raw water impeller on port engine went out

T

tikiman

New Member
Aug 1, 2009
90
Okoboji IA
Boat Info
2000 340 sundancer
Engines
7.4L V-Drives
Okay I had my first impeller go on my port engine. I heard it and I started to smell an odor went to look at exit port and saw very little water and steam coming out. engine temp creeped just a bit above 170 degrees maybe to 180. I shut down the engine and went back to my slip on starboard engine only. My question is other than the impeller could any other damage happen to the motor?

Thanks,
Dave
 
Not a hard fix. Just have to have monkey arms to reach the darn thing. I would change both motors water pumps. The main thing is to make sure you get all the pieces of the old one out. I back flush the hoses and reconstruct the old one on the dock to make sure I have all the pieces. If it only went to 180 for a short time I would think no other damage. Just make sure you get all the pieces out...do not ask me how I know this? LOL
 
Why would you think a 180 degrees would hurt your motor? If you don't really know --- At that temperature you did not hurt anything in your motor. Now you know why you should do preventive maintance. Much easier to be proactive than reactive.
 
180 is OK (I'm engine engineer)
 
It wasn't the temp that concerned me it was if there was a chance the impeller could have shred to anywhere else in the motor. Sorry if I didn't make myself clear. I did have a work order in for this winter to replace all impellers I guess I was off by a month.
 
Not having v-drives I do have a question about lubricating the shaft seals on the engine not running. From what I've read on posts here unless you have a system that crosses over to both shafts you can ruin your seals running on one engine. Is this a concern on your boat?
 
tikiman said:
It wasn't the temp that concerned me it was if there was a chance the impeller could have shred to anywhere else in the motor. Sorry if I didn't make myself clear. I did have a work order in for this winter to replace all impellers I guess I was off by a month.
Click to expand...

On the 6.2's on my dad's boat I have found pieces in the thermastat housing and the hose. His is a High Performance boat and it seems to eat waterpumps. We change every year and we still have one fail every now and then.
 
spfortjohn said:
On the 6.2's on my dad's boat I have found pieces in the thermastat housing and the hose. His is a High Performance boat and it seems to eat waterpumps. We change every year and we still have one fail every now and then.
Click to expand...

My buddies Fountain does the same thing every year.
As far as your 340 goes I just echo the fact double check to make sure you got all the pieces. When I install I use some dish soap just to lube it up some and install. If you caught it when it went out like you said then just make sure to collect all the pieces and you will be fine.
 
You would think someone would come up with a better waterpump then the one that is standard on the mercrusers, Mine is a 2009 and the mech said it is a better design then the older ones and should last 3 years. I am changing in in Nov just to be sure.
 
They are not hard to replace... The pieces the impeller will most likely be at your trans cooler inlet... Make sure you check it and use a hose to wash through your trans cooler and collect the pieces in a bucket.

It is best to remove the hose connection from the strainer and trans cooler, as access to hose clamps on the impeller is hard to do. Loosen the belt tightener, and remove the belt. Pump the coolant out our Heat Exchanger, and remove the coolant hose to give you access to the bolts on the bracket the holds the pump. Remove the entire pump with hoses and replace the impeller off the boat. Use soapy water to get the impeller in. Then put the pump back in, tighten the bolts and the clamps and fill the coolant...
 
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