Sparkplug adapter for mityvac?

[Spring1898]

Got a couple of 272's which spike RPM out of the cut and after being held wide open for a bit. Looks like the impulse line is built into the intake boot.

Is there a sparkplug hole adapter that I can get for the mityvac?

Or another way to comp test these types of saws?

 

[WolfMann]

Should be able to find a vac fitting for spark plug hole. Can also make one out of an old plug by knocking out electrode.

 

[WolfMann]

Or something along those lines, I'd look it up, there's a thread on here somewhere...

 

[WolfMann]

http://www.baileysonline.com/Chains...2-OEM-Spark-Plug-Adaptor-503844002.axd?catID=

 

[WolfMann]

That's probably what your looking for.

 

[CR888]

I made my own 10mm & 14mm with old spark plugs and JB welded a barbed brass fitting for the hose to go on. Getting the electrode out can be a real pita on some plugs, easier on others. Probably best buying them for a few box.

 

[Spring1898]

Yep picked up one of those last night

 

[Welder56]

I gently knocked out the spark plug end and soldered a barb to the nut part of the plug

 

[WolfMann]

Good one Welder56.

 

[Vintage Engine Repairs]

View attachment 679964 I gently knocked out the spark plug end and soldered a barb to the nut part of the plug

If you ever do one again ‘d love to see a tutorial!

 

[Mad Professor]

new link to baileys adapter.

https://www.baileysonline.com/catalogsearch/result/?q=+Spark+plug+adaptor

Save an old plug, make your own. Use a stepped adapter so it will fit various hose sizes.

If metal solder is best, if plastic use JB weld

 

[Vintage Engine Repairs]

new link to baileys adapter.

https://www.baileysonline.com/catalogsearch/result/?q=+Spark+plug+adaptor

Save an old plug, make your own. Use a stepped adapter so it will fit various hose sizes.

If metal solder is best, if plastic use JB weld

How do you get all the bits out of the plug?

 

[Mad Professor]

How do you get all the bits out of the plug?

Break out the insulator. It's ceramic and will crack. Snap/grind off , ground electrode.

Get o-ring to replace sealing washer.

 

[Vintage Engine Repairs]

Break out the insulator. It's ceramic and will crack. Snap/grind off , ground electrode.

Get o-ring to replace sealing washer.

Thanks Haha you won’t believe this but I’m bashing it with a hammer and the porcelain won’t break ! Will do it in the morning when I don’t have to worry about waking neighbours!

 

[jrs_diesel]

There's an easier way. Grind off the upper shoulder of the metal collar, all the way around the plug, and the insulator will just fall out. The attached picture has an arrow pointed to where you need to grind away.

At the factory, the center electrode and insulator are inserted into the outer collar, then the upper edge is rolled over to crimp and lock in the insulator.

 

[Vintage Engine Repairs]

There's an easier way. Grind off the upper shoulder of the metal collar, all the way around the plug, and the insulator will just fall out. The attached picture has an arrow pointed to where you need to grind away.

At the factory, the center electrode and insulator are inserted into the outer collar, then the upper edge is rolled over to crimp and lock in the insulator.

Ooo awesome! I’ll use the dremel

 

[CR888]

I made mine a few years ago and remember being heavy handed with the hammer & a punch I think..But some brands were easier than others. Get barbed fittings that fit your mityvac tube & some JB/epoxy.