[T3] Spark plug gap

[73 squareback Cincy]

I always use bosch to. but their no where to be found in cincinnati. So 
ill see what happens i reckon :)
Chris537

On 7/2/2016 5:53 PM, Jim Adney wrote:
> NGK has a really great reputation, but Bosch has always worked for
> me. I don't know whether the NGKs you bought will be right for you or
> not.
>
> On 2 Jul 2016 at 17:48, 73 squareback Cincy wrote:
>
>> Jim its always been a oil burner engine but runs strong so im running it
>> till it dies. hehehe. I couldnt tell you the last time i changed the
>> plugs in it. probably back in 1999 or something. And it does have a
>> sorta of a miss. but its either the plugs or one of my linkages are off
>> by like 1 or 2 Degrees. I have them dialed in pretty close by ear and
>> driving it. Which i have done in the past. The more i drive it the
>> better it runs but just trying to freshen some parts on the ignition
>> side of things. Im gonna use some NGK BR6HS and dont understand the
>> readings since its been so long. but thats what was recommended to me.
>> So mise well give it a shot. If i shouldnt install those please let me know.
>> Chris537
>>
>> On 7/2/2016 5:31 PM, Jim Adney wrote:
>>> On 2 Jul 2016 at 16:53, 73 squareback Cincy wrote:
>>>
>>>> looks like its .024 in the bently manual.
>>> I'm sure .024 works, but I usually go to .027, mostly because that's
>>> one of the settings on my gapper and that opens up the gap a bit and
>>> also seems to work. If the gap gets TOO big, the spark will find
>>> other places to jump and you'll get misses. If the electrode corners
>>> aren't too rounded, it's often acceptable to just re-gap the plug and
>>> re-use it. I know that the plug makers say you have to replace the
>>> gasket/washer, but I've never found that to be necessary.
>>>
>>> It took me decades to understand what constituted a worn out spark
>>> plug. Look at the center electrode: When new, it's corners are
>>> square, which means very large electric field which breaks down
>>> easily (sparks easily). As the plug is used, the corners wear away
>>> and get rounded; Eventually the corners get so round that the spark
>>> won't form and jump the gap. Then the engine starts to miss. That's
>>> the time to replace the plug.
>>>
>>> If the insulator looks to be the wrong color, that's usually not a
>>> reason to replace the plug; that's a reason to look at your mixture
>>> (carbs or FI) or consider using a different heat range plug.
>>>
>>> Of course, if the insulator is broken, you'll need to replace the
>>> plug, but you also need to figure out WHY the insulator broke and fix
>>> that root cause. For the record, the only cracked insulator I've ever
>>> seen was on my snow blower, when I heated the plug with a torch to
>>> clean it off and heated the insulator too abruptly.
>>>
>>
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