owner

I own a 1991 cruiser with 5.7 Mercruiser and V drives. This past weekend I was camping on a sand island. Shortly after pulling myself off the island my starboard engine overheated. I assume I sucked some sand into the impeller of the seawater pump. What parts and tools do I need to make the repair myself? My raw water system runs through seacocks in the hull, then through a strainer, through the V drive and then to the engine.

Denny A said:

I own a 1991 cruiser with 5.7 Mercruiser and V drives. This past weekend I was camping on a sand island. Shortly after pulling myself off the island my starboard engine overheated. I assume I sucked some sand into the impeller of the seawater pump. What parts and tools do I need to make the repair myself? My raw water system runs through seacocks in the hull, then through a strainer, through the V drive and then to the engine.

Click to expand...

One of the first things your going to need is a service manual from mercruiser, And it looks like your going to need service manual part number 90-816463 That covers engines - GM V8 (NO HIGH PERF) - SERVICE MANUAL #15

Your also going to need a new impeller at the very least and possibly a new impeller housing.

Here is a link to your sea water pump impeller.
http://www.mercruiserparts.com/Show...88.png&inbr=954&bnbr=160&bdesc=Sea+Water+Pump

And here is a link to all your engine parts for you to get familiar with.
http://www.mercruiserparts.com/selectDocs.asp?doc_nbr=17765

(FYI) You also posted this in the wrong forum area, This is the mercury outboard forum and the mercruiser / Inboard forums is going to be on down the list a few more, Out on the main page.

PS, if you could, Could you post your engine serial number so that I can confirm that I gave you the correct information here instead of me taking a guess like i did here? Thanks.