Replacement engine for 1993 SNCB?

Well, it looks like the brackish water has taken it's toll on my engine. I have not pulled apart the engine yet but I anticipate repowering my 1993 Ski Nautique base boat (351 carbed, not GT40).   I have water filling up my cylinders on the left side.

A couple of years ago SKI DIM had a PCM Chevy conversion, complete engine which would seem to be convenient but no longer are available from them. Also, I have always had boats with Fords and I really like the low end torque, and sound of the Fords.

I cannot seem to find a complete engine for a 351 at all, I am finding long block remans, Michigan Marine, and others have these ready to go. Of course this means bringing over my tin and other 25 year old parts

So, I realize there is not "right answer", but for those of you with reverse rotation, carbed 351 engines, what are your recommendations for a repower?

93 Ski Nautique wrote: Well, it looks like the brackish water has taken it's toll on my engine. I have not pulled apart the engine yet but I anticipate repowering my 1993 Ski Nautique I have water filling up my cylinders on the left side.

John,
Could the problem just be exhaust manifolds or maybe you just want a new engine? Boats run in full salt replace manifolds on a regular basis.

Orlando76 wrote: Gary S wrote: You sure you have a reverse rotation? What trans is in it? 1993 is almost guaranteed to be LH. ‘94 they sort of reintroduced the RH for the year. .

Almost but not quite, here's a quote from one of his old posts    

93 Ski Nautique wrote: My boat is actually one of the "base" boats. It does not have the ProTec, that was the higher horsepower engine right? The boat has a 1.1 straight transmission, the engine is at an angle like the older ones, and it turns a 13x13 prop. All wiring is original other than plug wires.

You sure you have a reverse rotation? What trans is in it? -

Yes, I believe so, looking at it from the front, the engine turns to the left, the firing order on the tag is 18456273, the model is PRD-PR-R10.

The trans is a PCM 1-1 that I believe they only used on the "base" boats that year. The engine has the angle to it like the older boats,   The output shaft rotates the same direction as the input shaft.

Could the problem just be exhaust manifolds or maybe you just want a new engine?   Boats run in full salt replace manifolds on a regular basis.

I wish it was just the manifolds, I have done the manifolds a few times on this engine over the years, always before I had an issue. Hoping this might be the problem now, and since the manifolds on the boat were about 5 years old I just replaced again, and I still have water going into the cylinder. To gain even more confidence in my diagnosis I slowly added water to the engine (not running, with the exhaust hoses blocked off) until it was full. I then cranked it over without the plugs in it and found cylinder #7 was taking on water.

This boat has always run perfectly, starts great, runs great. Incredible boat, I want to get it back running again ASAP:)

You sure you have a reverse rotation? What trans is in it?

How about ATK Performance engines in Texas.

DMA1R would be the model that should work for you. Reverse rotation one piece rear main seal, standard output 240 ish HP

They sell through Summit, Jeg's etc but if you call direct to ATK to check on availability , they'll probably hook you up with their Gearhead Engines branch that sells direct to the public and sometimes they have a 10% discount.

I've had good luck with them, shipping is free and fast.

Probably 5 days on a tractor trailer, it gives you time to pull the old one out, strip the parts you need and be ready for the new one.

Here's a link to their marine engine listing page

link

Here's a lijnk to it on Summit's site

link

It's a newer block with a dipstick hole in the block, you have the dipstick in the oil pan and the block hole can be plugged.

It's about a 3/8 inch hole below and between the #7and 8 spark plugs, if you don't plug it oil mist will come out

A marine long block from anybody will be your fastest route to go assuming you figure your engine right now is toast.

+1 for the ATK. I’ve done a Jasper, then an ATK, then a “high end” local rebuilder and the last rebuild which was for my 93 SN I went with the ATK again as I’ve felt they’ve been the best so far. I purchased through Summit. It arrived in maybe 5 days and I would go ATK for the next rebuild I might need.

I just purchased an intake manifold from Outlaw in Florida, I will work on the other parts and likely order an engine soon.

Thanks again!

I thought all felpro’s were stainless ringed now? I had use regular automotive felpro on my HM first time around with no problems, when I went with gtp’s and before I took it apart I decided to use Marine ones. Don’t know who made them, got them from skidim they Suspiciously looked oem Ford not felpro

Gary S wrote: I thought all felpro’s were stainless ringed now? I had use regular automotive felpro on my HM first time around with no problems, when I went with gtp’s and before I took it apart I decided to use Marine ones. Don’t know who made them, got them from skidim they Suspiciously looked oem Ford not felpro

Check the link below Gary

It has a picture of a Ford marine OEM head gasket that I took out of a PCM 351w engine that had never been apart.

Part number D7JE-6051-AB stamped right into it.

