Mercury 8hp 2 stroke exhaust

Baybasher

Recruit
Joined
Jul 17, 2012
Messages
2
Is there another exhaust outlet on Mercury 2 strokes besides the through the prop outlet?...motor is a 2002 8hp
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,544
Re: Mercury 8hp 2 stroke exhaust

Up at the top is usually exhaust relief ports. They are below the cowling on the rear of the engine at the top of the mid section. Usually 2 holes either round or rectangular. Purpose it to allow exhaust gasses to exit the engine without having to fight water pressure when the boat is at rest and the regular exhaust is several inches below the water line. Sometimes water/mist will come out with the gasses. At WOT there is usually a large volume of water that exits them....on some engines.

HTH,
Mark
 

Baybasher

Recruit
Joined
Jul 17, 2012
Messages
2
Re: Mercury 8hp 2 stroke exhaust

Up at the top is usually exhaust relief ports. They are below the cowling on the rear of the engine at the top of the mid section. Usually 2 holes either round or rectangular. Purpose it to allow exhaust gasses to exit the engine without having to fight water pressure when the boat is at rest and the regular exhaust is several inches below the water line. Sometimes water/mist will come out with the gasses. At WOT there is usually a large volume of water that exits them....on some engines.

HTH,
Mark

Thanks for the advice Mark, much appreciated!
 
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