Changing impeller on ZR6 engine with serpentine belt.

[jaybird]

My new boat has ZR-409, which has the same impeller mounting as the ZR-6. On all my past boat with the 5.6 V-belt driven pump it was easier to remove the pump completely to change the impeller. Is this still the case with the ZR-6 pump driven by the serpentine belt? Boat is a 230 V-drive so its a bit akward to get to, unlike a direct drive.

[AirTool]

I hadn't done it in a v-drive, and I'm sure it is tight. The front comes off easily. Find the pic I have posted that shows how the cover bolts are accessed through the pulley. I can't easily find it on the new site.

[NautiqueJeff]

You mean this picture?

[AirTool]

You mean this picture?

That's the one.

My PN navigation skills have regressed for some reason. (wink)

[jaybird]

I know about the three bolts to remove the impeller, but is it easier to take the entire pump off with the two mounting bolts and replace the impeller on a bench? Its tought on a v-drive to see whats your doing.

[TW]

Although I've never removed the entire pump (PCM block mounted pump) to R&R an impeller I definitely agree changing an impeller on a v is more of a pain than dd. This week I removed the pumps off of two 6.0 engines (customers are putting them in cars so didn't need the raw water stuff) and once the paint seal breaks the two bolts remove quite easily. So, the 1st time you remove the pump it might be a pain but the 2nd time not so much. Might be worth a try and decide for yourself if it is worth it.

However, to get to the 2 mounting bolts I find it easier to remove the front housing w/impeller. Since you've already got it out to get to the bolts I suspect it is easier to just go ahead and change it without removing the pump. Let us know what you decide works best.

[jaybird]

I will let you know.....

[IDSkier]

It's much easier to remove just the impeller than the entire pump. You can access the 3 bolts for the front housing through the holes in the drive pulley. These bolts ( I believe they are 5/16") are retained to the housing by o-rings, so you don't have to worry about dropping them into the bilge. Even an impeller switch on a PCM v-drive shouldn't take more than a few minutes.

[AirTool]

It's much easier to remove just the impeller than the entire pump. You can access the 3 bolts for the front housing through the holes in the drive pulley. These bolts ( I believe they are 5/16") are retained to the housing by o-rings, so you don't have to worry about dropping them into the bilge. Even an impeller switch on a PCM v-drive shouldn't take more than a few minutes.

Socket size should be 10 mm.

Jaybird - I just don't see how it would be easier to remove the pump. It might be easier to take the pulley off first if you have trouble seeing that bottom cover bolt w/ the pulley on.

[jaybird]

Thx AirTool,

I have changed the impeller on the old style belt driven countless times and it was just always best just to remove the pump, espically on the 226 with a PCM Excal 330, where only a contortionist can to get to the pump. Just got the 230 with the ZR-409 and getting ready for spring.

Thanks for the advice

[teamseal]

Not a bg deal.
Tools needed:
1/4" drive ratchet
3" extension
10mm socket
Take serp belt off, loosen three bolt thru water pump belt pully Note: their are o-rings on the inside of bolt housing so do not completly remove bolts from outer pump.
pull entire assy away from pump housing. Note: their are indicators on the top that say TOP!
Remove old impeller from housing, install new impeller on shaft of pump re-install into housing in correct allignment , re attach bolts thru pully assy, tighten bolts to about 15ft pounds (hand tight)
Re-install serp belt.
I have done this procedurs on V-drives in less than 5 min without rempoving entire pump....

[jaybird]

Thanks,

Perfect, alwasy nice to be prepared...

[EchoLodge]

Looking to change the impeller on friends's 2008 236. Is it possible to just remove the belt from the pump so as not to have to figure out the maze of turns to put the entire belt back on?

[rivergirlz]

Looking to change the impeller on friends's 2008 236. Is it possible to just remove the belt from the pump so as not to have to figure out the maze of turns to put the entire belt back on?

2007

[AirTool]

Looking to change the impeller on friends's 2008 236. Is it possible to just remove the belt from the pump so as not to have to figure out the maze of turns to put the entire belt back on?

yes