Their should be a tag pop riveted to the block right above the starter with the serial number you will need a light too see it. By the way if you saw rubber parts then the impeller is bad. And if it's a bravo 1 drive then make sure you are covering the low water pick up holes also, And you should look in to buying a set of new muffs from merc that has a long rod that goes thur the holes on the lower unit and will push and lock on up against the drive so it will not slip off. The fastest way to know if you think you impeller is going out is to carfully put your hand on the out side of the impeller housing to see if it is hot or cold while running, If it is hot then it is bad. And also you do need to run the engine out longer then 2 second But no longer then 45 seconds to wait to see if water comes out. Good luck with it.

What year is it and what drive?

When you figure out the right impeller, and you've got the pump out, do be sure to remove all the debris. Like you mentioned, you saw chunks of rubber. Well, those chucks of rubber tend to get caught up in the hoses and block the flow of water. You might get lucky, but you might not. I had it happen once where I put in a new impeller and the next time in the water, it slowly over heated. Turns out there was chucks of rubber blocking the flow. Removed the hoses, shook out all the rubber, put it back together and never had another problem.

Not sure what year boat you have - but it's always easier to remove the pump assy to change the impeller/housing. If your sea water pump has the lift fuel pump on it - this would also be a good time to change/check the gear oil in it as well.....

Great! will do, thanks for the tip on the "pop riveted" serial number, will make things A LOT easier if I have that! I am running a 95 454EFI with a Bravo 1 drive, which holes are the low water pickups?, I just put the muffs over the "gills" on the side of the outdrive, are there other areas that need a water supply? this would be much easier if I had room to install a sea strainer!

I have flushed water "backwards" through the suction side of the hose, but, how hard is it to actually remove both the sea water hoses? [at the outdrive and wherever the pressure side connects] I like the idea of checking to see if there is any small rubber pieces stuck in there, I really dont want to have to tear all this stuff out again in a week or 2 to get the rubber pieces out.

THANKS!!!

My boat is a 95, I am about 2 hours away from it now, but, from what I can see/remember it takes the impeller that fits inside a "1 piece rear housing", not the newer style, or the very old style with multiple "plates" for a rear housing, just need to verify and get a part number and may have a crack at doing it myself, THANKS!

You can remove the suction hose from the pump, and flush water from the drive, through your muffs to clean out that hose. Or you can easily remove that hose at the gimball ring. Look for it at the lower side of the gimball ring. A little tought to find, but sholdn't be too tough to remove. If I remember it comes out the port side, and the pump is on the starboard side. The other hose, from the sea pump to the water pump should be removed and shook out. Also, remove any smaller hoses that are easy to get to ... from the pump to the water neck... from the water neck to the exhaust... anything else i'm not thinking of. The smaller hoses will capture the rubber easily. They're simple hose clamps, and only take a minute to remove and clean out.

The 1 piece body and 2 piece body use the same impeller.Impeller is #89740.One piece body only has 1 wear plate #94576.One piece body uses a o-ring seal between the body and wear plate #25-33465. You can get all these at ishopboating.com.

THANK YOU!!!!!!!!

I have been rippin' whats left of my hair out trying to locate the part numbers from the Baja/Fountain site, the Mercury site, numerous marina's, man, you would think it would be pretty easy to find this stuff???

I hate to ask, but, is there a part number for a "kit"?, or do I have to order everything individually?, THANKS AGAIN!

Michael

I actually found an impeller "kit", the part number [Mercury] is 47-59362T-7

Any idea if this will work?, I THINK its the right one, but, dont want to get it all apart and find out its not correct, Thanks!