Can I replace the impleller on my Bravo III (2005) while the boat is in the water? This replacement would be for maintenance, I am currently not having a problem.
If so, where is it located and is it relatively easy to replace?
Looks like a water pump. I'm assuming that I remove the 4 bolts and the impeller is behind the housing of the picture you illustrated.. I'll look this weekend.. Thanks.
Last edited by crownline270; 09-09-2009 at 02:48 PM.
Reason: addition
No offense but if don't know were the pump is or whether it is sea water or circulating maybe you should take it to the shop or find someone with experience to guide you.
Dave
Last edited by BeaverDave; 09-09-2009 at 06:52 PM.
that looks like a water pump to me not the sea water pump!!!!!!!!!!!!!!!! What year is your boat, cause i changed mine this year on my mercruiser 454 with a bravo 2 and it was the original one and my boat is 12 years old if its not broke dont fix it but its not a bad idea to keep a spare just in case
Thanks for all the advice.* First and foremost, No offense taken (good advise though for someone who really isn't sure) I am mechanicly inclined.* I've been in the automotive industry for 29 years and can turn a wrench, lol!
My Boat is a 2005 Crownline 270CR with a 350 MAG / Bravo III.*
Once I'm pointed in the right direction, I'm sure I'll be fine with changing the impeller. I just replace one of my blowers (of course that was only two wires and two mounting screws).
In terms of "if it ain't broke, don't mess with it"!* I'm just the opposite.* I'm all about preventive maintenance.* Yes, I'm anal about maintianing my boat just as I am with my cars.* I have no interest in unsceduled break downs.. Especially on a river trip or day out with my family. So, if I'm a little overkill about maintenance, so be it...LOL!
Anyway, thanks everyone for the great advice. I'm going to check out the link that was posted.* You guys are always great on here..
Last edited by crownline270; 09-09-2009 at 09:08 PM.
Reason: spacing
Agreed. The impeller on for a bravo III should be changed every year (obviously depending on how much the boat is used) but from my experience the Bravo III's seem to eat impellers.... Easier to change a $80 impeller at the beginning of the season rather than headgaskets in the middle!
A list of steps for the change...
1) Get this part MER 46-807151A14 (kit)
2) Release tension on serpentine belt
3) disconnect the two hose from the back of the pump housing...pay attention to the connection order and position.
4) Remove pump assy from block by removing the two screws from the mounting bracket.
5) on the bench...remove the five long screws holding the pump housing to pump and pump bracket...pay attention to their positions
6) Remove impeller, wear plate, replace.
7) To aid in impeller install...soap it up with dishwashing liquid.
8) Reassemble housing...the impeller will self align..so don't worry about it.
9) Reinstall five long bolts and bracket CRITICAL INFO HERE...TIGHTEN EACH BOLT TO A MAXIMUM OF 12 LBS/FT - The housing Cracks easily if it is over tightened
10) Reinstall pump assy to block...tighten bolts to 30 lbs/ft
11) reconnect hoses on back of pump
12) reconnect serpentine belt and tension it.
My impeller failed the first time I fired it up this spring. I am never afraid to take on a mechanical task so I gave it a shot. I have a 2003 350 MAG Bravo III.
Boat was in the water. It took me two hours from arrival to putting the cockpit cover back on with a buddy and neither of us had ever done this before. I had a nice document from a boating friend that walked me through it step by step with pointers and diagrams. I have a copy I could email you if you would like. I got the impeller from Rte 8 Marine and it cost about $40. A few pointers... make sure your bilge pump is operable before you start. Take something to plug the raw water supply line as it will constantly be leaking in water. Not large volume but hence the "make sure your bilge pump works" statement. If you have a small wheel/pulley puller it will make the impeller removal easier.
It was alot easier than I had imagined. The toughest part was getting the pump aligned again on the install... we had a hard time with this to get the bolt back in. Took some patience in cramped quarters.
Good luck and let me know if you want the walk through instructions.
Ben
If you merc guys ever saw a volvo penta crankshaft mounted pump, you would never buy merc again. Less than 10 minutes to change impeller. Mounted right on the front of the crankshaft for easy access.
I agree that every impeller should be changed yearly, as part of your spring maintenance. Cheap insurance.
My impeller failed the first time I fired it up this spring. I am never afraid to take on a mechanical task so I gave it a shot. I have a 2003 350 MAG Bravo III.
Boat was in the water. It took me two hours from arrival to putting the cockpit cover back on with a buddy and neither of us had ever done this before. I had a nice document from a boating friend that walked me through it step by step with pointers and diagrams. I have a copy I could email you if you would like. I got the impeller from Rte 8 Marine and it cost about $40. A few pointers... make sure your bilge pump is operable before you start. Take something to plug the raw water supply line as it will constantly be leaking in water. Not large volume but hence the "make sure your bilge pump works" statement. If you have a small wheel/pulley puller it will make the impeller removal easier.
It was alot easier than I had imagined. The toughest part was getting the pump aligned again on the install... we had a hard time with this to get the bolt back in. Took some patience in cramped quarters.
Good luck and let me know if you want the walk through instructions.
Ben
Shoeless,
Thanks for the insite. I'd be interested in that document! You can email it to crownline270@yahoo.com
Agreed. The impeller on for a bravo III should be changed every year (obviously depending on how much the boat is used) but from my experience the Bravo III's seem to eat impellers.... Easier to change a $80 impeller at the beginning of the season rather than headgaskets in the middle!
A list of steps for the change...
1) Get this part MER 46-807151A14 (kit)
2) Release tension on serpentine belt
3) disconnect the two hose from the back of the pump housing...pay attention to the connection order and position.
4) Remove pump assy from block by removing the two screws from the mounting bracket.
5) on the bench...remove the five long screws holding the pump housing to pump and pump bracket...pay attention to their positions
6) Remove impeller, wear plate, replace.
7) To aid in impeller install...soap it up with dishwashing liquid.
8) Reassemble housing...the impeller will self align..so don't worry about it.
9) Reinstall five long bolts and bracket CRITICAL INFO HERE...TIGHTEN EACH BOLT TO A MAXIMUM OF 12 LBS/FT - The housing Cracks easily if it is over tightened
10) Reinstall pump assy to block...tighten bolts to 30 lbs/ft
11) reconnect hoses on back of pump
12) reconnect serpentine belt and tension it.
Thanks for the step by step info! This is good stuff. Everyone here has been great in giving me some info on changing my impeller.
I'm thinking this task shouldn't be to difficult. Have a great boating weekend.
My impeller failed the first time I fired it up this spring. I am never afraid to take on a mechanical task so I gave it a shot. I have a 2003 350 MAG Bravo III.
Boat was in the water. It took me two hours from arrival to putting the cockpit cover back on with a buddy and neither of us had ever done this before. I had a nice document from a boating friend that walked me through it step by step with pointers and diagrams. I have a copy I could email you if you would like. I got the impeller from Rte 8 Marine and it cost about $40. A few pointers... make sure your bilge pump is operable before you start. Take something to plug the raw water supply line as it will constantly be leaking in water. Not large volume but hence the "make sure your bilge pump works" statement. If you have a small wheel/pulley puller it will make the impeller removal easier.
It was alot easier than I had imagined. The toughest part was getting the pump aligned again on the install... we had a hard time with this to get the bolt back in. Took some patience in cramped quarters.
Good luck and let me know if you want the walk through instructions.
Ben
Impeller Replacement on a Bravo III
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Originally Posted by JM_Excel
