Mercruiser 3.0

Aquatron

Petty Officer 3rd Class
Joined
Apr 17, 2011
Messages
76
What will happen if you run the boat without the exhaust bellows? Just a question that I?m trying to answer for someone that has been running there Mercruiser 3.0 for 2 years WITHOUT a bellows.
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,452
Re: Mercruiser 3.0

What will happen if you run the boat without the exhaust bellows? Just a question that I?m trying to answer for someone that has been running there Mercruiser 3.0 for 2 years WITHOUT a bellows.

Obviously, nothing that serious if it has been 2 years. . .

The exhaust will not make it into the outdrive and through the prop. It will exit at the transom where the bellows would normally attach. some folks may feel that you run a greater risk of water getting back into the engine . . . who knows.
 

ewenm

Petty Officer 2nd Class
Joined
Mar 30, 2005
Messages
187
Re: Mercruiser 3.0

i run my twin 4.3 efi,s like that in a 32 footer, its a bit nosier when the clears are up, but it gives marginally better performance.

and a couple of hundred rpm more at WOT
 
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