A magnet is strangely quite attracted to it

link

Not being sure if a Felpro marine gasket is also 400 series or 300 series, I figured the only way to find out was to order a couple of FelPro 17060 351W marine head gaskets and give them the same magnet test.

I guess I'll know in a week or so

By the way, if somebody is looking for these gaskets, try Rock Auto Parts

19.84 each as a wholesaler closeout. So 2 for about 50 bucks when shipping is included

Not many left, so hurry up

Should have asked Ken, I have the Severe Duty 500 series and Marine gaskets in my garage if you wanted a test. The lower grade stainless is magnetic but not as magnetic as steel.
I used to know the grades but it escapes me now.

The 500 Series HD head gaskets are great gaskets for performance engines, the Stainless fire ring can hold up against detonation 3x better than standard steel.
They were developed to help Heavy working gas engines. Dump Trucks, tow vehicles etc.
They are flat pressed just like the performance and Marine but still use the standard steel body in the gasket. They are not much more money than a stock gasket. A good upgrade.

Ken, 351 W no luck, part has been discontinued.
I just checked the Fel-Pro listing.

I believe these were available when the 500 series were created back in the early 2001.
Today the listings available for Fords are the 520SD for the 460 or the 525SD for the 300 6 cyl and the 4.0 V-6, no coverage for the 302, 351W sorry.
In GM you can still get the 500 series for the 350 501SD, 305, 454 early and late, 4.3L
The old 2.8L V6, the 3.1L V6, the old 2.5L 4cyl, which I believe would cover the 3.0L GM 4 cyl used in so many Volvo Penta boats and the generators.
The only Dodge covered is the 3.9L V6.

These were originally only sold to the large rebuilders who had hard working customers.
I know the 4.3L GM V6 was only added to help a customer that supplied UPS.   UPS had many 4.3L's and the drivers were pounding out the stock head gaskets.
Later Fel-Pro added them as a Heavy Duty or Super Duty option for sale to everyone but there were never really advertised.

I don't know if the lack of Ford Small Block coverage reflects the stock gaskets rarely fail or if the Ford head bolts do a better job of protecting the head gasket from failure.
If there was demand they would still be available.

460's were in many Motorhomes and hard working trucks so they are still available.
4.0L Ford V6 still available says it must have been a weak design and the rebuilders want a better than factory product.
The 300 Ford 6 part 525SD was also used in the old UPS trucks and many medium duty trucks and delivery vans, still available to buy today.
Looking at the part numbers available today there are many gaps.
Lots of parts were discontinued.
502-504, gone
506 and 507 gone
These were some of the first released parts but when parts don't sell enough volume they are discontinued.

Allright nuckelhead,   I did not know your mechanical experience was limited to Ford Small Blocks.   I thought you might wish to know the GM options are still out there.

I felt bad for directing you to the 500 series only to learn I led you awol with no Ford small block coverage.   They really are a great gasket for the price, you just need to build a big block 460 or a Chevy!

KENO wrote: Not being sure if a Felpro marine gasket is also 400 series or 300 series, I figured the only way to find out was to order a couple of FelPro 17060 351W marine head gaskets and give them the same magnet test. I guess I'll know in a week or so By the way, if somebody is looking for these gaskets, try Rock Auto Parts 19.84 each as a wholesaler closeout. So 2 for about 50 bucks when shipping is included Not many left, so hurry up

Well, much to my delight the USPS brought me a package today. It was the gaskets I ordered from Rock Auto.

I figured that now I could compare the old Ford OEM marine gasket mentioned earlier in the thread with the brand spankin' new FelPro 17060 351W marine gasket.

Pretty easy to do

We'll start with the looks category FelPro wins hands down since it's brand new as compared to a 32 yearold well used Ford gasket

Then movin' on to the material category, specifically looking to see if the FelPro gasket is as magnetic as the Ford gasket. The FelPro advertising says that their marine gaskets are made of 300 series Austenitic stainless steel underneath the outer covering. (code for non magnetic)

Me and my trusty magnet held up the Ford gasket for a photo. It's quite magnetic.

What will happen with the FelPro was the big question. 300 series stainless would pretty much ignore that magnet and fall to the floor laughing at me.

I put the magnet on, held it up, took the same photo and it hung there just like the Ford gasket did

It took the same amount of force to pull the magnet off of either gasket.

Here are some pictures, you'll have to rotate them 90 degrees clockwise since the computer wasn't cooperating. The third picture is the FelPro package label







So much for that comparison I guess. Both would appear to have the same composition metal in them. Some 300 series that's magnetic or 400 maybe

If you have your doubts, just find a magnet and try it on one of these FelPro 17060 gaskets, it's pretty easy to do