain by telling anyone these statements except less issue with your boat and engines.

https://www.acdelco.com/counterfeit-auto-parts

I can go on for months about this

https://www.acdelco.com/content/dam/...it-article.pdf

double post

Thanks BUP and Boatnt
 

Boatnt and I contacted each other and I bought more than just his coil packs. I appreciate all the help on this forum!

Good to know about the knock-offs as well. I was on my way to making a mistake. I will be getting a refund from Amazon. :)

I will also have a more reliable vessel to boot!

It is so bad that NGK lists 3 down in their index top left. We started to see this 5 years ago on the marine side for spark plugs. It seemed like one out of 8 spark plugs were bad right out of the box from owners whom bought spark plugs online. At that time we even had a NGK rep stop by in person to see what was going on. He took all 8 spark plugs back with him. about 2 weeks later he called me and said we have a counterfeit issue taking place and that's all he could report. That same rep is retired currently.


70 to 75 percent min of NGK spark plugs are counterfeits sold online. 85 percent of fuel injectors online for marine apps are knock offs. 85 percent of them that is correct let that sink in. One example -- The China market sells the marine Bosch knockoffs for 5 bucks per injector to USA sellers who inreturn sell on ebay and amazon.. I know this first hand NO BULL Chit. I can prove this cause I have them in my hands and the China market hits me up all the time to buy their Fuel injectors. They actually send me their catalogs and price sheets. You would be shocked that they have pricing as low as 3 usa dollars per injector buying in quantity. I can prove that as well. I do not sell any CHINA made injectors period. EVER and I will stand by these statements here 1000 percent.

The ignition coils online for any LS and the IGN 1A most online are knock offs. 50 dollars and under for a new OEM coil with free shipping -- 99 percent its a Knock off. Call an AC Delco / or a distributor dealer and ask them how bad it is


Anyways NGK has a huge issue on their hands. I reported this before elsewhere.


PLUG STUDIO / NGK

This is put out by NGK

What mistake ? Do you have a link ?

1000 percent counterfeit CHINA knock offs . came from the link posted in the past These would be a mistake 8 coils shipped for under 100 bucks. right I have ocean front property in Phoenix AZ for sale as well. 12.50 cents for coils right.

Those aren’t AcDelco coils and they don't even claim to be.

AA Ignition is listed as manufacturer and GWA Auto Parts as reseller. Never heard of either.

Chesp knockoffs ? Sure. Counterfeit ? No.

AcDelco is partnered with Amazon, you can buy genuine AcDelco parts thru them.

Buying thru a reseller on Amazon isn’t always a good thing unless you know them well and can check the box and part itself to see if real.

Anyway, person I quoted was whom I asked that question as it sounded by his comments he was going to buy counterfeit Delco parts. I wanted to see it.

I get what you’re saying, but I’ve replaced quite a few mercruiser iac’s and a few ecm’s because of the iac failures. Doesn’t seem like there’s anymore risk with the cheap ones? At least if the cheap one fails and takes out the ecm you saved a few bucks in the mean time.