Whaddya think?

[frayed_knot]

I think the impeller is...um....bad.
http://i29.photobucket.com/albums/c274/phatpony/impeller.jpg

How do I clean all the gasket crap off?
http://i29.photobucket.com/albums/c274/phatpony/lowerpumphousing.jpg

What about that little seal thingy in the water tube housing?
http://i29.photobucket.com/albums/c274/phatpony/upperpumphousing.jpg

I am days away from ordering up my new upper gear box. In preparation for it, I decided to go ahead and break the cases apart. Since I had it apart, I went ahead and took the pump apart. I was going to go ahead and replace the impeller anywho, but dang, that thing looks bad. Now I'm wondering if I should just go ahead and replace the whole pump. How does the lower pump housing come out? I don't see any screws, and it don't move.

[macojoe]

I would try some acetone and a scotch brite pad. To get i clean, They sell the hole pump kit that will come with a new cover seal and all.

[frayed_knot]

I was trying to save a few bucks, but then again, it's cheap in comparison. I don't mind getting a whole new pump, but how does that lower housing come off?

[macojoe]

If you are talking about the white plastic part, it must pull up, but by the looks of the impeller I am guessing it got hot down there and it has seated it self real good!

See if the new pump comes with it before breaking it trying to get it out.

I am not a Merc guy, so maybe someone that no's them better will chine in.

[reelapeelin]

Hey Frayed...saw a boat on Lake Murray yesterday named "Fraid Knot"... :o ... did a double-take!!... ;) ...



Good luck on yer water-pump...looks like ya caught 'er in time ;) ...

[frayed_knot]

Hey Frayed...saw a boat on Lake Murray yesterday named "Fraid Knot"... :o ... did a double-take!!... ;) ...



Good luck on yer water-pump...looks like ya caught 'er in time ;) ...
Cool name, huh?

Looks like the upper gear box grenading has saved me an engine. Sheeze, I better triple check everything before splash down this spring.

[cfelton]

hey frayed, I had a little trouble with my water pump too. I gotta 170 I/O with a alpha one and i replaced the whole pump but still couldnt get any water through it, found all the broken pump blades hung down in the intake behind the intake screens. I took the phillip head screw out,opened it up and found a handful of rubber blocking the hole. I cleaned it out, works good now.

[Skools Out]

FK i think i have a NOS seal thingy, what motor is this off of?

[spareparts]

judging from the pictures, i would replace the upper and possibly the lower water pump housing, if the plastic looks like it has gotten hot, it could be warped, I've put new impellers in old housings only to have them heat, the lower doesn't look too bad, clean whats left of the gasket off of the surface, and inspect it for any signs of warpage. Look to see if there are any signs of lube leaking past the drive shaft seals( they come with the new lower housing)If the metal liner in the upper is grooved or not lined up in the housiing( the tab should be straight fwd) repalce the housing. Definately remove the water pick screens and clean out any left over impeller bits

[frayed_knot]

FK i think i have a NOS seal thingy, what motor is this off of?
It's a '78 898 (305 chebby). I think I'm just gonna go ahead and replace the whole dad-burned thing. I know I'll feel better about it. Thanks a ton boys.

[spareparts]

if you have any questions on replcing it, give me a shout

[randlemanboater]

Wow, I guess Merc uses the same gearcase on I/O and OB, that looks exactly like the one on my 150 OB.

[Stillrunning]

I always replace my entire water pump it runs around $35.00 and its worth the peice of mind. It does not take much for those things to cause a problem.

[reelapeelin]

I always replace my entire water pump it runs around $35.00 and its worth the peice of mind. It does not take much for those things to cause a problem.



Advisio Excellamundo!!... ;D ...

[frayed_knot]

I always replace my entire water pump it runs around $35.00 and its worth the peice of mind. It does not take much for those things to cause a problem.
Care to let me know where you are getting an entire water pump for $35.00? I can't find them that cheap.

[macojoe]

you might get the impeller kit for $35, But a whole kit is going to be $100+

[cfelton]

I bought the whole kit from the Mercury dealer in Elizabeth city N.C. for 46.00. Got the top,water tube,impeller,all gaskets ,O rings,bottom and all in one box,factory replacement parts.

[THEFERMANATOR]

http://cgi.ebay.com/ebaymotors/Marine-Water-Pump-Kit-Mercruiser-with-Preload-Pin_W0QQcmdZViewItemQQcategoryZ50442QQihZ011QQitem Z320090226273QQrdZ1

And yep, MERCURY outboards V4+ used the same impeller as the MERCRUISER outdrives used up till 90(ALPHA 1, GEN 2's used a different larger impeller).

[macojoe]

Wow, Good deal!! Now get her fixed! ;)

[frayed_knot]

That is a good price, too bad it's for the wrong one. I'll look closer at his store when I get some time.

[reelapeelin]

Even if it's $100 do it anyway ;) ... B4 ya go :P ...

[cfelton]

I get some parts from Shore Flyth in E.C. Sierra seems to carry a good line of aftermarket parts.