Oil in spark plug well

TnTommy

Seaman Apprentice
Joined
Oct 12, 2025
Messages
36
Pulled plugs on 2000 50hp evinrude 4stroke to fog motor and the 1st and 3rd plug had a tiny bit of oil in the well the second had none dry as a bone. So should I be concerned about this? Here’s pic of plugs
 

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airshot

Admiral
Joined
Jul 22, 2008
Messages
6,085
Plugs look fine, but we can't see the plug wells where this oil collected....
 

saltchuckmatt

Captain
Joined
Jul 19, 2019
Messages
3,011
It’s the spark plug tube ya slide plugs into before ya screw them in
Now that's weird.

Please explain more. I figured you just ment the hole area of the head where the spark plug sits.

Plugs look fine to me as well.
 

airshot

Admiral
Joined
Jul 22, 2008
Messages
6,085
Now that's weird.

Please explain more. I figured you just ment the hole area of the head where the spark plug sits.

Plugs look fine to me as well.
Not common, but heard that term on ocassion. Many cylinder heads have a recess around the spark plug hole where crap often collects. Thus the reason for blowing around the plug before taking it out. Most just called it a plug recess but some referee them to wells. Just terminology depending on where you are.
 

saltchuckmatt

Captain
Joined
Jul 19, 2019
Messages
3,011
Not common, but heard that term on ocassion. Many cylinder heads have a recess around the spark plug hole where crap often collects. Thus the reason for blowing around the plug before taking it out. Most just called it a plug recess but some referee them to wells. Just terminology depending on where you are.
I wasn't referring to that term I was referring to the op's comment about "spark plug tube ya slide in"

Kind of lost me their.

That's enough for me over this thread. 🥴
 
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