killing plugs
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jackpot
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anyone any ideas why i keep killing spark plugs,and not just one make of plug,2 last week and 1 today after about 25 miles.they're still sparking but with about 3 sparks going back into the plug and not jumping the gap,HELP PLEASE
ON MY SCOOT OR NOT AT ALL
possibly detonation, and its cracking the porcelain insulator.
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jackpot
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should cracks be visible ?,plugs look mint.it's running rich on the bottom end but surely that can't cause it[it goes back up to dans next sat] at this rate i'll need 3 or 4 plugs to get thereJ1MS wrote:possibly detonation, and its cracking the porcelain insulator.
ON MY SCOOT OR NOT AT ALL
No there not normally visible unless the insulator shatters at some point, my guess is if its just a little bit of detonation & the scooter is possibly a little rich. Then the plug tracks to earth inside the insulator giving a very insufficient spark at the tip till it doesn't spark except through the insulator, then it cuts out or just fails to kick up after you stop.jackpot wrote:should cracks be visible ?,plugs look mint.it's running rich on the bottom end but surely that can't cause it[it goes back up to dans next sat] at this rate i'll need 3 or 4 plugs to get thereJ1MS wrote:possibly detonation, and its cracking the porcelain insulator.
This really is only a guess and I'm not even sure its whats wrong with yours, just a possibility... I'm sure Dan will put it right, whatever the problem is...
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sean brady scooters
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wrong grade plugs,thats all.
Sean Brady Scooters - 01765 690 698
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jackpot
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ngk 8,ngk9,nippon denso forget the number without going in garage but the correct equivalent,they can't all be wrong ?sean brady scooters wrote:wrong grade plugs,thats all.
ON MY SCOOT OR NOT AT ALL
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Andy Pickering
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Would it be something like faulty CDI, faulty stator sending to much power as in a surge and the weakest link being the plug..bit like a light bulb blowing after power surge..?
Ricspeed, gone but never forgotten RIP my friend #59
You could try gaping the plug down to a very small gap, about 12 thou and see if it helps, if it does then its possibly a weak spark, Dan is possibly right, maybe wrong plug grade might be the problem.
But as I said, I am only guessing, and I'm probably miles off with my guesses...
But as I said, I am only guessing, and I'm probably miles off with my guesses...
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red
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3 vapor speedos ,then 3 spark plugs!!
What's next?
Not cranks as you've already done more than 3
What's next?
Not cranks as you've already done more than 3
I do not try to explain why I ride Lambrettas,
For those who understand, no explanation is necessary,
For those who don't, no explantion is possible.
For those who understand, no explanation is necessary,
For those who don't, no explantion is possible.