Can I replace a 351 with a 302 in 1993

The Above and Beyond logo reminds me of the Air Nautique logo:

jbear wrote: someone 'gave' that boat to you...you must be a heck of a Pastor! john

yup...can see why now...

Thanx HW...but how you find some of this stuff is amazin'



john

Anyone else remember the 'Reverend Shred' series of water-ski t-shirts?

wow..nice.

someone 'gave' that boat to you...you must be a heck of a Pastor!

get it running 1st...then you can address the looks.



john

Nah, there was some decal bleed over from 92 to 93. Pylon and port coaming pad are more telling.

It's a 93.

looks like you have a standard rotation engine, and a 1.23:1 transmission.   This boat is not a "scrappy" as described earlier in this thread.   

before you go any further, you need to do some troubleshooting... visually first.
-   check the "casting"(freeze) plugs that are around the perimeter of the engine...   if they are pushed out, you have likely had a freeze situation. I suspect from your location that this is not likely, but they are easily repaired by putting in a new brass set. (replacing does not mean the problem is repaired, but this is the first step)

- look at the exhaust manifolds (black triangles on the side of the engine) , this is a good place to start with your testing...   Pull the manifold assy, and pressure test the manifolds.   there are several threads on how to do this, but there is a picture thread in the FAQ section (see CCF FAQ thread)    Once you determine if the manifolds leak or not, report back and we can give some additional direction.   You'll need some new gaskets to put this all back together, you can get them from Zach @ n3 boatworks, or skidim, Christines marine, etc...   BTW, you'll want to soak the manifold bolts in some sort of penetrant for a few days, and possibly use an impact wrench to pull the manifolds.   this may be the most difficult part of the repair, but can be done.   broken bolts may come with the territory, but not necessarily a guarantee....



welcome aboard, and congratulations on a fine machine... several rough ones have appeared from time to time, once repaired, they seem to be well loved.   

Pastor Ken Mahan wrote: I uploaded the pictures to my profile.

could not see them...can you follow GaryS suggestion & just post the pics here in the thread?



john

I uploaded the pictures to my profile.

Engine rotation may not matter to the pastor but I would imagine that minimizing costs might be. In which case, it would be most cost effective to replace the block and rotating assembly with the equivalent size and rotation as what was there previously, else all of the other parts needed, from oil pan to accessories, starter, distributor, prop, etc etc etc will NOT swap over, and that can get very expensive.

Bri892001 wrote: Actually, we still don't know if the original poster has a Scrappy.

I was trying to explain that to Art!

Pete, my intent in that post was to explain to you why there was a '93 with a RH engine. Your post previous to that sounded as though you didn't know that the engine rotation has been settled because now there is no doubt that it is a Scrappy.

Pete, it's what we referred to as a "scrappy" Ski Nautique. After we went to the reduction gear trannie using LH engines, some diehards (like me) favored building a reduced-cost SN using a 1:1 gear. It was offered with no options, and standard was a 351 RH on a Warner 1:1. That's what he has. (see posts above)

Ah, I'm glad that we cleared that one up! I need to learn to think faster before I jump into these threads. Now you have another option..... Put a LH 351 in it and a 1.23 (IRM40A) transmission. If it was mine, I'd want to stay with the 1 to 1!

BTW, for those who might be interested, on the PCM 1..23 : 1 reduction gear, 40A the "A" stands for "Angle" because the input shaft is at a 5 degree angle to the output shaft.

The 1 : 1 is a 40I (as in capital "I") is for "In-Line."