Water Cover O-Rings/seals

[static]

I just remanufactured my toasted under-carb insulator sheet, using this part number 1861T31 from McMaster-Carr:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

High temp, oil resistant Buna 12 x 24" sheet, 1/32 thick. Looks just like the factory supplied material. I have an extra sheet that I can send out if you want it.

Jim

 

[Andrew Shadow]

Not O rings, but related to this project--the rubber heat shield is pretty toasted too. Anyone cut a black silicone mat to shape? Perhaps more resilient than rubber, and generally heat resistant. The original piece is also unavailable.

Some people have made new mats from the below product. I have no idea how it worked out or it's durability.

Rubber Sheet Packing | Aircraft Spruce ®

Rubber Sheet Packing Will not deteriorate in petroleum products. Recommended for oil and solvent service.

www.aircraftspruce.com

Below is a link to a template with detailed dimensions to make the mat.

Rubber Heat Mat drawing (blueprint) - ST 1100 | ST1100 Related

Rob Veenendaal, a member of the Dutch language ST forum, has created a very professional blueprint of the rubber heat mat for the ST 1100. The document is attached, in PDF format. The dimensions are all millimeters. All the credit for this work goes to Rob, all I did was discover it. Michael

www.st-owners.com

 

[DeanR]

I just remanufactured my toasted under-carb insulator sheet, using this part number 1861T31 from McMaster-Carr:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

High temp, oil resistant Buna 12 x 24" sheet, 1/32 thick. Looks just like the factory supplied material. I have an extra sheet that I can send out if you want it.

Jim

Looks like the template above shows a width of 13.75 inches if I'm reading it right, while this sheet is only 12 in. wide.

 

[static]

This picture shows the remnants of my carb mat overlaid on the 12 x 24 piece of Buna. A bit narrower at some point, as DeanR indicates.

 

[cc2larke]

Yeah, saw that was a little narrow. Ordered 2' of the cut to length 36" to make up the difference.

After a little research, standard silicone gets destroyed by gasoline, so even though the heat tolerance is better, it's a poor choice unless you go to nitrile, which is what the McMaster stuff is.