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dsuthy190
04-13-2005, 08:30 PM
My water pump impeller shredded earlier this season and I replaced it w/ no problem. After running the engine two or three times it began to overheat. I thought I just had a stuck thermostat so that was also replaced. When I replaced the thermostat I also backflushed the engine...... or I thought I did it properly. I am thinking that the pieces of the impeller are still stuck inside my engine and I am not entirely sure of how to properly backflush the motor to get them all out so I can have some fun wakeboarding. The boat only heats up very quickly if I start running at a speed anywhere over 25 mph or 3000 rpm. Is this a problem that I am going to have to have someone else take care of or can I do it on my own? The boat is a 96 ProStar190. Any advice would be greatly appreciated!

rem_pss308
04-14-2005, 10:20 AM
I had the same thing happen a few years back. I was lucky my pieces went right through with out clogging anything.
You will need to check the hoses going into the exhaust manifold.You might even have to seperate the riser from the manifold. there is an area there than can get clogged.

If you didnt check all around the thermostat housing, I would check there again.

It would not be clogged by the impeller, but I would also check the input side of the transmission cooler. It could have some trash in it causing these problems.

east tx skier
04-14-2005, 10:36 AM
When my father-in-law shredded an impeller last year, we pulled every hose and checked for pieces all the way back to the transmission cooler. We found them somewhere in between the t-stat housing and the water pump. No high temp problems since then.

dsuthy190
04-25-2005, 04:35 PM
:confused: I pulled off the top of the Manifolds and checked in the places you told me and still found nothing...... I replaced the hoses coming from the thermostat going to the manifolds and washed out the others..... I also checked my tranny cooler and there was still nothing clogged in there. I still cant find any of these pieces....... is it possible they are just lodged and wont start blocking anything until there is enough water pressure to push them up to make a blockage.....?? I know the faster the motor runs the more water it needs so is it possible they are just sitting in the bottom somewhere until the pressure builds enough?? and how do i remove them from there? I am sure that it is not the water pump causing the problem b/c it would overheat at lower rpm's or while it was just idling.... or i could be mistaken about that as well... Please help!!!!!!!

rem_pss308
04-25-2005, 04:47 PM
Have you hooked a hose up to the engine to see how the water flow is?

One other thing that comes to mind is a bad thermostat.I have gotten non-wrking thermostat's before. You can try taking the thermostat out and run the engine, to see if it runs hot.

other than that, it is beyond me.

sfitzgerald351
04-25-2005, 06:25 PM
Taking the t-stat out should make it run cold, not hot, right? Doesn't the t-stat restrict the cooling water from being circulated into the motor? Removing it means you have all cold water going through the block. Or am I confused?

Ric
04-25-2005, 06:31 PM
Taking the t-stat out should make it run cold, not hot, right? Doesn't the t-stat restrict the cooling water from being circulated into the motor? Removing it means you have all cold water going through the block. Or am I confused?
I think you're right
unless the speed across the water = waterflow moving faster across the motor and not allowing it enough time to cool off the surfaces?? That is a stretch though.

sfitzgerald351
04-25-2005, 06:40 PM
Waterflow really wouldn't matter much. The water moving past the engine would still be a colder temp and the heat transfer would still take place. You could carry more heat away I'd think since the water moving in the engine wouldn't get as hot, keeps the temp gradient up, which is what moves heat.

sfitzgerald351
04-25-2005, 06:43 PM
Oh, and I'm thinking now that if you haven't located the pieces taking off your thermostat is probably a bad idea. The t-stat would likely keep the pieces from getting in the internal cooling passages of the engine where you'll really not find them.

I think you just have to pull all the cooling hoses and keep looking. Never done this so not sure how much more help I can be. Let us know what you find!

Ric
04-25-2005, 06:46 PM
dumb question: Did you check the "new" impeller to be sure nothing's gone wrong with it since you started having all this trouble?

wesgardner
04-26-2005, 07:58 AM
Hey suthy,

I think my vote is with the removing the hoses routine...here's a real long shot - something in the intake strainer?...doesn't seem likely...do you have a FlushPro or raw water stainer that could be PARTIALLY restricted?

Wes

MarkP
04-26-2005, 08:23 AM
Iím with rick

Check the new impeller. Maybe the pump is going bad and is just tearing the impeller up????

dsuthy190
05-15-2005, 01:19 PM
I have found my problem...... and I am quite ashamed to say it! Some pieces of the impeller when it shredded went back into the feed pipe of water to the impeller and got lodged in the diaphram inside the housing that holds the impeller! I took off every hose but that one b/c i saw nothing in there when i replaced the impeller but it was b/c they were stuck on the inside where i could not see. So a little extra thinking on my part would have found the problem alot quicker!! But i definitly appreciate everyones help on the subject matter and I am sorry it has taken me so long to reply!!! Happy boating and I will see you on the water! Stay safe! :D :D

BriEOD
05-15-2005, 01:55 PM
Where in Jax do you ski?

dsuthy190
05-17-2005, 11:20 PM
I ski in Pottsburg Creek.... It isnt the biggest and best place to go but i enjoy it!

pflcjl
05-22-2005, 08:03 AM
Same thing happend to my PS190 - Check the bottom screen to your transmission cooler and you will find all those little black pieces of rubber!!

betsy&david Harrison
05-22-2005, 10:58 PM
Iím with rick

Check the new impeller. Maybe the pump is going bad and is just tearing the impeller up????


This past Sat. David noticed oil under the hood. Turned out to be the housing to the impeller..some bering went out. Pump still works, impeller is still untouched after 50 hours. Time to replace it...only after 900 hours...what were we waiting for? B :rolleyes: