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External flappers are available at most boat stores and
marinas. They are modestly priced and a spare set can
be easily stowed in the boat.
Internal flappers come in many different styles and are
usually only available through the manufacturer of the
exhaust tip.
marinas. They are modestly priced and a spare set can
be easily stowed in the boat.
Internal flappers come in many different styles and are
usually only available through the manufacturer of the
exhaust tip.
| Exhaust Flappers |
Exhaust flappers are an important
component in the engine.
Flappers are required to keep water from
entering the exhaust when the boat
operator cuts the power at speed
("following seas").
Flappers are extremely important when the
boat is sitting in a slip or beached with the
engine shut-off. Waves and wakes can fill
up an engine very quickly.
The exhaust flappers should be inspected
and replaced regularly.
External flappers can be inspected at a
glance and changed with a screwdriver
(while the boat is in the water!).
Internal flappers can not be changed so
easily! The boat needs to be pulled from the
water and the exhaust tips need to be
removed from the transom!
component in the engine.
Flappers are required to keep water from
entering the exhaust when the boat
operator cuts the power at speed
("following seas").
Flappers are extremely important when the
boat is sitting in a slip or beached with the
engine shut-off. Waves and wakes can fill
up an engine very quickly.
The exhaust flappers should be inspected
and replaced regularly.
External flappers can be inspected at a
glance and changed with a screwdriver
(while the boat is in the water!).
Internal flappers can not be changed so
easily! The boat needs to be pulled from the
water and the exhaust tips need to be
removed from the transom!
Internal flappers add considerable
amounts of restriction to exhaust flow.
External flappers do not make noise like
rubber covered metal internal flappers.
amounts of restriction to exhaust flow.
External flappers do not make noise like
rubber covered metal internal flappers.
The mufflers are 10 inches long
with 5 inches inside the flange and
5 inches outside of the flange.
with 5 inches inside the flange and
5 inches outside of the flange.
Exhaust Tip Kit
two tips with flappers
580-3-101 $175.95
two tips with flappers
580-3-101 $175.95
The inlet to the muffler is tapered to
funnel the exhaust gases into the
muffler from the 4 inch rubber exhaust
hose.
funnel the exhaust gases into the
muffler from the 4 inch rubber exhaust
hose.
The muffler has a 4 inch outside
diameter with a 2-1/2 inch inside
diameter.
The muffler core is perforated and
packed with stainless steel and
silences without restricting exhaust
flow.
The tapered outlet reduces the
"rushing air noise" as the fast moving
exhaust gases exit the muffler.
diameter with a 2-1/2 inch inside
diameter.
The muffler core is perforated and
packed with stainless steel and
silences without restricting exhaust
flow.
The tapered outlet reduces the
"rushing air noise" as the fast moving
exhaust gases exit the muffler.
| Stainless Steel Thru-the-Transom 4 inch Exhaust Mufflers |
| The exhaust tips come with external flappers. |
| Exhaust Tips |
When installing thru-the-transom exhaust the "Y" pipe
should be removed and the hole in the transom assembly
covered with a block-off plate.
should be removed and the hole in the transom assembly
covered with a block-off plate.
| Stainless Steel Thru-the-Transom 4 inch Exhaust Tips |
Muffler Exhaust Tip Kit includes two tips
with flappers 595-3-002 $175.95
with flappers 595-3-002 $175.95
External Flapper 4"
89250 $16.95
89250 $16.95
| The exhaust mufflers come with external flappers. |
| "Y" Pipe Block-Off Plate |