Riser gaskets

[GasCan II]

When changing out exhaust manifold risers on a Mercruiser 350 cloosed system schould I use any sealer ? Theese are M/C graphite block off gaskets. If so what sealer schould be used ?
I've read all the older posts on this but no one had graphite gaskets.
Thanks alot.

 

[Don S]

Re: Riser gaskets

No sealer necessary. Here is the service bulletin for the graphite coated gaskets.

View attachment 99_10 Exhaust Gaskets.pdf

 

[GasCan II]

Re: Riser gaskets

Thanks Don for the quick reply;
Will get the job done on the first warm day.
Thanks again.

 

[jerryjerry05]

Re: Riser gaskets

If your just changing the risers??/
Make sure the mating surfaces are clean and smooth and the edges sharp/square.
Post a pic??