Mercruiser 5.7L and 5.0L, help me identify a part

[TXGlastron]

I’d like some help identifying this part. Grok is telling me this is the Cool Fuel pump and reservoir. When I search on the internet a bit myself, I’m coming up with trim reservoir.

I have confirmed my anti-siphon valve is good, but I have no fuel pressure at the rails (checked with gauge.). I would like to replace what is likely the pump, filter, and reservoir all as one. I’m still an amateur at this, but have loved learning about this boat since my first post.

 

[TXGlastron]

(And if I am a betting man, this has to be fuel related. Those are fuel lines)

 

[racerone]

Power trim / tilt pump / motor / fluid reservoir.

 

[TXGlastron]

Well, after doing YouTube research, this is the trim pump and reservoir. I am way off!

 

[Fun Times]

You’re looking for a fuel pump for your engine model?
Hopefully you know your engine serial number?.. if no, engine model type carb/efi/etc. and year may help get started along with an overall photo of the engine.

With the 5.0 and 5.7 reference in the title, are you unsure of what engine model you have or are there 2 engines in question?

 

[TXGlastron]

You’re looking for a fuel pump for your engine model?
Hopefully you know your engine serial number?.. if no, engine model type carb/efi/etc. and year may help get started along with an overall photo of the engine.

With the 5.0 and 5.7 reference in the title, are you unsure of what engine model you have or are there 2 engines in question?

Thanks for the reply. I originally had the 5.0L. It was not winterized properly, and I now have a 5.7L Quicksilver rebuilt engine. I posted that way since the trim pump and Cool Fuel module should be the same for both engines (unless I’m way off on my research there).

Right now, my troubleshooting for the engine not starting this year seems to be either the fuel pump or the Cool Fuel module. I’m not getting pressure when I take a reading on the fuel rails.

 

[Fun Times]

Thanks for the reply. I originally had the 5.0L. It was not winterized properly, and I now have a 5.7L Quicksilver rebuilt engine. I posted that way since the trim pump and Cool Fuel module should be the same for both engines (unless I’m way off on my research there).

Right now, my troubleshooting for the engine not starting this year seems to be either the fuel pump or the Cool Fuel module. I’m not getting pressure when I take a reading on the fuel rails.

Gotcha, all the original accessory parts came off of the original 5.0 and went onto the new 5.7l engine block.

If possible, try to locate your 5.0 serial number for accuracy of parts lookup.. if not, year and photo could help.

Do you hear the fuel pump turn on for two seconds sometimes associated with a beep of a warning horn when you first turn the key on, but not crank the engine over to start just yet?

Also what stern drive model do you have?

 

[TXGlastron]

Thanks Fun Times. I’ll grab a couple of pictures in just a bit. I do still have the 5.0L info because they forgot and gave me the old cover on top of the air intake.

I have the Alpha I drive.

When I turn the key, I hear the whine for about 3 seconds. When I try to start, it has the engine “sound” of no fuel and just turning over. I have not pulled plugs yet, and will do this. At the end of last year, I had a symptom of losing power at wide open throttle. It would suddenly cut way back as if the fuel had been cut. It wasn’t happening “always” so I was having trouble diagnosing it. I ended the year thinking it was the anti-siphon valve.

 

[TXGlastron]

Gotcha, all the original accessory parts came off of the original 5.0 and went onto the new 5.7l engine block.

If possible, try to locate your 5.0 serial number for accuracy of parts lookup.. if not, year and photo could help.

Do you hear the fuel pump turn on for two seconds sometimes associated with a beep of a warning horn when you first turn the key on, but not crank the engine over to start just yet?

Also what stern drive model do you have?

Here is the serial from the original engine.


This is the front. Is the Cool Fuel module at the front and bottom of this picture?


Pardon the junk below the engine. I had just cleaned everything off with engine cleaner and have not yet cleaned the under.

 

[Fun Times]

The engine serial number is challenging to read but I suspect the number to be 1A087486 which is close enough to locate your engine parts... I'll link 3 good places for you so you can compare notes as you order part items over time...You'll want to save this number somewhere even if you put it back on the engine itself for you or someone else.

Genuine Mercury Marine parts, large inventory, fast shipping. 5.0L MPI ALPHA/BRAVO 0W650000 THRU 1A299999

5.0L MPI ALPHA/BRAVO 0W650000 THRU 1A299999

www.mercruiserparts.com

https://www.marineengine.com/parts/mercury_marine_parts/sn/1A087486

https://www.crowleymarine.com/mercruiser/oem-parts/stern-drive/1998/4m4102mus

Here will be one parts catalog for your transom assembly and stern drive unit too that comes up under 1A154734... When possible, look on the side of the stern drive upper housing for a serial number and/or the gear ratio as you'll want to store that info too should things ever need to be changed or serviced.

https://www.crowleymarine.com/mercruiser/oem-parts/stern-drive/serial-range/0l100040-up

Being an Alpha stern drive the fuel cooler pump will be mounted down past/behind the belt driven power steering pump...You can't see it in the photo but it will rest way down low of the port side of the boat (< left side as you face forward (Bow) sitting in the driver's seat) about where the engine block and oil pan meet.... The pump will be hard to see as there is a black cover over the holding assembly...It will also be behind the front engine motor mount....Sometimes the pump is challenging to get at and takes some time to R&R the components if found needed.

The 32-864579 water hose we see leads to the fuel pump....The yellow and blue device we see heading down is a water flow check valve designed to try and keep the hot engine/thermostat water from flowing down to the fuel pump cooler helping to avoid what is called fuel vapor lock when hot not letting the engine start during hot times...

Not the best but here's a general video of someone doing it before.

Fuel filter part number is item number 4, https://www.mercruiserparts.com/bam/subassemblydetail/51444443/28194112

4	802893Q01	FILTER-FUEL Quick Silver branded name/color white, which is the same as,		ACT		$19.79	$19.31	1
4	802893T	FILTER-FUEL MerCruiser branded name/color black.

Service Manual part number 864260T00,

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