NO-LEAK MANIFOLD O-RINGS:
I recently searched for replacement o-rings
for the no leak manifold. Not that mine were
degraded but I agree with those who are convinced
that repeat exposure to fuel and heat means that
regular (at least annual) replacement is part of
routine maintenance.
While I never found a Web store where the item was
specifically listed, I noticed that Maston's Web
store has a page with an assortment of o-rings
displayed.
http://www.mastonsrcmarine.com/
Decided to call Maston's and not only do they have
them but they have choices of materials in the two
sizes needed. I went with the brown / white o-ring
combo that Maston's is recommending.
Here are some notes I have on how the two o-rings are
installed.
1. The 3.0mm o-ring slips on the header.
2. The 3.5mm o-ring inserts in the outer flange
3. Place an exhaust manifold gasket (fiber or metal
bonded) between the manifold and the cylinder
4. Install two screws - anti-seize compound optional
Note on the exhaust manifold gasket - getting good
results here with the Super Heavy Duty Steel Reinforced
Graphite Exhaust Gaskets (big name for little part)
part # (fd227) - from Dave's Discount Motors. The gasket
never sticks, seals well and maintains it's original
thickness.