replace an impeller on a 454 Merc/Bravo One

[meier33]

My boat was rapidly overheating on Saturday night and had to get towed in. I purchased a whole new kit and thermosat to be safe. I was getting some advice from friends on where the impeller is located which is on the front of the engine but after trying to find it yesterday I had no luck. If someone could point me in the right direction with a picture I would greatly appreciate it. I am going out of town this week for work and only have 1-2 more boating weekends in Mi. Also I was told to flush the hoses out before I put the new impeller on, if you could help out here it would be great also.<br /><br />Thanks the help!

 

[Walt T]

Re: replace an impeller on a 454 Merc/Bravo One

The sea water pump is a belt driven unit.

 

[jsharrow]

Re: replace an impeller on a 454 Merc/Bravo One

We have a Yamaha Stern drive and are going through the same problem. We cannot locate the impeller. We took the whole thing apart. If anyone knows where the impeller is on a Yamaha Stern Drive, please let us know!<br /><br />It a Yamaha V6 4.3 ltr

 

[KiLer]

Re: replace an impeller on a 454 Merc/Bravo One

Stern Drive......most likely you need to change the water pump in the lower unit. If you don't have one already....buy a manual...preferablly a Clymer. Detail instructions are all in there. Not that tough of a job. Might want to check all the paths that water flow. especially if you find the impeller not whole.

 

[DougPatterson]

Re: replace an impeller on a 454 Merc/Bravo One

Youre impeller is in the sea water pump,belt driven,there is not an impeller in the Bravo drive,get a chiltons,follow sructions,should be ok.

 

[rodbolt]

Re: replace an impeller on a 454 Merc/Bravo One

hello<br /> should be low on the stbd side of the engine. it will have 2 1 inch or 1 1/4 hoses going ito the aft end. all bravo units had engine mounted seawater pumps. replace the housing and all. most of the housings were plastic and let go in a few years.<br /> good luck