Water pump is this normal

[papou]

is it normal for the water impeller to keep it`s shape after removed from pump this is my second one this year i have different temp reading at different rpm`s on idle the temp would go past 180 my thermostat is a 160
my first impeller lasted 30 hours all fins were there it looked a little worse would not pump water no more the one in the pic has 40 hours and it would no longer pump on idle.

strainer,trans cooler ,hoses are all clear and clean.

Thanks

[lewisb13]

Perfectly normal. My boat runs at 175ish at all times, unless Im on the throttle and realllllllly circulating a lot of water. Not sure why yours isnt pumping, did a new impeller fix the problem? I dont feel like you are having impeller issues. Maybe the thermostat is stuck?

[papou]

Perfectly normal. My boat runs at 175ish at all times, unless Im on the throttle and realllllllly circulating a lot of water. Not sure why yours isnt pumping, did a new impeller fix the problem? I dont feel like you are having impeller issues. Maybe the thermostat is stuck?

at first i changed the thermostat it did`t fix the problem it still overheated i pulled out the impeller and i was worse then the pic put a new one problem solved 40 hours later this one won`t pump on idle.

[deafgoose]

Damn. I maintain 160 degrees all the time and I just finished my 3rd season on the original impeller.

I guess it depends on the water quality. Our river is mostly rocks so there is no sand that would damage the impeller.

[DOCDRS]

I noticed it a volvo penta impeller........try a johnson 812b impeller...maybe they are a higher quality?

[papou]

I noticed it a volvo penta impeller........try a johnson 812b impeller...maybe they are a higher quality?

my first one was a johnson 812 i tried the volvo thinking it might be a better quality

[DOCDRS]

check all clamps, re tape your strainer fittings, empty the strainer and see how quick it fills up when you start it up. Maybe you are sucking air but once under way the scoop forces water into the engine

[papou]

check all clamps, re tape your strainer fittings, empty the strainer and see how quick it fills up when you start it up. Maybe you are sucking air but once under way the scoop forces water into the engine

That`s probably my next step i`ll have to wait till spring


thanks

[papou]

Well i could`t wait for spring so i put the boat back in the water to solve this problem i installed my old J 812 checked all my clamps ,strainer all is good
started engine on idle the strainer filled in 3 seconds so i went for a ride and after 10 minutes on idle in gear it started to over heat i loosen the hose at the trans cooler an the was plenty of water being pumped at this point it`s in limp mode i decided to change the thermostat again this time a 140 went in just a try my temp gauge still went to 180 and within 10 it was overheating at this point a gave up took it out and re winterized it.

This spring i`ll take a trip to the dealer.

if anyone has any ideas great i`ll try any thing at this point

[squeeg333]

It sure sounds to me like there is an obstruction somewhere in the cooling system. I guess I don't know where it could be, but it's got to be somewhere. You've got a strainer, so it seems weird that you'd get anything large enough in the engine to make it overheat.
I'm baffled, though, I'm not the most knowledgeable about these bad boys as I wish I were!