No exhaust coming thru prop in bravo 2

T

twixter

Recruit
Joined
Jun 20, 2012
Messages
4
Third trip of the year big loss of power couldnt get boat to rev more than 3000 rpm and do more than 20 miles an hour.. on further inspection noticed no exhaust coming thru prop (bravo2). could flapper let loose? block the exhaust cause the power loss. Revs up while not in gear. does exhaust help spin prop?
 
Josh P

Josh P

Petty Officer 1st Class
Joined
Aug 26, 2009
Messages
328
Re: No exhaust coming thru prop in bravo 2

twixter said:
Third trip of the year big loss of power couldnt get boat to rev more than 3000 rpm and do more than 20 miles an hour.. on further inspection noticed no exhaust coming thru prop (bravo2). could flapper let loose? block the exhaust cause the power loss. Revs up while not in gear. does exhaust help spin prop?
Click to expand...
It will rev up in neutral because there is no load, no exhaust doesnt help spin prop.
But exhaust blockage is a big power reduction.... no air out, no air in, that simple
 
T

TilliamWe

Banned
Joined
Dec 21, 2004
Messages
6,579
Re: No exhaust coming thru prop in bravo 2

twixter said:
... could flapper let loose? block the exhaust cause the power loss. Revs up while not in gear. does exhaust help spin prop?
Click to expand...

1. Yes.
2. That's what a blocked exhaust would do.
3. Irrelavent
4. No.
 
M

Maxum88

Seaman
Joined
Jul 20, 2011
Messages
58
Re: No exhaust coming thru prop in bravo 2

Hey, I'm no boat mechanic but do the basic myself. I have a Mercruiser Alpha one and noticed little to no exhaust coming from my prop. Separated the upper and lower unit, replaced the impeller and the seals in the water pump, as well as cleaned whatever gunk and residue I could see. After that, I noticed a lot more exhaust coming from the prop. Not sure what you've tried yet, but just my 2 cents.
 
You must log in or register to reply here.
Top