Impeller [Archive]

east tx skier

02-24-2005, 10:30 AM

Your replacement is a Johnson 812 impeller. Make sure it comes with the white gasket. Remove the plate on the front of the impeller pump, soap and water everything inside up really good. And pull, pull, pull. Make sure, before you pull, you mark where the notch on the impeller is (there's a little notch on the brass hub). The new one needs to go in the same way. Replace the gasket on the access plate and reattach the plate. Nothing to it. Did mine on Monday.

jsonova99

02-24-2005, 10:31 AM

thanks guys, I'll pick one up when I order my tune up kit.

BrianM

02-24-2005, 10:33 AM

Take the the screws of of the impeller cover and soap the thing up real good. I have had very good luck with pulling the coil wire and cranking the engine over a few times. You should then be able to easily remove it with the two screw diver method mentioned above. About a 5 minute job. And ditto EastTexas make sure you put a new gasket on the cover. SkiDIM send the new gasket with the impeller.

sfitzgerald351

02-24-2005, 10:35 AM

Wow, do you guys find that it's really that hard to get an impeller out? I find that I can just grab mine and pull and it will slowly slide right out. It does help if it's wet, but wet or dry it's not that hard to do.... Maybe something is wrong? Or are older boats simply easier?

BrianM

02-24-2005, 10:43 AM

Mine is pretty easy but I cant get a good enough grip on it with just my fingers to pull it out. It seems to get kind of stuck to the splines. But a little soapy water and some leverage with the screwdrivers and it pops right out.

G-man

02-24-2005, 10:56 AM

If you put silicone grease on the shaft of the pump and inside the impeller the next time it will come off easier. Silicone grease will not hurt the rubber vanes like petrolium based lubicants

Leroy

02-24-2005, 10:57 AM

Mine was really stuck and I pulled rubber off using the two plier method before it broke free. Of course the Maristar isn't as easy to get to either.

sfitzgerald351

02-24-2005, 11:08 AM

If you put silicone grease on the shaft of the pump and inside the impeller the next time it will come off easier. Silicone grease will not hurt the rubber vanes like petrolium based lubicants

Maybe that's my trick. I've always sprayed it with the silicon spray before installation... Didn't really think that other might not have been doing the same. Sure makes getting the new one in easier and is supposed to be better for it, especially on the first dry start up.

G-man

02-24-2005, 11:24 AM

Scott your using the spray which works, I'm using the grease, its thick and comes in a jar. The grease will last longer on the shaft and inside the impeller. Most dive shops sell it in a grease form. There are a lot of sprays that have silicone in them but most aren't 100% or food grade silicone.

sfitzgerald351

02-24-2005, 11:35 AM

Yeah, I recall it being tricky to find the 100% silicon spray. Seemed like everything else was a mix of stuff that had the potential to eat at the rubber, even if it did have silicon in it. I love the spray because I use it to lube the weather stripping on the rear window on my Bronco tailgate to help it go up and down. Since the tailgare is old and getting rusty, it won't stay aligned and the lube really helps the window move up and down in cold weather. Good stuff.

east tx skier

02-24-2005, 11:51 AM

Forgot to mention (and this is going to sound funny), but my impeller came with a little tube of lube this time around. 8p

MarkP

02-24-2005, 12:17 PM

Doug

I don’t remember for sure but I don’t remember any type of lube when I replaced my impeller, (end of last season) . Bought it from DIM. It wasn’t hard to put in but I would guess the lube would help.

east tx skier

02-24-2005, 12:27 PM

Mine may have come from overtons. I bought a bunch of stuff. Since dim didn't have the oil pump I wanted, I went with overtons for the combined shipping aspect of it all.

milkmania

02-24-2005, 01:38 PM

for my swimming pool o-rings, I use a small tube of food grade lube, and that's what I'll use when I replace my impeller.

at the Dairy, we used a product called C.I.P. lube (Circulate In Place) for all of our o-rings and impeller pumps, it's pretty much the same stuff as above.

you'll also seethis kind of lube in Ice Cream machines.

and yes! lube is good----> NSFW http://home.alltel.net/bhammon/monkey.jpg

MarkP

02-24-2005, 01:47 PM

I got nuttin to sat to that:noface:

dmac

02-24-2005, 02:06 PM

Mine was really stuck and I pulled rubber off using the two plier method before it broke free. Of course the Maristar isn't as easy to get to either.The way the engine is compartmentalized not much is easy to get to I would think.

ChrisG

02-24-2005, 02:07 PM

I started a thread like this last year (I had a hell of a time getting mine out). But someone on this site suggested to turn the engine over a few times (after you've lubricated the impleller), and then try pulling it out. Worked like a charm.

east tx skier

02-24-2005, 02:13 PM

Make sure you pull the kill switch before you turn it over. That method also works great during winterization for getting the water out of the pump housing. Wish I'd remembered that the other day when I swapped my impeller.

nashvillematt

02-24-2005, 02:58 PM

I have found that using the paint can openers that they give away at Home Depot is an easy way to do it. They already have the bent ends and are short....with a handle built in.

