mattias
Member
- Jan 27, 2019
- 105
- Boat Info
- 240 SD
Tow Vehicle = 2014 Diesel Grand Cherokee
- Engines
- 350 Mag
Bravo III drive
I have a mercruiser 350 mag in my 2005 240SD - can I change the impeller when boat is in the water?
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If you are talking about the raw water impeller in the lower drive, no, if you have a raw water pump in the ER usually located lower left as you look at the engine from bow to stern yes.I have a mercruiser 350 mag in my 2005 240SD - can I change the impeller when boat is in the water?
LMFAOCentral Ohio and you’re still in the water?
Are you sure it takes a different impeller? One of my pumps has plates, the other does not and I used the same impeller in both with no issues.View attachment 139988 If the housing is fine (no cracks), bit you see scoring inside, Mercury may make wear plates that go inside. It shrinks the inside pump diameter a bit. Thus, it's a different size impeller.
Thus, in theory. The housing can last much longer. You would just replace 2 plates and the impeller every year or 2. Call Mercury with your engine model number to see if they have that kit.
My 8.1 pumps were scored bad. Any sand kicked up will do it. I made the switch to the plates and never went back.
One plate drops in, the other snaps on. Easy. See attached photo of one of mine
Thanks. I didn’t know there was an inner plate and don’t recall if my pumps have them or not.Here is the service / install manual for the shorter impeller. Note: your part number may be different on your model pump.
That all changed around 2003 when they went to that problematic bronze pump, I liked the plastic pump.Any bravo 3 raw water pump I’ve ever seen had a plastic housing. An impeller and housing replacement kit is just over $100.