Carb rebuild

[harleytq]

Was trying to get my carbs rebuilt for the holiday weekend and stripped out the head of one of the metering block screws.
Any tricks to getting that off now, and can I buy one of them screws from a hardware store?

 

[Bowser]

Trick to getting it off might be a manual impact driver. If there is no saving it you can buy a replacement metering block from OSD Marine for ~$25 with the screw + mylar valve together.
https://osdparts.com/index.php?main_page=product_info&cPath=595_602_1&products_id=914

I had to do the same thing since the screw holding the mylar valve was stripped too. If you don't want to buy a new block you might be able to drill it out and then jam a T10 torx driver and unscrew it if it holds.

 

[JC-SUPERJET]

Next time use a Japanese Industry Standard (JIS) Phillips Screwdriver or a Hand Impact Driver Phillips.

American Phillips are designed to cam out (slip). Mass Production feature so that the Assembly Technician never had to worry about over-torquing a Screw. The Screwdriver Tip just slips out or cams-out. Next!

The Japanese had a different approach where the Phillips was designed to handle more torque; thus the Screw Head Slots were manufactured deeper and at a different Angle. JIS Tips and Impact Driver Tips are the match.

Vessel Screwdrivers are good quality. JIS (Japanese Industrial Standard)

 

[newtomedoo22]

Same sort of thing happened to me today. I have the jis screwdrivers and they do work great, but one screw was stuck good. I took my 20v impact driver and a #2 phillips bit that I ground the tip off of just a wee bit and slowly hammered it out....slowly is the key word here

probably was a bad idea but it worked!

 

[harleytq]

Next time use a Japanese Industry Standard (JIS) Phillips Screwdriver or a Hand Impact Driver Phillips.

American Phillips are designed to cam out (slip). Mass Production feature so that the Assembly Technician never had to worry about over-torquing a Screw. The Screwdriver Tip just slips out or cams-out. Next!

The Japanese had a different approach where the Phillips was designed to handle more torque; thus the Screw Head Slots were manufactured deeper and at a different Angle. JIS Tips and Impact Driver Tips are the match.

Vessel Screwdrivers are good quality. JIS (Japanese Industrial Standard)

I actually started with the JIS screwdriver couldn’t get it to budge, then I tried an impact driver and stripped it out.

 

[POPPS]

Or,,,take your dremel,,,carefully cut a slot across the screw head,,,deep enough and wide enough for a sharp narrow chisel to fit in. Then,,,just slowly punch the edge of the screw,,,till loosens up…i find this to be far better than drilling.

 

[ezgoin92]

If you have a harbour freight near by this helped me a year or so ago. One set of hands to hold the carb second gives the screw a tap with this cheap-o tool. I didn't need (or want) to hammer it hard. The downward force and twist at the same time helped get it loosened. The e-bay set everyone talks about was the perfect upgrade to get rid of the standard screws.

6 Bit Impact Screwdriver Set With Case

 

[harleytq]

Thanks guy’s
I actually tried milling a slot, and tried a flat screwdriver, but no luck it stripped it again.
A friend at work seen me messing with it, and came up with the idea to weld a small piece of steel to the top of the head, so we could put a wrench on it.
Worked like a charm, I think the heat also loosened it up.
He definitely saved me, and the carbs!

 

[harleytq]

If you have a harbour freight near by this helped me a year or so ago. One set of hands to hold the carb second gives the screw a tap with this cheap-o tool. I didn't need (or want) to hammer it hard. The downward force and twist at the same time helped get it loosened. The e-bay set everyone talks about was the perfect upgrade to get rid of the standard screws.

6 Bit Impact Screwdriver Set With Case

What’s the eBay set, haven’t heard of it?

 

[ezgoin92]

I can't get into my ebay so no guarantee these are the same ones I purchased but the kit looks the same and they have sold a ton of them. The kit is a set of allen head replacement stainless steel screws which work great. It has made dealing with the carbs sooooo much easier and you don't have the fear of stripping a screw.
Mikuni Carb Stainless Screw Kit Super BN SBN 38 44 46 Seadoo Sea doo XP SPX GTX | eBay

 

[harleytq]

Ok one more question on this,
Checking pop off and it pops around 50 psi then drops some and holds,!but I’m seeing some bubbles, pressure not noticeably dropping on gage though.
Will it work like that or did I get a bad needle and seat? And need to try another?

 

[ezgoin92]

If you are seeing bubbles without a noticeable pressure drop my guess is there is the smallest of leak. May want to give the needle a 180 and see if it seats better. More experienced people cam prob give you a better take on it.