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 Autolite Iridium plugs

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Maxi-Scooter Rider
Maxi-Scooter Rider

Number of posts : 182
Age : 75
Location : Saint Augustine FL
Points : 2020
Registration date : 2016-05-15

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PostSubject: Autolite Iridium plugs   Autolite Iridium plugs I_icon_minitimeThu Jun 30, 2016 10:57 pm

My "new-to-me" 2006 S'wing had 9100 miles when I got it in mid-May and earlier this week with 10,500 on it I felt I should change the spark plugs which were likely original. Having run an iridium plug for over 5 years in my 2003 Burgman 400¹ I sought out iridium alternatives for the stock nickel-chrome conventional plugs and found Autolite's XS4303 iridium plugs for $5.99 each at O'Reilly's. Not stocked locally but they had them the next morning.

The original plugs did not look bad:
Autolite Iridium plugs OriginalPlugs-01

The gaps were worn a bit, 0.038" and 0.037", but probably re-gapped they had another 5k to 7k in them if one wanted to be frugal.

So; with the Autolite iridiums idle and lower rpm running are noticeably smoother, and higher rpms are definitely smoother.

Of course a new set of conventional plugs would have likely have had the same effect--the proof will be "in the pudding" 10k miles from now.

BTW, a nifty tool to have is a torque-limiting plug socket:

Autolite Iridium plugs SparkPlugSocket-01

They are available in various torque values and hex sizes, somewhat curiously I have found the 16 Nm (11.8 lb·ft) 5/8" socket to be nearly universal for 10 mm gasketed and 14 mm taper seat plugs--spot on for the S'wing, and close enough on the other vehicles we own (a 2003 Mustang Cobra, 1998 Mercedes SL500 and a 2003 Toyota HIghlander).

¹ - I ran an Autolite iridium plug for over 45k miles on my '03 Burgman 400--with no performance issues of any sort.
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Silver Wing Guru
Silver Wing Guru

Number of posts : 2658
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PostSubject: Re: Autolite Iridium plugs   Autolite Iridium plugs I_icon_minitimeThu Jun 30, 2016 11:40 pm

Don't forget to use some aluminum anti-seize on those plugs. It improves the electrical grounding and prevents the plugs from galling in aluminum heads.
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Site Admin

Number of posts : 1964
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PostSubject: Re: Autolite Iridium plugs   Autolite Iridium plugs I_icon_minitimeFri Jul 01, 2016 8:00 am

I installed the NGK Iridium plugs in both my Wings and could not be happier. Haven't tried the Autolite ones but I am sure they will be fine!
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