Engine is continued from previous page.
Order by phone at
Exhaust System Components
Marine Rubber Exhaust Elbows
Exhaust hose elbows let your wet-exhaust line make tight
turns without kinking. They provide excellent tolerance
to engine heat, vibration and back pressure. Install over
rigid tubing or pipe using the four included stainless steel
T-bolt clamps (two at each end, not shown). Not intended
for hose-to-hose connections. Lubricate with water or
detergent. 250F max. continuous operating temperature.
Wet exhausts only
to 250F continuous
Molded EPDM rubber
Use at least two stainless steel clamps, 1/2"W
minimum, at each end
316 stainless steel T-bolt clamps, 3/4"W,
18-8 stainless steel lock nut
Your wet exhaust system circulates hot gases and
saltwater, rapidly corroding its galvanized fittings,
which may ultimately crumble and vent dangerous
gases belowdecks. Trident's fire-retardant, heat-
resistant and corrosion-proof fiberglass connectors are the safe, low-cost
solution. Must be installed a minimum of 2' downstream from the point of cooling
water injection (250F max. continuous operating temperature).
Volvo Exhaust Hose
95mm ID x 160mm length. Replaces Volvo 834751-0.
SIERR# 18-2766 ShWt 1.7
Marine Rubber Hump Hose
These rubber hump hoses absorb more engine
movement, vibration and misalignment than
standard exhaust hose. Install over rigid tubing or
pipe using the four included stainless steel T-bolt clamps (two at each end),
downstream from cooling water injection. Lubricate with water or detergent only.
Wet exhaust systems only
-40F to 250F Max.
Molded EPDM rubber
Use at least two
clamps, 1/2"W minimum, at each end
316 stainless steel T-bolt
clamps, 3/4"W, 18-8 stainless steel lock nut
* Other sizes and reducing sizes available by Special Order.
Exhaust System Basics
Water-cooled inboard engines inject cooling water into the exhaust pipe, which
cools the exhaust and muffles engine noise. The exhaust then pushes the water
out the exhaust pipe. This is known as a wet exhaust system. Wet exhaust systems
have the advantage of using the heat-absorbing and sound-dampening qualities
of water to cool and quiet the exhaust. Air-cooled, or dry exhaust, systems are un-
common except in performance powerboats or large work boats where excessive
heat build-up and/or noise are tolerable, or in precisely engineered trawler/pas-
sagemaker exhaust systems which insulate the hot exhaust pipe with forced air.
Above- and below-waterline applications require distinctly different products to
muffle engine noise. Powerboats use marine mufflers, commonly made out of
non-metallic materials, to contain engine noise and cool the exhaust. Mufflers are
always mounted above the waterline, and usually have some sort of check valve
in-line to prevent backwards water flow, which might damage the engine.
Lift mufflers are used both by powerboats and sailboats. They are vertical
mufflers mounted below the waterline with an outlet line coming off the top of
the container. Exhaust and expended cooling water are mixed shortly after the
exhaust manifold and travel together into the Vernalift. This serves both as a
muffler and as a place for cooling water to collect before the exhaust pushes
it out the remainder of the exhaust hose. It also provides a place for seawater
from following seas to collect if the boat is running under sail. For greater qui-
eting, an inline muffler can be used downstream of a Vernalift.
Additional System Components
For vessels with through-the-transom exhaust, there are flapper valves that prevent
following seas from running back up the exhaust system and flooding the engine.
They clamp around the outside diameter of an exhaust pipe to form a check valve.
Exhaust hose or tubing is used to connect the exhaust manifold to the muffler
and runs from the muffler overboard. It is essential to use material which can
withstand heat, oil, acids, pressure, water weight and vibration without failure.
As a rule of thumb, hose runs that are longer than four times the inside diam-
eter of the hose should use wire-reinforced exhaust hose or fiberglass exhaust
tubing. Shorter lengths can use non reinforced hose. All hose connections
should be made to rigid surfaces (such as tubing, pipe, or the muffler itself);
hose-to-hose connections are never recommended.
Exhaust and water exit
Below waterline application
Above waterline application
Exhaust and water exit
Previous Page - Next Page
-2015-2016 Master Catalog
Choose a different catalog.