Which Engine have I got

Hi Guys
We recently bough a 1980 ski nautique but can't find any engine number/ identity.
Looking at the manuals I think its a Ford and as far as I can see the plate should be under a bolt on the inlet manifold.
We've searched but can't find it, the velvet drive 1:1 plaque is there.
Attached several pics, can you help. Also not sure which the relevant manual is in your lists???
Overal the boat and engine needs TLC but it runs well out of the water and its now freezing/snow here so its not easy to get to the boat.
Can't wait untill Spring.
Thanks for any info at all. Chris

FORD! Sorry!

I meant correct manual for the age of the boat in the reference section?
Thanks

Just to elaborate, some parts are OK to use from automotive apps, but others are not.

I would venture to say that those heads have been swapped out because i do see a bolt blocking the exhaust or I believe EGR port on the starboard back head. its a slight possibility that you may have a 302. what model boat?
but to verify rotation, either click the starter or look at the prop for the direction it spins in order for the boat to go forward

Chris,
The engine if original should be a reverse rotation from a aoutomotive. The prop viewed from the aft end of the boat will rotate clockwise for forward.

Unleaded is fine. Don't waste your money if someone trys to sell you a "lead substitute".

The 351 has proven itself to be a very good engine (even though it's a Ford! ) and has been used for years.

Welcome to CCfan.

Hi Eric
We arent sure which model apart from the boat serial number ends 80 but attached pictures. As to the bolt as you can see all paint looks the same, I assumed from new???
Thanks

boat dr wrote: horkn wrote: Just to elaborate, some parts are OK to use from automotive apps, but others are not. That is only your opinion...........Boat dr

It's not an opinion if it is a fact.

So do you think there is any difference between an edelbrock performer intake manifold for a car and for a marine app? The GT40 heads PCM used were automotive ones with brass freeze plugs fitted. The intake manifold on GT40 EFI motors is a GT40 automotive piece, with automotive fuel injectors. Obviously there are more I could point out, but you should already know which ones to and which ones not to use.

For the original poster, you want to use a marine carburetor ( if equipped with a carb which yours should be), marine alternator, distributor, flame arrestor, starter, fuel pump.... those are the obvious ones.

The boat looks to be in great shape, although somehow it got bedazzled.

In reality the motors of that era were considered industrial and not Automotive. The base package could have found it's way into a large generator or compressor as easy as marinized and in a boat. As Far as the marine only parts of course is fuel related and electrical, Carb,fuel pumps, Starter, Alternator, Distributor, and other small items such as brass freeze plugs and even gaskets.
Take a measurement across the top of the exhaust manifolds as the photos you supplied are for me a little off. Like some one else said you could also have a 5.0(302ci). A measurement will help as a 302 is narrower then a 351. Either way a large number of the parts needed for repair and or service are the same for either the 302 or the 351.

look up rebuild......clean and paint

would that be rust on the port head cast plug? oops, sorry brass does'nt rust

Great, that should prove it.
I'll take pic and measure when I can as its deep snow here(well its deep for us 2 inches!!) Chris

If you need parts these guys have a small amount of marine and RH engine parts.

Real Steel

did you determine yet if it was a rh or lh engine yet?, i am suspecting because of the bolt on the back of the head that maybe it is a normal rotation 5.0 automotive engine

Hi Guys- sorry its been a long 2 weeks!!!!!!!!
We've now uncovered it after winter, and ran the motor up and it seems fine, soon to have it on the water for the first time.
Checked the rotation as asked above and its counter clockwise looking at the pulleys end so it seems to be an original engine?
I looked at the ford trucks diagram and wasn't exactly sure which it was tho I think its the 351W but measured between (inside to inside) the manifolds and it was 21 3\4 inch or for anyone metricated 555 mm.
So we think its a ford 351-W 5.8 litre PCM original engine, is this correct.
Well change the oil and filter, will the car filter be the same and what is the best way to remove the oil?
BTW we have also started removeing the star decals that you all so liked!!!
Thanks Chris.