Table of Contents
Why do boats use wet exhaust?
Water-cooled inboard engines inject cooling water into the exhaust pipe, which cools the exhaust and muffles engine noise. 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.
What is a dry exhaust?
Dry exhaust systems are by necessity metallic, making them heavy. Coolant is circulated through the keel cooler, making the water in which the vessel floats in effect the “heat exchanger.” No raw water is needed to cool the exhaust, making it possible to do away with all engine-associated raw water components.
Where does the exhaust come out on an inboard?
Inboard Engines: Outboard engines will discharge exhaust gases underwater, typically through the propeller, while the exhaust from inboard engines appears just above the waterline, along with the discharge of cooling water.
Should outboard exhaust water be out?
Yes, water should come out of the prop hub with the exhaust.
When should powerboats use muffler?
When do powerboats need a muffler? Every boat equipped with a motor other than a stock (unmodified) outboard engine must have a muffler and use it while operating within five nautical miles (9.26 km) of shore.
How does a wet exhaust muffler work?
Wet Exhaust System. A water cooled boat exhaust muffles engine noise. By injecting cooling water into the exhaust pipe, the noise quietens. The water is transported from the water-cooled inboard engines and then pushed out of the exhaust pipe by the exhaust.
What is the pee hole called on an outboard motor?
Water Pump Indicator Hole (Pee hole)
What will prevent the ignition of gasoline fumes?
Backfire flame arrestors are designed to prevent the ignition of gasoline vapors in case the engine backfires.
What is the purpose of a white buoy?
Boats Keep Out: A white buoy or sign with an orange diamond and cross means that boats must keep out of the area. Black lettering on the buoy or sign gives the reason for the restriction, for example, SWIM AREA. Danger: A white buoy or sign with an orange diamond warns boaters of danger – rocks, dams, rapids, etc.
Is it bad to lay a boat motor on its side?
It’s almost never a good idea to lay an outboard motor down on its side or back. Mercury Marine recommends upright storage to allow the water to drain from the motor, but Mercury also says that a motor may be stored on its side after the water has drained completely.