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 Post subject: water pump woes
PostPosted: Wed May 17, 2017 5:10 pm 
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where can I get a water pump rebuild kit for my Roketa buggy with a water cooled 250 engine? I can't seem to find my buggy on their website but the 250 engines all look the same. I have coolant coming out of the weephole by the water pump and I assume that means the seals are shot. I didn't see anywhere on their website where you can buy any repair kits for the water pump.


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 Post subject: Re: water pump woes
PostPosted: Wed May 17, 2017 5:21 pm 
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Use one of the dealers listed here:

a-list-of-trusted-dealers-t17576.html

You need CN250 engine parts for your Roketa.

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 Post subject: Re: water pump woes
PostPosted: Wed May 17, 2017 6:00 pm 
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Thanks for the list. I ordered a water pump kit from one of the suppliers on that list. How hard is it going to be doing this repair?


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 Post subject: Re: water pump woes
PostPosted: Wed May 17, 2017 7:28 pm 
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Not too bad of a job. The impeller is reverse thread and once its removed you can pry out the base with a small screw driver carefully enough to where you can put some needle nose pliers on it to pull. The install is where you must take your time to not bind anything.

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 Post subject: Re: water pump woes
PostPosted: Thu May 18, 2017 7:21 am 
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The other thing you may want to check while you have this opened up is the snap ring that holds the sprocket on the oil pump. I have seen those get loose and come off.

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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 12:23 pm 
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Ok, I got the cover off and am having trouble removing the pump. The engine is rolling over as I'm trying to take the impellor off. I am aware of the threads being left handed. Do I hold the impellor with some channellocks while taking the nut off holding the impellor? Does the impellor have to come off before you can get the pump out? Is this nut a 12mm?


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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 1:43 pm 
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You should be able to hold the variator with your other hand to keep the engine from turning over. If too tight, remove the spark plug and feed nylon rope into the cylinder to prevent the piston from completing a cycle.

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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 2:03 pm 
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Is the variator the same thing as the impellor? I tried holding it with a pair of channellocks and managed to break 2 blades off of it so far and haven't gotten the nut loose. I am aware that they are left-hand threads but can't seem to break it loose. Can I get a new impellor or does anyone here have one that they would be willing to part with? This thing was probably never taken apart and that's why it's being such a b**ch.


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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 2:55 pm 
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I found and ordered a water pump kit complete with new impellor [variator][?] from Prattville Powersports. Now all I have to do is get the old one off. Not going well so far.


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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 4:43 pm 
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The variator has a belt around it and that belt goes to the clutch. not any part of the impeller. You would have to remove the transmission cover to see the variator.

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 Post subject: Re: water pump woes
PostPosted: Mon May 22, 2017 7:44 pm 
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To change that water pump you will need to pull the stator cover off. That is the whole side that covers the flywheel. Just pulling that little cover that exposes the impeller will not get the job done.

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 Post subject: Re: water pump woes
PostPosted: Wed May 24, 2017 1:59 pm 
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Okay, this water pump job is really kicking my butt. I'm not a total idiot when it comes to mechanical issues but I've never heard of a variator so had no idea what it was or where it is. Anyway, I did manage to get the impellor off of the pump and got the seal with the spring in it out but the shaft still won't come out. Is there something else holding it in? Is the cover that has to come off on the left or right side of the engine as you look at it from the back of the buggy?


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 Post subject: Re: water pump woes
PostPosted: Wed May 24, 2017 2:04 pm 
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I just went out to the garage and it looks like the black plastic cover on the right side is the one I need to take off. What do I need to do in there besides keep the engine from rolling over. I already have the impellor off the water pump, I just can't seem to pull it out of the engine.


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 Post subject: Re: water pump woes
PostPosted: Wed May 24, 2017 3:47 pm 
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I assume the stator cover is the one on the left side of the engine. I would think I will need a new gasket for this cover when I put it back on.


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 Post subject: Re: water pump woes
PostPosted: Wed May 24, 2017 8:15 pm 
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Papa Rich wrote:
To change that water pump you will need to pull the stator cover off. That is the whole side that covers the flywheel. Just pulling that little cover that exposes the impeller will not get the job done.


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 Post subject: Re: water pump woes
PostPosted: Thu May 25, 2017 2:48 pm 
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I did see that. I just wanted to make sure I was taking the right thing off. Well, I got it off and removed the old shaft (probably wouldn't have had to but I already had a new one), got the new one installed with new bearings and oil seal on it. Just waiting for the new impellor to come so I can finish putting this thing back together. I ruined the old impellor because I thought there was a 12mm nut holding it on. Turns out, its actually part of the impellor. No wonder I couldn't get it to turn. Lesson learned! Thanks to you guys who have given me advice on this job and especially the list of suppliers for finding parts for these things. I think I will get to know the people at BPNW pretty well in the future.


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 Post subject: Re: water pump woes
PostPosted: Sat May 27, 2017 9:42 pm 
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Thats good news. Keep us updated on the completed project.

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 Post subject: Re: water pump woes
PostPosted: Sun May 28, 2017 8:56 am 
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There is one part you need to watch out for is a spring loaded plunger that goes in the end of the crankshaft. That is the coupling to get oil from the oil passage in the cover to the crank for lubricating the rod journal.

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