[Weasel]

This is a Denso W27ESR-U.

Has 250hr Tach time and has been running LOP most of its life.

Is this what I should expect to see?

Note: center electrode is showing wear. Looks rounded off. All 6 plugs look the same.

 

[gasman]

Yes, replace them. The wear looks normal for the time.That gap looks a bit large. Keep the gap within specs. Set at minimum and readjust when they hit max gap. A gap out of max will strain the coils and cause coil failure.

 

[Radomir]

Normal.. as mentioned.. put iridium plugs as they don't wear nowhere near as much..

 

[RickWoodall]

Yup

I am at 260 hrs and just did my plugs, exactly like that. For $2.50 each I will just replace every 200 hours or so. Wish the mag plugs where that cheap.

 

[gasman]

I am at 260 hrs and just did my plugs, exactly like that. For $2.50 each I will just replace every 200 hours or so. Wish the mag plugs where that cheap.

Not any more for Denso..... You might want to try NGK..... Look good so far.

 

[Weasel]

Not any more for Denso..... You might want to try NGK..... Look good so far.

What P/N NGK is used? do you just use the standard NGK or the V-power NGK or some other model?

 

[Walt]

BR8ES (standard) or BR8EIX (iridium)

 

[bhester]

Solid cap

BR8ES (standard) or BR8EIX (iridium)

Get the solid cap plugs not the screw on cap. If I remember correctly they have a different number on the box for each or they just say solid cap or screw on cap they come both ways. I use the BR8ES and change them every year, they are cheap or should I say inexpensive.

 

[gasman]

BR8ES (standard) or BR8EIX (iridium)

Correct.... And a 9ES is cooler.