Please help with engine type selection!

[Tracymly]

I have a 1994 crown line with a DP – C1 dual prop outdrive. When I got the boat, the 5.7 L carbureted engine was toast from saltwater intrusion.
What I would like to find out is what year(s) 5.0 L or 5.7 L Volvo Penta engines could be installed without any major modifications. Someone nearby has a 5.0. Osi-ff with only 350 hours. Would this work? Any help would be greatly appreciated. I would like to get something dropped and ready or at least close to it. I forgot to mention the engine I’m looking at is a 2007.

 

[Scott06]

I have a 1994 crown line with a DP – C1 dual prop outdrive. When I got the boat, the 5.7 L carbureted engine was toast from saltwater intrusion.
What I would like to find out is what year(s) 5.0 L or 5.7 L Volvo Penta engines could be installed without any major modifications. Someone nearby has a 5.0. Osi-ff with only 350 hours. Would this work? Any help would be greatly appreciated. I would like to get something dropped and ready or at least close to it. I forgot to mention the engine I’m looking at is a 2007.

What size boat is it , I think you’d be better off not loosing displacement and power

 

[Bondo]

Ayuh,..... A smaller motor is never a good idea, in my book,....

 

[Tracymly]

What size boat is it , I think you’d be better off not loosing displacement and power

Thx for the advice! What year 5.7’s would work without major modifications? The existing one was a 5.7 carbureted. Thx for any help

 

[Tracymly]

What size boat is it , I think you’d be better off not loosing displacement and power

Its 25ft so your absolutely right. What year 5.7’s would work without major modifications? I’ve searched everywhere and can’t really come up with anything definitive. Thx!

 

[Bondo]

Its 25ft so your absolutely right. What year 5.7’s would work without major modifications? I’ve searched everywhere and can’t really come up with anything definitive. Thx!

Ayuh,..... '86 to '95,....
For the price of an intake manifold, you can run the '96, 'n up, which has Vortec heads, for another 20 plus horsepower,.....

 

[Scott Danforth]

What is your budget?

Your boat came with a 1992-1995 5.7 liter.

However a 1996-2013 5.7 will bolt right in

Your current motor most likely has bad exhaust manifold, so you have to replace them

The front accessories are probably good

I personally would look for a low mileage 1996-2000 5.7 out of a pickup truck or suburban, swap core plugs, head gaskets, and circulation pump for marine. Buy new manifolds and migrate your accessories and carb over. That would be about $1000

If you are looking at a remanufactured motor or a new motor. Look at the 6.2 liter motors

 

[Scott06]

Its 25ft so your absolutely right. What year 5.7’s would work without major modifications? I’ve searched everywhere and can’t really come up with anything definitive. Thx!

Yeah no way a 5.0 would do that. Answer depends on what u want out of the boat and how much you want to spend.
as mentioned you would be better off getting a 96 and up vortec engine . If it were me I would get a new long block and exhaust and intake manifolds . Drop in would be the same vintage you have with a little parts swaping the vortec will give u 30 more hp. You can see the generations in link, they also sell remains and complete bobtails

NEW Base Marine Engines - Marine Engines - Products

www.michiganmotorz.com

also have partials https://www.michiganmotorz.com/products/marine-engines/partial-engine-packages

that’s what I got from them in 2015, never had an issue with it

if it were my boat and I wanted to keep it consider up grading to the Chevy based 6.2 as a 5.7 is probably light on power for 25 ft

 

[Tracymly]

What is your budget?

Your boat came with a 1992-1995 5.7 liter.

However a 1996-2013 5.7 will bolt right in

Your current motor most likely has bad exhaust manifold, so you have to replace them

The front accessories are probably good

I personally would look for a low mileage 1996-2000 5.7 out of a pickup truck or suburban, swap core plugs, head gaskets, and circulation pump for marine. Buy new manifolds and migrate your accessories and carb over. That would be about $1000

If you are looking at a remanufactured motor or a new motor. Look at the 6.2 liter motors

Thx so much!

 

[Tracymly]

What is your budget?

Your boat came with a 1992-1995 5.7 liter.

However a 1996-2013 5.7 will bolt right in

Your current motor most likely has bad exhaust manifold, so you have to replace them

The front accessories are probably good

I personally would look for a low mileage 1996-2000 5.7 out of a pickup truck or suburban, swap core plugs, head gaskets, and circulation pump for marine. Buy new manifolds and migrate your accessories and carb over. That would be about $1000

If you are looking at a remanufactured motor or a new motor. Look at the 6.2 liter motors

Thx!!

 

[muc]

I personally would look for a low mileage 1996-2000 5.7 out of a pickup truck or suburban, swap core plugs, head gaskets, and circulation pump for marine. Buy new manifolds and migrate your accessories and carb over. That would be about $1000

I've always wondered about this.
Do truck engines have a windage tray in them?
All the Chev V8 boat engine I've torn down have them, but I don't remember seeing them in the few truck engines I've been inside.
Not really sure how important a windage tray is.

 

[dubs283]

Not really sure how important a windage tray is.

I know there are folks here that have forgotten more about engine assemblies than I care to learn but my wag is the duty cycle of the engine being more extreme (torque/max power) in marine applications vs automotive (getting up to speed then maintaining) requires more upper end lubrication supply so the oil available in the pan should have less chance of aeration. Just my opinion, tho

 

[Scott Danforth]

I've always wondered about this.
Do truck engines have a windage tray in them?
All the Chev V8 boat engine I've torn down have them, but I don't remember seeing them in the few truck engines I've been inside.
Not really sure how important a windage tray is.

Most of the trucks I pulled apart have a windage tray.

Windage tray is very important on sustained high-speed motors

Even the front drive motors have windage trays

 

[muc]

I know there are folks here that have forgotten more about engine assemblies than I care to learn but my wag is the duty cycle of the engine being more extreme (torque/max power) in marine applications vs automotive (getting up to speed then maintaining) requires more upper end lubrication supply so the oil available in the pan should have less chance of aeration. Just my opinion, tho

Most of the trucks I pulled apart have a windage tray.

Windage tray is very important on sustained high-speed motors

Even the front drive motors have windage trays

Thanks, I haven't been in a car/truck engine since the 70s. Always wondered about the windage tray. Pretty rare for a manufacturer to install a part that's not needed.

 

[Scott Danforth]

Pretty rare for a manufacturer to install a part that's not needed.

As stated, even FWD motors have windage trays. This is a LS4 that perforated itself

 

[dubs283]

This is a LS4 that perforated itself

Bitchin

Some of us live in the old days (along with present times) and see old style engines with original accessories on a seasonal basis

Lotsa motors still out der....

Let's get to the dry sump stuff already

 

[Scott06]

As stated, even FWD motors have windage trays. This is a LS4 that perforated itself

My 65 Pontiac had a factory windage tray also not a real high Revving engine 5200 was about it before the rods left the building …