That is what I use. If it wont come out easy....WD40 helps a lot!

boatwake

02-24-2005, 03:52 PM

Anyone know the correct part no. of the raw water impeller on an 03' with an MCX (MC or OEM)? Skidim lists a few depending on year and engine type. MYMC shows one that fits all MCs. There appears to be a difference in the number of splines, but I wasn't sure if that was the only difference.

rmc1

02-24-2005, 04:36 PM

might want to buy a spare one to carry with you along withthe tools to change it. they can go bad at the worst time and if you are somewhere on vacation and there is not an mc dealer around you could have a bad day/week

east tx skier

02-24-2005, 04:37 PM

I change it out annually, and always save my most recent one as the spare. Good idea on the paint can openers.

lakes Rick

02-24-2005, 04:38 PM

Mine was really stuck and I pulled rubber off using the two plier method before it broke free. Of course the Maristar isn't as easy to get to either.

I hear you Leroy.. When I heard about the "cranking over with coil wire off" I thought all right.. Sure doesn't work in this household.. I have had to take off my entire unit from the crank and pull it on my workbench each time..

Hemey5

02-25-2005, 12:38 PM

I've never really had that much problem pulling them out either. Is there a big difference between the old ones vs the newer ones?

east tx skier

02-25-2005, 01:51 PM

Depends how old. At some point, I believe you had to take the pump housing apart. That's not the case on my 93 as there is an access plate.

jsonova99

03-04-2005, 03:49 PM

I have to ask the question, what happens if the impellar isn't lined up exactly as before? I think mine might be off by one notch, but I was stupid and turned the engine over before I was sure :o Should I try running it and monitor temperature to make sure it doesn't overheat before taking the boat out for a run?

east tx skier

03-04-2005, 05:34 PM

I'm not sure you can put it in wrong. I figured marking where the notch was was just so you could get it back in there. ICBW

jsonova99

03-04-2005, 06:26 PM

I noted where the notch on the impellar was, and I put it in but I was looking at an angle at it, I turned the motor over just to make sure it was alright in there before putting the cover back on. I'm about 95% sure that I got it right, but what I am worried about is that it has an 8 sided polygon fitting inside of it, I may be one side advanced if that makes any sense. Unless I am confused about marking where the notch is, maybe I am thinking of something different.

AirJunky

03-04-2005, 06:37 PM

I don't think there is a wrong way to get it in there.

jsonova99

03-04-2005, 07:08 PM

That's what I figured. Well, its in and I'm hoping to take a run tomorrow to check everything out.

NatesGr8

04-18-2005, 11:24 AM

I've read all the posts for impeller removal and installation. First off, removing my impeller was agonizing. screwdrivers didn't work, pliers didn't work, impeller puller didn't work, finally a slide hammer screwed into the rubber got it off about 1/4 inch, then two pairs of needle nose vice grips got it the rest of the way off. Now installing the new impeller is just as hard. It goes in up to the shaft then stops, i could force it on but i know this is the wrong way. I have a feeling the person before me forced it on and may have messed up the spline, however it feels and looks fine. Any ideas on how to get this damn thing back in properly?

I am giving up for now and washing the car while awaiting your replys.

mitch

04-18-2005, 11:31 AM

Nate, Sorry to hear you're having so much trouble. I just changed mine a few minutes ago. Took a total of 15 minutes start to finish. I've always used the 2 screwdriver method. Not that it's out, lube the heck out of the new one, *and* the impeller housing w/ the Glycirin (sp) (use the whole tube), and force it back in. It should slide right in. I line mine up with fins facing the same way as the old one, but as mentioned I believe it corrects itself anyway. Good luck

NatesGr8

04-18-2005, 07:49 PM

Thanks, i finally got it on, i had to file down the inside just a bit and then lube the hell out of it, then she finally went. Took the boat for a cruise today and no problems :) :)

mitch

04-18-2005, 08:04 PM

excellent!

DAinAZ

04-20-2005, 10:55 PM

Thanks for all the info above. I just tried to remove my old impeller and had no luck. I tried with vice grips and it wouldn't budge, but I also didn't lube it up or turn over the engine. I was going to buy a puller, but hated to spend the $50 to change a $30 part. Seems to blow the margins of doing it yourself.
I am going to try it tomorrow and see if I can get it off. I haven't used my boat since last year, opened up the impeller cover and a couple of the vanes were torn off already. Not a good sign. I need to get the boat in shape so I will be ready this year. Just got a ton of new gear, so I have to get out and use it.

