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What's special about a 2009 5.0 MPI block?

N

noknots

New member
1st post!
Looking at a boat with a frozen engine, as in frozen water jacket; it needs a block. Having a real hard time finding one for 2009-ish. It's a total deal breaker if the blocks are hard to get i.e. spendy.

I'm also looking at a 5.7 upgrade but that seems even more complicated. The 5.0 at 260HP is fine for this application.

If I buy, it will have to be before the weekend, so time is short (price seems right).

I've repowered 4 other boats, 3 for the same reason, all carbureted, and straight forward. This one has me concerned....

Thanks for any insight, it is appreciated.
 
Your 2009 Merc OEM part number to start would of been 863660A2
8M0088396 Newer #LONGBLOCK ASSEMBLY863660A2 Old NumberSS/NLAmagnify.gif

Looking at all associated notes may help you with the buying/conversion questions.

www.crowleymarine.com

863660A2 LB 5.0L MPI - Mercury Marine | Crowley Marine

Find LB 5.0L MPI - 863660A2 here. Offering discount prices on OEM Mercury Marine parts for over 50 years.
www.crowleymarine.com www.crowleymarine.com
3 Product Variations available:
Brand *NEW* Longblock
GM 8 Cyl., 5.0 Liter Gen+ 305 V8
Replaces 1998‑2015 5.0L Carbureted, Throttle Body Injected EFI and Multi‑Port Injected MPI engines.
Crate Engine Part #DescriptionSerial Range
8M0187351New Quicksilver 350 MPI Bravo Crate Engine 2005-20150W310000 and Up
8M0187352Quicksilver 350 MPI Bravo Crate Engine 2002-20040W600000-0W029410
8M0093550Quicksilver 350 MPI Bravo Crate Engine0W310000 and Up

NameSKUConditionEngine Description
NO LONGER AVAILABLE

Pro Series Longblock - 5.0L - Remanufactured805636R5remanufacturedRemanufactured PRO‑Series Longblock GM 8 Cyl., 5.0 Liter Non‑Gen+ 305 V8 (Left‑Hand Standard Rotation) Replaces 1987‑1995 flat‑tappet sterndrive marine engines.
NO LONGER AVAILABLE

Pro Series Longblock - 5.0L - Remanufactured863660R02remanufacturedRemanufactured PRO‑Series Longblock GM 8 Cyl., 5.0 Liter Gen+ V8 (Left‑Hand Standard Rotation) Replaces 1998‑2015 GM 5.0‑Litre carb and EFI/MPI marine engines. This engine is interchangeable with 8M0057443.
NO LONGER AVAILABLE

Pro Series Longblock - 5.0L - Remanufactured8M0057443remanufacturedRemanufactured PRO‑Series Longblock GM 8 Cyl., 5.0 Liter Gen+ V8 (Left‑Hand Standard Rotation) with remanufactured Vortec cylinder heads. This longblock is packaged in a one‑way container. No core or container charges apply. Replaces 2002‑2015 Vortec GM 5.0L Multi‑Port Fuel Injected MPI sterndrive and inboard marine engines. This block has provosions for a CPS (Crank Position Sensor). There are no provisions for a mechanical fuel pump. It is equipped with a harmonic balancer so it can be used with 1998 and newer carbureted engines if the hole for the crank position sensor is plugged. This engine is interchangeable with 863660R02.
Much more detailed info of finding the correct engine block can be located within the following link/s,

Marine Engines, Longblocks & Repowering Topics | PerfProTech.com

Learn about marine engine topics ranging from how do I replace my engine, my accessories are still good can I just replace the block, are automotive and marine engines the same, do the new EPA regulations apply to marine engines, is the 454 different from a 496, etc.
www.perfprotech.com
Such as
5.0L/5.7L EnginesHow do I select the correct new 5.0L or 5.7L longblock?
Remanufactured Marine EnginesHow do I select the correct remanufactured marine longblock?
 
Ayuh,...... Just buy a 350 long block, swap the accessories over from the original motor, 'n go boating,.....

Block, for block, a truck motor, 'n boat motor are nearly identical,....
 
What is special they stopped making the 5.0 , so you gotta get a rebuild or move up to a 5.7 which if you have MPI requires a ECM relfash. I bought a new 5.0 base engine in the end of 2015 they stopped making them shortly thereafter and prices went up $1k over what I paid.

You can use a 5.0 reman or truck engine out of a wrecking yard- only thing you need vs a carded engine is the crank position sensor on the timing cover- most have them. My carbed one does and it sits unused.

A place like michigan motorz would likely have a reman but maybe not or you may need to supply a core.

If you like the boat and can invest the money I would go 5.7 and get the ECU reflashed. You may need a merc dealer to do this.
 
From what I've learned, the 5.0 is not available. I did find a complete used engine for $10k; no.

A 5.7 option requires the right 5.7. Something about the cam position sensor mounting is required and probably more. Insight on this would be appreciated. And there's the reflash. I've not talked to anyone but those services are available.

I've also read that the outdrive ratio goes from a 1.47(?) to a 1.5:1 for the 5.7. Not sure how critical that is or if it's correct. I'd rather not change props.
 
noknots said:
From what I've learned, the 5.0 is not available. I did find a complete used engine for $10k; no.

A 5.7 option requires the right 5.7. Something about the cam position sensor mounting is required and probably more. Insight on this would be appreciated. And there's the reflash. I've not talked to anyone but those services are available.

I've also read that the outdrive ratio goes from a 1.47(?) to a 1.5:1 for the 5.7. Not sure how critical that is or if it's correct. I'd rather not change props.
Click to expand...
If you want to keep it simple here is a reman 5.0 from a reputable supplier https://www.michiganmotorz.com/5-0l-vortec-marine-engine-1996-current

its not a cam position sensor it is the crank position sensor on front timing cover all mpis use them.

drive ratio u if you were previously propped correctly you can re prop to keep the same ratio. Likely your 5.0 came with a 1.62 drive, a 5.7 will come with a 1.47 or 1.50 ratio ( no working diff between them) . I repowered a 4.3 to a 5.0 and kept my 4.3 ratio 1.81 drive, just went up in pitch from 19” to 21” prop.

Again best bet if u want to keep it long term is by a 5.7 and reflash the drive , yes more complicated but if you like the boat best ( not cheapest) path forward. If you want to keep it simple, get the reman 5.0 and go boating…you may need an i take and likely exhaust manifolds. Also make sure your winterization procedures are correct so you dont deal with this again
 
Well here's the followup.

Boat was a basket case. It was full of water, as in up to the floor and valve covers. Everything below there was under water. Probably well over 1,000 lbs in it.

It was a pretty hard no just walking up to it, but once inside; no. Been sitting outside uncovered for who knows how long. Registration sticker was 2018, which doesn't jive with seller's story. It goes on and on. It's a shame really.
Thanks for the advice.
 
Ha ha ha ha I know, some people are selling actual straight up garbage for stupid money these days. I mean how hard is it to pull the drain plug out?
 
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