How to remove (carb) screws with stripped heads?

I tried a search and wasn't finding what I needed.

But what do I need to remove screws with the heads stripped out. I have top sides of the carbs where the diaphragm is, that won't come off due to someone previously trying to remove them and stripping them out. There's only two that are messed up.

Thankfully the rest of the jets screws all seem movable and I picked up some yamaha carb dip and cleaner today.

TIA

 

Get a set of easyouts.
I had the same problem, bought easyouts off of ebay and got the little devils out no trouble. Just make sure you have replacements.

Faighaigh.

 

Your other option is to drill them out and re tap the threads

 

If you get easy outs, get the spiral kind, not the square kind that bite at the four corners. Left handed drill bits also work. (A store clerk once thought I was kidding her when I asked for these.)

To prevent further damage when removing these screw, make sure you're using a well fitting screw driver--i.e., the proper size, not worn out...etc. For the jets--especially the pilot jets and mixture screws--make sure the fit is perfect. Perfect. Grind, file or gnaw, a perfect fitting flat head for each job. Use plenty of penetrating lube. If if still won't move, get out the heat, making sure you don't melt any rubber parts.

You may want to use some heat with the easy outs. You only get so many tries with them, untill there's no fastener left to bite onto.

 

If you get easy outs, get the spiral kind, not the square kind that bite at the four corners. Left handed drill bits also work. (A store clerk once thought I was kidding her when I asked for these.)

To prevent further damage when removing these screw, make sure you're using a well fitting screw driver--i.e., the proper size, not worn out...etc. For the jets--especially the pilot jets and mixture screws--make sure the fit is perfect. Perfect. Grind, file or gnaw, a perfect fitting flat head for each job. Use plenty of penetrating lube. If if still won't move, get out the heat, making sure you don't melt any rubber parts.

You may want to use some heat with the easy outs. You only get so many tries with them, untill there's no fastener left to bite onto.

 

Vice grips on the head of the screw work as well.

 

If the top of the phillips head is stripped, take a center punch and on the outside of the screw carefully punch a divit on the side of the screw. Now go and tap the screw with the centerpunch in that divot in the direction you want to unscrew it. It should pop free and you can now remove the screw and use a new one. Also if its the diaphragm top and you only have one screw left to unscrew just turn the cap in the direction to loosen the screw.
To prevent future screws from being stripped carefully tap the screwdriver using a correct #2 phillips head driver with a good tip with a hammer. This gentle tap breaks the bond that the aluminum has on the steel screw. Just be carefull not to tap too hard, the aluminum will break. Nice thing tho that it can be welded back up. Yup been there done that and I have the t-shirt
Hope that helps
Sean

 

I've also used a hacksaw to cut flathead grooves

 

First:

I use the ViceGrip Method already suggested. You should file a "Flat" that the Lock-on's won't slip off from.

Next:

I use a thin-disc Dremel cut-off wheel and make a slot to get a screwdriver in to. Followed by decapitation and removal from the bottom if that don't get it out.