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-   -   Converting raw water pump (https://www.offshoreonly.com/forums/general-q/379689-converting-raw-water-pump.html)

jeffer 06-24-2023 06:00 AM

Converting raw water pump
 
I want to eliminate the raw water pump mounted fuel pump and go to electric fuel pump, and change the water pump to one without the fuel pump mount. Does the water pump #46-807151A12 require a different bracket or belt tensioner?

Tractionless 06-25-2023 11:46 AM


Originally Posted by jeffer (Post 4871508)
I want to eliminate the raw water pump mounted fuel pump and go to electric fuel pump, and change the water pump to one without the fuel pump mount. Does the water pump #46-807151A12 require a different bracket or belt tensioner?

There's a plate kit available to cover and seal the top opening for the fuel pump as well.

jeffer 07-09-2023 08:30 AM

I got the solution to all my questions from Dennis Moore @ Moore Performance Marine. What a great and knowledgeable man. The kind of customer service that is rarely experienced today. He not only solved my problem but restored my faith in American manufacturing. Thank you Dennis!

SB 07-09-2023 08:44 AM

Cool. :Thumbs.

And the solution was (insert drumroll) ….

jeffer 07-09-2023 11:11 AM

He builds the water pump intermediate housing from billet aluminum and makes his own V belt pulley (which is no longer available from Merc.),uses the Merc pump housing, and it all mounts to my original Merc. bracket with the rack and gear tensioner. All lines up perfectly. I then installed an electric fuel pump.

jeffer 07-09-2023 11:32 AM

He builds the water pump intermediate housing from billet aluminum and makes his own V belt pulley (which is no longer available from Merc.),uses the Merc pump housing, and it all mounts to my original Merc. bracket with the rack and gear tensioner. All lines up perfectly. I then installed an electric fuel pump.

SB 07-09-2023 01:32 PM

Okay, found it.
:thumbs
IndexofallParts

Helmwurst 07-09-2023 07:42 PM

Looks like he has the correct Carter fuel pump. 130.00, 60% less than the Merc replacement.

Rookie 07-09-2023 08:39 PM


Originally Posted by jeffer (Post 4872686)
I got the solution to all my questions from Dennis Moore @ Moore Performance Marine. What a great and knowledgeable man. The kind of customer service that is rarely experienced today. He not only solved my problem but restored my faith in American manufacturing. Thank you Dennis!

Or you could just buy an $8 block of plate. I've been using them for 20 yrs.
https://www.summitracing.com/parts/sum-402035

Helmwurst 07-10-2023 08:26 AM

Anyone interested in posting pictures of their electric fuel pump conversion/installation? I am considering that option for a Winter project.

cheech 07-10-2023 12:14 PM


Originally Posted by jeffer (Post 4872706)
He builds the water pump intermediate housing from billet aluminum and makes his own V belt pulley (which is no longer available from Merc.),uses the Merc pump housing, and it all mounts to my original Merc. bracket with the rack and gear tensioner. All lines up perfectly. I then installed an electric fuel pump.

I take it he sold you the housing he has listed for the 1996-2002?
Or did you buy "his" sea water pump housing for the 1991-1997 and still need the block off plate??

Helmwurst 07-10-2023 01:01 PM

Block off plates are available at any auto parts store or Amazon.

jeffer 07-11-2023 05:14 AM

I didn't want to simply block off the fuel pump mount because the lube was coming out the seals and being thrown all over the engine bay.I wanted to be rid of the whole misconceived idea.

Helmwurst 07-11-2023 08:47 AM

Seals are cheap and once you remove the fuel pump, you SHOULD not have any more issues. I don't see why you even need any lube in there if you are not running a fuel pump. Any conterpoint input to that?

jeffer 07-11-2023 05:44 PM

I wasn't sure if the bearings used the lube and or the eccentric for the fuel pump. If anything siezed because of lack of lube, it would ruin my day. Nobody seem to have any definitive answers, so I just wanted to be done with it. I know I could have stayed with the Dennis Moore version that kept the fuel pump, and it would have been a great improvement (and much more reasonably priced), but for me, I was done with that setup.

Tractionless 07-16-2023 10:31 AM


Originally Posted by jeffer (Post 4873000)
I wasn't sure if the bearings used the lube and or the eccentric for the fuel pump. If anything siezed because of lack of lube, it would ruin my day. Nobody seem to have any definitive answers, so I just wanted to be done with it. I know I could have stayed with the Dennis Moore version that kept the fuel pump, and it would have been a great improvement (and much more reasonably priced), but for me, I was done with that setup.

Yes the OE pump bearings are open design and use the lube in the cavity for lubrication. I have an aftermarket pump with sealed bearings, so if fuel is leaking into the cavity it won't make the lube a lower viscosity for bearing lubrication.


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