when rebuilding the water pump what should be replaced

[garym31]

Im seeing whole kits and also seeing just imprellers for sale....what should be replaced

 

[freddyray21]

Re: when rebuilding the water pump what should be replaced

won't know until you get it apart. I usally get away with just changing the impeller, but it the housing it worn then it will need to be replaced as well. Some "kits" come with impeller, new screws for the pump and a grommet so beware. Unless it says it comes with the housing assume it does not.

 

[Joe Reeves]

Re: when rebuilding the water pump what should be replaced

I have always replaced the entire water pump assembly in order to avoid duplicate work..... ie...... install impellelr, engine still runs too hot, drop lower unit, find scored water pump plate, install new plate, reassemble, still too hot, drop lower unit, find pits in housing, etc etc.

Better to bite the bullet, install the complete pump and be done with it.

 

[freddyray21]

Re: when rebuilding the water pump what should be replaced

I agree with Joe when it's a motor you don't know. If it's a motor I have had awhile and am just replacing the pump for maintenance then no. If it's new to you then do as Joe says.

 

[garym31]

Re: when rebuilding the water pump what should be replaced

so you guys replace the entire pump or just purchase a rebuild kit

 

[freddyray21]

Re: when rebuilding the water pump what should be replaced

if it's an older motor new to you replace the entire pump so you know what you have. If you are just replacing the impeller for maintenance then just replace the impeller.

 

[CatTwentyTwo]

Re: when rebuilding the water pump what should be replaced

I have an 84 9.9 and a 94 175. The BRP rebuild kits that I have purchased for these motors were the entire pump.

 

[kenmyfam]

Re: when rebuilding the water pump what should be replaced

I have always replaced the entire water pump assembly in order to avoid duplicate work..... ie...... install impellelr, engine still runs too hot, drop lower unit, find scored water pump plate, install new plate, reassemble, still too hot, drop lower unit, find pits in housing, etc etc.

Better to bite the bullet, install the complete pump and be done with it.

I am 100% with this response. Replace the whole thing then you know what you have.

 

[1946Zephyr]

Re: when rebuilding the water pump what should be replaced

Yea, I have to agree....tearing into something....again just cuts into my drinking time too much. Not a good thing. May as well do it complete while you have it apart, especially if it's a motor you plan on keeping for a while and using a lot.

Leon

 

[jay_merrill]

Re: when rebuilding the water pump what should be replaced

If you buy your parts locally, call the dealer to see what they have in stock for your motor. They will probably have both an individual impeller and a waterpump kit.

You can then drop the gearbox and disassemble the water pump. Inspect the parts thoroughly. From this point, there are two schools of thought - one says to replace only what needs to be replaced, and one suggests that the effort in having to do the work over again, isn't worth the cost savings in not buying/installing the full kit.

If you buy the full kit from OMC/BRP, you should get a housing, the impeller, a new driveshaft key, a new base plate and two water tube grommets. I can't remember if the o-ring that goes on the top of the driveshaft comes with it, but I think not. I would buy one simply because it is cheap insurance against a major annoyance later on. If I am going to do a total rebuild of the water pump, I also have a tendancy to pull the water tube and replace the upper grommet, as well.