Anyone got some input. Trying to start video.

[Hogger54]

Trying to start it again.(235 with 12v conversion and HEI distributor)
Just doesn't want to catch. Can you guys hear or see something that I should check?
The rattling you hear in the video is my daughter riding her scooter.

http://youtu.be/CZrHdpF2A6k

I can't seem to embed it, sorry.

[Jyman]

from listening to it run it almost sounds like your timing is off a lot, or its not pulling the fuel into the engine.

[mr48chev]

It sounds like it needs a new starter drive/bendix (depending on where you live) as that one is kicking out.

I can't tell about the fuel or timing at this point.

[OrrieG]

I agree with the bendix, that was the same issue I had last weekend. Would not stay engaged long enough for the engine to catch. New starter and it kicked on the first hit. Get it so it will turn a few revolutions and let us know what happens. Nice looking engine.

[Hogger54]

Yep, you guys were right. I took the starter back to my starter guy and he ran a different test. There is a type of clutch(for lack of the right term) on the drive gear. And it quits spinning when it goes bad, with too much resistance.
So now I'll get a new drive gear, and try it again. Hopefully next week.

[OrrieG]

One problem solved...looking forward to seeing if it fires...

[DransportGarage]

How are you getting 12V to the distributor primary? I assume you haven't hooked up a ballast resistor, but let us know.

[Hogger54]

GOT IT TO START!!!
So I'm thinking maybe the timing is just off a bit? What do you guys think?

http://www.youtube.com/watch?v=TFkU9QcHQzM

[OrrieG]

Hard to say, might be the balance between the two carbs, small vacuum leak, timing, etc. Did it idle or did you have to keep goosing to to stay running (choke issue??). I'd get a vacuum gauge on it and play with the timing first, that will take care of that and show any vacuum issues. Then fiddle with the carbs to see if you can find a sweet spot. I have never delt with a multi carb engines you might check over at inlinners.org to see if they have any tips.

[Hogger54]

OK, new dilemma. After trying to start it again, and having it run a little, I do have to gas it.
I noticed the rear header was getting warm, but the front header was still cold...
Also, before starting it, I look down into the carbs, and when I open the throttle I can see fuel going into the rear carb, but not the front...

I rebuilt both carbs. So I'm guessing no fuel into the front carb = nothing to burn, so no hot exhaust.
What allows fuel to spry into the carb when the throttle is opened? Is it the accelerator pump?

[OrrieG]

Make sure you are getting fuel to the bowl.

Accelerator pump give the engine a shot of fuel for starting since without engine running there is no venturi effect thru the carb to pull fuel thru the port. Also use to add fuel when rapid acceleration opens the carb so fuel air ratio stays the same. Once running the carb pull air usually from two ports, one for idle, one for off idle.

If you have fuel in the bowl and no squirt to start, the the accel pump is bad, but one it is running off of the other carb, it should draw fuel thru the ports. If not then something is plugged up from crud in the fuel or poor cleaning during rebuild.

A quick check would be to get it started and shoot a shot of starter fluid in the dead carb, you will tell right away if it helps the performance. I do not every recommend dribbling gas on a running engine.

[Hogger54]

Just tried starting it, and shot some starting fluid in the dead carb. It backfired.
Gotta run to work, I'll check the bowl tomorrow.

[OrrieG]

Guess the spark travels up the intake faster than the vapor can get sucked into the combustion chamber. Are both carbs going into one manifold chamber or is is separted front and back? If it is all one, some of the fuel mix from the good should find its way into the all the pistons, it just might be real lean, but would run all six. If separated then no fuel to half the engine if one carb is bad. If it is all one and part of exhaust is cold, could be electrical.

[DransportGarage]

Here's a shot in the dark, but it's an easy thing to check. Take a second look at the firing order: 1-5-3-6-2-4, clockwise. If the front cylinders are firing but not on compression the pipe will be colder than the ones that are firing on compression. It sounded like it was running on about 3 cylinders.

It could still be a carb problem though, and other tips here are good ones. I had a clogged passage in a carb once that restricted the shot of gas from the accelerator pump.

Neat setup, by the way!!

[Hogger54]

I thought of that too, and went back twice to check the plug wires.
I'll try and get to opening up the carb tomorrow and see if I can't fix this.

I have 12v going from the battery to the main post on the starter. Then from the starter I have a 10g line going to the distributor, with a switch mid line so that I can cut power to it to stop the engine.

Thanks

[DransportGarage]

Originally Posted by Hogger54

I thought of that too, and went back twice to check the plug wires.
I'll try and get to opening up the carb tomorrow and see if I can't fix this.

I have 12v going from the battery to the main post on the starter. Then from the starter I have a 10g line going to the distributor, with a switch mid line so that I can cut power to it to stop the engine.

Thanks

Yeah, it sounds like you've got pretty good troubleshooting skills. If you get desperate you can always bolt on a stock manifold & carb to see if the prob goes away.

[Hogger54]

So I have fuel in the bowls. When I open the throttle, fuel comes out of the little hole in BOTH carbs, where the arrows are pointing in the first pic.



Now this is the only thing I can see that's different. If you look at the hole where the arrow is pointing, there is just a hole. BUT, on the carb that wasn't getting fuel, there is a small nipple, or tube that is sticking out of that same hole(picture coming soon). Could that be the issue, maybe it's somehow blocking the fuel flow.

[Hogger54]

Here's the two different parts I was talking about.

[Hogger54]

So I swapped the tops, and the front carb still isn't spraying fuel.

Now what should I look for?

[Hogger54]

FOUND IT!!
Hopefully this can help someone in the future.
There is a tiny little hole that the arrow is pointing to. A little word of advise, make sure this isn't plugged.

[mr48chev]

Good enough. Now lets see that video of it running.

[OrrieG]

Ah-ha! Not to be critical, but for being rebuilt the inside of the throat looks pretty black and crinkley, or is that just from the recent back fires?? I ordered my new carb today, tired of trying to get old crap to work....

[Hogger54]

I had it nice and clean. must be from the backfiring. I think it might look darker in the picture, than what it really is.
Got it to start. Purrs nicely. But now my temporary fuel set up isn't pumping. I think it's an air leak from when I switched to a stiffer tube.

[OrrieG]

Good news. Now on to the next challenge....

[Hogger54]

There it is. Still got a few bugs to work out, but I don't think they are anything too serious.
On to some cab rust repair.

http://www.youtube.com/watch?v=MDMk3o3o9Ow