Engine identification problems

Hi new to the forum and I could use some help,

I recently purchased a 1981 Ski Nautique. According to the PO it is all original. All the equipment is there, just in sad shape. It was left uncovered on a trailer in the Florida weather since 1995!

The engine is marked:

Commander FORD 351. casting number above starter 77AY-6015-AA   
intake manifold casting D7JE-0425-8A
water pump D3JE-8505-AA

Transmission plate Red model 10-17-001 1:1

My question is what motor do I have? I have removed it from the boat and have almost torn it apart completely to send to the machine shop. I do not know how to determine rotation. I need to purchase a complete rebuild gasket kit to get it back together and I am not sure which kit to buy 351W? Also need starter/alt/etc......

Which transmission model? 70C or 71C and rotation?

The stringers need to be done. Pulling the floor now. Looks like secondaries have been partially repaired or possibly spliced in the past. I will know more when the floor is up.

Any help will be greatly appreciated. I have been trying to attach pics for the last two hours. They are too big!! Hopefully photo bucket album went through!

Thanks, Rex

Sounds like the boat was originally equipped with a 240hp Ford 351w, marinized by Commander. Rotation was undoubtedly RH (reverse rotation). Be weary of "rebuild gasket kits"... make sure you use high quality gaskets (Felpro, PCM, etc).

The transmission model number is 10-17-001 just like the tag states. It is an updated version of the 71C. The guts of the transmission are the same whether bolted to a RH or LH engine, but the pump must be indexed properly. Dont forget to replace the damper while its apart... I recommend the Alta (Sachs) from ebasicpower for $90.

Try resizing photos on your computer before attempting to post or upload to photobucket. Microsoft paint can do one file at a time, but Microsoft photo editor can do them in batches. Those are basic programs that have come on all PC's for the last 10+ years.

I recommend adding a more specific location to your forum profile so people know where youre from... you might get local help/knowledge.

arghhhhh...lets try this

http://s481.photobucket.com/user/rapok4/library/

TRBenj wrote: The transmission model number is 10-17-001 just like the tag states. It is an updated version of the 71C.

LOL I missed that.

Rotation of engine with a 1:1 ratio trans = rotation of prop. is your prop stamped LH or RH?

rapok4 wrote: There is no rotation stamped. I understand that prop rotation is not an accurate way to determine engine rotation.

True, if you have a gear reduction transmission.   A 1:1 Borg warner transmission rotates the prop the same as the engine.

Right Rotation

My eyes suck worse than my monitor. In the trans pic, is the arrow pointing at? or away from the P in the word TOP?

RH rotation is now confirmed.
That puts the flywheel rolling clockwise when viewed from behind.

I just pulled the engine and transmission. It was a beast to separate. I have not changed a thing.

Is there any chance the prop was replaced backwards?

Leak, hahahahaha it was under a foot of rain water when I got it.

This was after I pulled the rear floor!!!

Thank you for all the help. Just to clarify Gary S;

Go ahead and make the engine and transmission RH rotation. Easy enough,everything is going to be completely rebuilt anyway.

mark c wrote: The prop you have is a RH rotation prop. Don't know how a LH rotation engine works with a Rh rotation prop, but I can guess not so well.

LOL I would guess not.

Rex, I hope you got a good deal on that bathtub!

Actually got a very good deal....wife agreed to a project!!!!

Mark
If you go to the reference section on this site and find the B/W velvet drive installation manual and look at page 3 you'll find some interesting semi confusing reading. Make sure you're looking at the installation manual.



The easiest way to get this straight is that the arrow on the pump needs to be pointing in the direction the engine rotates(when it's at the top position) or it won't work at all. You can ignore all the RH/LH stuff and the arrow works. If the arrow is pointing the wrong way, you rotate the pump so the other arrow is at the top.

The one in the picture is set for a reverse rotating engine like Baitkiller pointed out

Ken O