2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

[hall832]

I am stumped. Pulled raw water pump today after overheat. The impeller was dust. I checked everything I could. The raw water pump is not getting any water. There is blockage between the pick up in the lower and the hose to the raw water pump. Does any one have any idea what the heck.

 

[Fun Times]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Hi there, if there was to be no blockage, then sometimes the bravo intake water hose may need to be primed to get the pump to start pumping.

If there really is a blockage then the bravo intake water passage may have become clogged up with corrosion like this, HELP PAGE, BRAVOITIS REPAIR INSTRUCTIONS FOR MERCRUISER REPAIRS, INSTRUCTIONS OR HELP TH REPAIR WATER PUMPS, HELP TO FIX LOWER SHIFT CABLE, REPAIR INSTRUCTIONS TO REPAIR TRANSOM REPAIR KITS, HELP WITH GIMBAL BEARING CHANGING,OUTDRIVE REPAIR HELP , LO

Does the boat sit in saltwater?

 

[tazrig]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

When was the last time the impeller was replaced?

 

[Bondo]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

I am stumped. Pulled raw water pump today after overheat. The impeller was dust. I checked everything I could. The raw water pump is not getting any water. There is blockage between the pick up in the lower and the hose to the raw water pump. Does any one have any idea what the heck.

Ayuh,.... Did ya try Back-flushin' it with a garden hose, while apart,..??

 

[Scott Danforth]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

if memory serves me, there should be an oil cooler on the suction side of the B3 raw water pump. the cooler may be clogged. as Bondo mentioned. back flush it.

 

[tpenfield]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

The oil cooler is generally on the pressure side of the sea water pump . . . I would think the the whole business needs a back flushing considering the impeller disintegrated. Things do get caught in the intake hose that leads from the outdrive pickups to the water pump.

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Impeller was new. I did try to back flush. Pulled the intake hose off the water pump and tried. No luck. Nothing coming out of the drive. Boat is always on a lift. I thought about the oil cooler but that is on the pressure side.

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Can I try a low mix of muratic acid?

 

[Bondo]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Impeller was new. I did try to back flush. Pulled the intake hose off the water pump and tried. No luck. Nothing coming out of the drive. Boat is always on a lift. I thought about the oil cooler but that is on the pressure side.

Can I try a low mix of muratic acid?

Ayuh,.... Don't start with acid, use hose pressure, or start takin' things apart til ya find the Problem,....

 

[alldodge]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Time to pull the drive off

 

[Scott Danforth]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Can I try a low mix of muratic acid?

I wouldnt. I would keep pulling off hoses and connections working backward from the raw water pump until you find the problem. then correct the problem.

 

[agallant80]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Since the impeller is toast could it have worn the pump housing out? What happens if the boat is in the water and you pull the two drain plugs on the side of the pump? Will water come out (you may have to crank it) If so I would investigate the pump.

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

I pulled the hose from the pump to the transom tried water pressure and air pressure nothing.
Pretty sure fun times is right on. Gonna pull outdrive and check it on Saturday. Let you guys know what is what. Also pulled both plugs and nothing.

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Great link thank you Fun Times

 

[agallant80]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

You ever think of going to through hull pickup for the bravo?

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

You ever think of going to through hull pickup for the bravo?

Yes I did consider going with a thru hull. The whole time I was upside down and jammed in the incredibly small space. I can only see one drawback. I hate to put any holes in a hull.

 

[lg260ss]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Was the "new" impeller an OEM part? Sometimes aftermarket impellers aren't the correct size which causes a low or no pressure situation.

 

[tazrig]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Yes I did consider going with a thru hull. The whole time I was upside down and jammed in the incredibly small space. I can only see one drawback. I hate to put any holes in a hull.

I went through the same fear about poking holes through the hull. I eventually had one done for a high speed depth finder. If you have it done by someone who really knows what they are doing and does it all the time tis really nothing and it doesn't leak at all. There is also an option to put a pickup through your transom (possibly less traumatic to look at) as seen here:

 

[hall832]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

I went through the same fear about poking holes through the hull. I eventually had one done for a high speed depth finder. If you have it done by someone who really knows what they are doing and does it all the time tis really nothing and it doesn't leak at all. There is also an option to put a pickup through your transom (possibly less traumatic to look at) as seen here:


View attachment 223030

Where can I get this kit?.and has anyone done the bravo 3 to the transom conversion

 

[alldodge]

Re: 2006 6.2 Mercruiser. Bravo three. ate impeller. no water to the raw water pump.

Where can I get this kit?.and has anyone done the bravo 3 to the transom conversion

Put "Mercruiser 88845a1" in google, it comes back with some sites

Mercury, Mercruiser, Force, etc. - WATER PICK-UP KIT - ACCESSORIESMERCRUISERVOLUME II