Leroy

04-20-2005, 11:10 PM

With a 190 you have it easy! Try a V Drive!

You can just grab the fins with pliers and pull like crazy. Pull on opposite sides and like below once you get it out make sure you lube good before installing the new one. I ripped pieces of the fins off before mine broke lose last fall.

jimmer2880

04-21-2005, 05:48 AM

Someone on here (a couple years ago) suggested screwing in deck screws into the old impeller after lubing it up & turning the engine over once to break the veins free. Then, grap the screw heads with vice grips & pull. That's how I pull mine.

DAinAZ

04-23-2005, 05:15 PM

I did my impeller this morning. As you can see from the pictures below of the old one, it was about time. I pulled a couple pieces out of the housing.

As I said before, I tried vise grips and everything trying to pull on it, then read this thread and found out about lubing it up and then turning the engine over to rotate a couple times. Then I reached in with a vise grips, and pulled the impeller right out. Probably didn't even need the vise grips! Before it was a failed 45 minute experience. This time, a successful 5 minute experience thanks to TMC Team Talk!!!

Now I am working on my brakes. Thanks to someone responding already on my other thread, I am off to do that job. I already pulled the actuator and the push rod assembly, master cyliner and shock are shot. I'm going to order them once I figure out if my drums are shot or not. If they are, I may go disk. I'll keep you posted.

JEREMY79

04-23-2005, 05:49 PM

I replaced mine the easy way. I had to get a new housing (?) and the impeller came with it.

juju151

05-13-2005, 04:50 PM

Hey guys,

I guess that I need to change mine as well, since I don't know when the last time it was done. My question is this... Can you change this with the boat in the water? Just wondering if taking the cover off while it's in the water will be like taking the plug out of the bottom of the boat??? Thanks...

Crash

05-13-2005, 04:56 PM

Just replaced a stubborn one last night after reading this and other threads. Best advise I read was to be sure when putting the new one in...to LUBE ER UP! ;)

DAinAZ

05-13-2005, 04:57 PM

You should have no problem doing it while the boat is in the water. Without the impeller moving, no water will be pulled into the engine, and therefore your boat while it is in the water. I've taken my cover off to check the impeller while out on the lake because my engine was overheating. I learned the hard way that it should be changed every year whether it looks like you need to or not.

juju151

05-13-2005, 11:00 PM

Thanks for the info...I'll get one ordered. The guy told me that the boat had been serviced every year by a MC dealer and dry stored on an inside rack by the lake, but I don't know if I believe that, because the oil looked pretty nasty. That's the first thing I did was change the oil because of the way it looked. So I guess that I need to also change the Tranny fluid, replace the blower which is a little noisy sometimes when it's running. Replace the impeller, check the shaft alignment...and find out where it's taking on water. It's not taking on much, but it'll rise about 1/2" or so in the bilge sitting in the water overnight...but for all I know the auto bilge pump could be pumping out some overnight as well. I haven't been out IN the boat watching it for very long since I got it...only went out in it for an hour or so and it didn't seem to change much??? But then again, the pump could have come on and I didn't know it. I'm going to be keeping it in the water alot, so I'm thinking about getting another battery and an extra automatic pump, then wiring it up so I can just drop the pump in the bilge for a temporary emergency backup while it's sitting in the water unattended...then I could just set the battery and pump out on the dock when I'm taking it out for a ride. Has anyone else done this type of thing...it just makes me nervous when it's in the water and I'm 60 miles away at work, ya know? I need to get a lift...then life would be wonderful! :)

PE4ME

05-13-2005, 11:10 PM

leak
my project required resealing all screws on the fins, strut etc. loosen from the bilge, silicon and tighten back up, repack nut, drip #/minute to specs and havent had a problem since- and it was BAD until I did the above...
impeller?
can argue either way, first boat it actually came apart and clogged the screens/lines- could see the chunks...
once you replace with a new one, i would think vaseline will save you the time/$ if you dont let it sit and dry rot...others will say every year...cant argue that either.

boyd

04-06-2007, 11:33 AM

Worked for an hour last night trying to get the darn thing out (impellar).
After reading this thread I have some new ideas. But .... here's a question ..... my old impellar is not centered. While looking at the front the fins are smashed against the right hand side and bent at a 90 degree andgle on the the other side. Is it supposed to be exactly centered?

east tx skier

04-06-2007, 11:46 AM

I don't know about centered, but what you're seeing is what I see in mine as well so I suppose it's not.

cst573

04-06-2007, 11:49 AM

That is how mine looked as well. My mechanic said its suppose to be that way.

Leroy

04-06-2007, 11:56 AM

They are not centered, that is the way the vacuum is created and ability to pump water.

limegreen

09-04-2007, 09:25 AM