91 nautique excel will not throttle up under load

Good morning, I had just put a rebuilt engine back into my 1991 excel nautique last week. With this process, I have gone through new fuel lines cleaned the gas tank it has an hei pertronix distributor on it. I got it running on the trailer and it runs great, will rev up and go in and out of gear fine. I set the timing at idle too at 10 degrees before tdc on the trailer too. I took it to the lake yesterday and it would stall going into gear and out. Once I would get it into gear, it would not rev up. It would only go about 6mph and I tried moving the distributor around and it would not go. Any ideas? also while i was messing with it, I noticed the tranny slipping so I looked and tranny fluid was laying in the bottom of my boat. I went and got some, added it, and it didn't leak any the rest of the time. (I think it came out of the vent) Thanks in advance

I did not check the alignment, when I do, I will get back to you on that.

Thanks for that!

Now that I am thinking about issues, my tachometer seems to jump around a little bit and does not work right. It is a new gauge I put in this winter and at idle it says its at 2000 rpm and it doesn't really move through reving the boat up. Could this be a timing issue and since the timing is messed up, would it make my tach messed up?

Lets not get hung up on alignment issues when the real question was it not running right.
Why did you do the rebuild in the first place? Is the ignition system the same as it was before the rebuild?

I did miss that point, I will loosen the bolts and do the alignment that way, Thanks for all the input I have gotten from everyone as I would like to have this sorted out before July 4th

Where are our Excel experts?? By that time frame '91 were they using right hand engines? By then most SN were using lefty's

It is a RH engine and I have checked the firing order and plugs, all match up. I just did the alignment, and it was already perfect.

Figure 6 matches the numbers on the tag on the engine, and that is the way I have it set, because I had originally thought it was a couple crossed wires.

Gary S wrote: Lets not get hung up on alignment issues when the real question was it not running right.

Let's not get hung up on firing orders as a possible cause of the engine running right.
Gary,
My early thought was since the engine was just dropped in without an alignment it could have caused such a bound up prop shaft that could limit RPM's

Shua4242 wrote: I know the cam is correct as it was an original one with the factory motor

Gary's not saying your cam is wrong.

He's giving you an example of what happened to him with firing order, plug wire mixups, but you've obviously at least double or triple checked all this so it must be something else

Duane in Indy wrote: Shua4242 wrote: I just did the alignment, and it was already perfect.

Duane,
You didn't read the events in the order they occurred. I've done it too!


I brought up the alignment as a possible cause BEFORE he checked it. Then of course Gary has to step in and work me over for even bringing up the alignment!

I installed a Pertronix distributor and coil on my BB chevy and it ran great for about 50 hours. Suddenly I had the same symptoms as you: it would idle and rev with no load but would not accept throttle under load. The problem was a bad Pertronix coil. I changed it for a generic GM oil filled coil and it was back to running great.

I never knew there was a valve in the tank so I will pull the sender and check it. Thanks for the help guys.

Here's a picture anti siphon valve s on the left, the suction tube for the tank is on the right



It's a good time to blow out the suction tube too.