exhaust rainbow slick

Well , I am finally getting some time to play around with the 62 cla$$ic...it has a newly rebuilt 312 ford Y block.
The water comming out the exhaust ports appears a bit fuely(if thats a word)...leaving
a bit of a rainbow slick in the water or on the drive.
No smoke though...??? If the carb is set up too rich could this be a result?

I replaced the two longer sections of exhaust hose...the old sections were pretty slimmy inside with gunk and carbon build up. Did not replace the two sections that serve as elbows and curve up to the manifolds(they are in good shape)...I a$$ume there is gunk inside them too...could that contribute to the problem?

The carb on this one is a side draft carter.....the engine fires right up, idles well and runs under load great. No issues other than the water that is ported out.

Thanks in advance!

    Probably a bit of oil from somewhere than gas. You would of probably smelled the gas back there if it was. Just a guess....

                                 Jeff....

    ?????Fresh rebuilt engine not "broken in" yet and shes spillin a bit out the pipes??? Youre right, doesnt take much oil sor a rainbow. Does it do it all the time or just once, if all the time that would be another guess.

                                   Jeff...

Just thought of this(dah)...before I started it the other evening, I was adjusting the throttle cable and foot pedal...and moving fuel in the process....it was flooded when I first tried to start it, but today , I pumped it once and fired it up fine and it was better....even looked cleaner comming out. Maybe , fuel was dumped down the intake a exhausted out.
What do you think?

Have you broke her in yet?

Ok...it is fuely and not oil. I don't know jack about the carb...but adjusting seems easy....idle screws and throttle.

It would appear to me that the carb is running rich and exhuasting a bit of fuel out.

Does that sound likely? Other than that...it fires first crank, holds ilde well and revs fine and no hesitation under load. It's running well...but still a bit of rainbow on the drive.

I wish it was a holley...try this one...2 carters with the side drafts.

Do you think if the carb is too rich I could see some fuely exhuast?

Gotta be dumpin a bit into the intake I figure!

Good info 63CCSN...that is what I am suspecting! People keep telling me to keep her original...I have been looking at the blue thunder intake...and adding a holley.

stang72,

I just emailed you about those 312 exhausts from the general discussion page.... thanks again!

The blue thunder is going to give you some more horses. Along with the blue thunder, you could add a multi spark distribution box and get a smoother idle and quicker response on the hole shot.

I don't know what the motor box is like on your cla$$ic but the blue thunder and new carb would make the motor have a little higher profile than the side drafts carbs.

As for the orginal vs. modern carbs/intake... on the Y block in the '63 Ski Nautique I am working on, I plan to save the side drafts. The blue thunder intake and new carb just bolt on... if I ever want to sell the boat and someone wants it to be orginal I figure I could give them the carters and orginal intake as part of the deal. In the mean while I want to have a great running boat to enjoy.

Plus, I would say that the a new carb and intake set up would be safer. I don't really like the idea of fuel and vapor going where it wants to under the motor box, and in bilge.

If you stick with the Carters and you want to try adjusting them, I think I have an orginal manual on them that I can photo copy and send to you. Let me know and I will paw through my junk and find the manual.

stang, dont rule out the trans cooler.

make sure your not loosing any trans oil, it may be low on the stick, if it is a borg warner the oil is low pressure cascading oil and usually will leak slower than a PCM in which that is charge pressure which will leak quickly. If you do suspect the cooler remove it and plug one end and put a air chuck in the other they are 3/8 pipe and pressurize to about 50 psi and then put under water, the rest is self explantory

actually it will run its coarse then out the back of the boat with the water thru the exhaust, sure tail sign will be your trans will missing some fluid

probably not the cooler because your getting the oil or fuel only on one side, to be on the safe side since it is a new rebuild try a compression test on that bank and see what you come up with, any oil that enters the cylinder will usually turn into white or blue smoke so it wont be valve stem seals or broken oil control ring, if a valve wasnt seating as your friend said it would definitely show up on a compression test, I always stress compression tests for the same reason when you go to the doc's office and the first thing they do is check your blood psi. a compression test will answer alot of questions.....Is there any type of missess in the engine? also pull your plugs on that bank and tell us the condition, pay close attention to them     eric

I think a leakdown test would be a much better indication of what is going on.A compression test will show a serious problem,but you may miss a minor one with the compression test.Also,if you suspect fuel has been entering the manifold unmetered,check the oil for gas contamination.If there is excessive amount of fuel in the engine oil you could wpie that motor right out.
    
     Mike