Carb issues, Zeda 100

[ImpulseRocket]

DUH! you're supposed to check the ring in the bore for a match, not on the piston. That way you can measure the end gap and then decide on using it. I mean, if its got a 1 mm gap, why even bother?

Pffft. 1mm is only 4 times the gap it should have. What could go wrong?

 

[Corp]

DUH! you're supposed to check the ring in the bore for a match, not on the piston. That way you can measure the end gap and then decide on using it. I mean, if its got a 1 mm gap, why even bother?

I genuinely could not find a 50 mm x1. 5 ring. I settled with the 49

 

[Corp]

I run both styles of plug. I've never noticed a difference between the two as long as they are both genuine plugs. The only difference between them is the length of the threading and size of the ceramic body -made a bit smaller because they go on small engines with shrouds. I would love to see you make the claim that the saw plug hurts performance after you get this engine to even run properly. Until then you are just throwing accusations at parts with little to no data to back it up. You could have simply received a bad plug, or a cheap copy chinese plug sold as a genuine NGK. It happens a lot more than you think.

My thought process was that the plug was genuinely not long enough to even poke out of the bottom of the ZEDA head. It's a one piece head so I assume the top part is thicker by design. The strap of that saw plug was tucked inside the head where as the stock plug stuck out a bit towards the piston. It could have also been that I put a brand new plug in when I was used to a dirty used plug too but it definitely ran better with the longer threaded plug.

 

[Sloppyslopster]

My thought process was that the plug was genuinely not long enough to even poke out of the bottom of the ZEDA head. It's a one piece head so I assume the top part is thicker by design. The strap of that saw plug was tucked inside the head where as the stock plug stuck out a bit towards the piston. It could have also been that I put a brand new plug in when I was used to a dirty used plug too but it definitely ran better with the longer threaded plug.

By any chance did you notice the power difference in plugs with the weird ring put in? If so the saw plug would hinder power since it would be lower compression.

 

[Corp]

By any chance did you notice the power difference in plugs with the weird ring put in? If so the saw plug would hinder power since it would be lower compression.

Oh sorry for the confusion. The smaller ring was for the ebay engine. I'll be never use that thing again. I actually did use the saw plug in that engine too but it's head is much thinner

 

[ImpulseRocket]

My thought process was that the plug was genuinely not long enough to even poke out of the bottom of the ZEDA head. It's a one piece head so I assume the top part is thicker by design. The strap of that saw plug was tucked inside the head where as the stock plug stuck out a bit towards the piston. It could have also been that I put a brand new plug in when I was used to a dirty used plug too but it definitely ran better with the longer threaded plug.

Possible. You could measure the depth of the threads and easily find out. In my experience the standard B series plugs are too long for most of these heads.

 

[Corp]

Possible. You could measure the depth of the threads and easily find out. In my experience the standard B series plugs are too long for most of these heads.

Oh, yea that saw plug is literally half the length as the stock plug /ngk plug they recommend.

 

[Chainlube]

I genuinely could not find a 50 mm x1. 5 ring. I settled with the 49

Go longer and file it off to obtain the right end gap.

 

[ImpulseRocket]

Oh, yea that saw plug is literally half the length as the stock plug /ngk plug they recommend.

The threads are only 1/8th inch shorter, or .125 of an inch. it's not a huge difference. The electrode is also projected 1.5mm or .06" further out from the end of the threads to put the electrode back into the chamber more. It's a give and take.

 

[Corp]

The threads are only 1/8th inch shorter, or .125 of an inch. it's not a huge difference. The electrode is also projected 1.5mm or .06" further out from the end of the threads to put the electrode back into the chamber more. It's a give and take.

Maybe I bought the wrong plug. Using my calipers I measured the saw plug to be 14.7 mm from base of washer to bottom of strap.
The stock plug is 18.4 mm.
Using a rudimentary method of marking a hex key I measured the thickness of from plug mating surface to the bottom of the top portion of the head to be 15.9 mm.

The 2 piece normal style head of the ebay engine is only 11mm thick!! The saw plug would have worked fine on that head but it seems the zeda head is much thicker