35 big twin carb. flooding?!?!?!

[pwrcrzy]

Hello,
Me again, seems like I have gotten the points/coils right. I've had it running but it keeps flooding, to the point that the gas runs straight out of the front air housing. I have taken the carb apart, replaced the needle and seat and set the new float. It started, shut down, tried to start and flooded. I tapped on the carb to set the needle and seat assembly, now still keeps flooding when I am trying to start it. There is a lot of pressure in the tank when I let it out. Does anyone have any suggestions? Also to make sure I got it right, I turned the high side needle in and out one turn and the low side back out one and a half to begin. Is this right to start with? The high side was about three turns out to begin with. Hopefully I can get this beast running good again. To fill everyone in I just bought the boat, took it out and it idled great but was rough and would not accelerate. I replaced the points, coils, condensers and plugs. It seems as if the advance is working well It started after that, but now I'm knee deep in fuel? I am not working with a manual, dumb I know, but any help is greatly appreciated.
HELP< HELP

 

[samo_ott]

Re: 35 big twin carb. flooding?!?!?!

If gas is coming out the carb then the float and needle valve aren't closing for whatever reason. Did you set the float when you changed the needle valve? It needs to be horizontal when upside down. Also, when you take it apart blow in the fuel in line. Do you hear air escaping anywhere? (or used compressed air), that's a sigh also.

 

[pwrcrzy]

Re: 35 big twin carb. flooding?!?!?!

I'm gonna try to inspect the needle and seat again. I did do just as you say when I initially set it. I have been outside running it by letting the pressure escape from the tank and boy it wants to run so bad. It was doing great at higher rpms but still flooding at idle without letting the pressure off, I guess of the difference of fuel consumption. Could I have some sort of problem with the pressure system? Too much pressure on the needle?

 

[tashasdaddy]

Re: 35 big twin carb. flooding?!?!?!

float not closing if gas is dripping out. i've used these directions, they are the best.

(Carburetor Adjustments - Two Adjustable N/Vs)
(J. Reeves)

Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.

Setting the high and low needle valves properly:

NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle va /lve adjustment.

(High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, wating for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.

(Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

 

[pwrcrzy]

Re: 35 big twin carb. flooding?!?!?!

HOT DOG!! This baby wants to go out for a run. Went through the needle seat again, nothing different, but it is seating now. It runs great, I need to get it to the water to run it and make final high steeing speed adjustments. It kinda has a mid rpm hestitation and picks up great at full throttle. Is there any adjustment on the breaker plate? It seems to be rotating but at idle, pushing the plug wires back seems to idle it up and smooth it out a bunch.

THANKS to everyones help sam and tashasdaddy!!!!!!!!!

This site is A++++++

 

[tmcalavy]

Re: 35 big twin carb. flooding?!?!?!

All it takes in one tiny piece of crud to keep the needle from seating. Follow the high and low speed adjustment directions already given, on the water, and report back. Not sure what you mean by "pushing the plug wires back?" If you mean wiggling/moving the wires by hand improves how it runs, you may have a wire getting ready to go bad. Firing it up at night will show you real quick if you have any cracks/arcing in the wires. Adjusting the high and low speed needles may eliminate the mid-range hesitation.

 

[tashasdaddy]

Re: 35 big twin carb. flooding?!?!?!

agree.

 

[Sea18Horse]

Re: 35 big twin carb. flooding?!?!?!

I agree but I think I would just get a set of plug wires and change them anyway if they are at all questionable. If wriggling the wires around changes the way it runs that's a pretty sure sign that they're bad. They may be deteriorated at the point where they clamp to the under side of the mag. In which case you might not be able to see anything even at night. That may very well explain the hesitation in the midrange too.

There is a link-n-synch procedure that you'll want to do if you haven't already. On that one you just need to check that the throttle blade in the carb just begins to move at the moment when the cam roller is aligned with the hash mark on the cam.

Cheers..................Todd