PLEASE HELP (3.5 B&S Carb)

[ChrisMac]

IT LIVES ! (Formerly: "Please please help (3.5 b&s)" )

This is how this was hooked up when I got the kart. I know it is not right, but I'm not sure how it is supposed to be laid out. Where does the linkage and spring from inside the engine go? What does the linkage from the bottom of the tank to the carb do?

Any help or diagrams on how the linkages are supposed to be hooked up would be VERY helpful.

 

[motor_head]

that how they are stock.
just hook a cable up were that bolt with the hook on the end is. i wouldn't bother removing the gov, it won't blow apart be cause it's the air vane style. it's cruise control

 

[ChrisMac]

that how they are stock.
just hook a cable up were that bolt with the hook on the end is. i wouldn't bother removing the gov, it won't blow apart be cause it's the air vane style. it's cruise control

Isn't the part on the top of the carb the throttle? Should the throttle cable be hooked there? When I got the kart, the cable was hooked down below the tank and actuated the rod hooked to the lever below the small spring. But near as I can tell that lever with the threaded rod section does absolutely nothing. It pivots, but does not seem to actuate anything.

Does anyone have a detailed pic of a carb like this that is all hooked up and running. This kart will not run off anything but a shot of starting fluid. I'm sure that the linkages and rods hooked up won't get me running, but at least when I do figure it out this will be one less step that I have to figure out.

AAAAAAAAHHHHHHHHH!

 

[motor_head]

ok i missed the rod that goes down below the tank that sounds like it's hooked up right it you want to keep the gov. what the pivoting arm does is it changes spring tension so the motor will rev higher or lower when its running the reason it doesn't move anything when it not running is because there's a vane under the shroud and when it's not running there's no air blowing on it to push against the spring.
governors can be a little difficult to understand but once you get them figured out there easy

if it only start's when you put starting fluid in it you need to clean the carb

 

[ChrisMac]

What about the rod that is running from the throttle bracket to the flywheel? Isn't that where the throttle cable should be hooked up? If the throttle cable goes to the upper bracket, where should the rod from the flywheel go? Also, there is another bracket underneath the tank that the vertical rod (underneath the spring) goes to. The previous owner had the throttle cable hooked to that. What should be hooked up down there? I could post a pic of that area if that will help.

Sorry for being such a pain.

 

[fowler]

is that rod the governer

 

[ChrisMac]

OK. Pretty sure that I have got all of the rods and linkages in place, I replaced the base gasket and the diaphragm, cleaned every little port and hold in the carb with a half a can of carb cleaner, and this thing will still not run on anything but a shot of starting fluid ! ! ! What am I missing???

 

[motor_head]

the rods are hooked up right as they are. your sure it's getting fuel? pull it over several times and see if the spark plug is wet.

 

[ChrisMac]

Not getting fuel to engine. Getting fuel to "bowl" in the tank, but not up through the carb.

 

[ChrisMac]

Should this still be able to run if I do not have the governor hooked up?

Also, there are two wires coming from the engine. One runs to a push button on the seat (shut off ?) and the other runs to a spade connector at the base of the governor (under the tank). Are these correct? The push button only has the one wire going to it and it is screwed to the bar.

 

[motor_head]

unhook the wire that goes to to gov it just makes it shut of when you bring the throttle all the way back to idle then try it

 

[ChrisMac]

Still no vroom vroom ! Worked on the frame instead today. Got it stripped and in primer. Maybe I should just get another larger hp engine.

 

[DirtTrackRacer_07]

the two wires coming out of the motor are the kill wires when they become grounded out you wont have any spark but if it will run on starting fluid you got spark and you got air so you ant gettin fuel. your picture didnt show the fuel tank but im guessin its the deep style tank. there should two tubes comin down out of the carbuetor down into the tank one of or both might be stopped up with a little piece of trash if i can remeber correctly one has a filter at the end of it and one dont ive seen all kind of crap get up in the tubes even with the filter and if you do got the big tank make sure that one of the tubes is twice again longer than the other one it has a sliding tube that goes up on one of em they can be a pain sometimes sorry for such a long post

 

[ChrisMac]

the two wires coming out of the motor are the kill wires when they become grounded out you wont have any spark but if it will run on starting fluid you got spark and you got air so you ant gettin fuel. your picture didnt show the fuel tank but im guessin its the deep style tank. there should two tubes comin down out of the carbuetor down into the tank one of or both might be stopped up with a little piece of trash if i can remeber correctly one has a filter at the end of it and one dont ive seen all kind of crap get up in the tubes even with the filter and if you do got the big tank make sure that one of the tubes is twice again longer than the other one it has a sliding tube that goes up on one of em they can be a pain sometimes sorry for such a long post

That is exactly the set up I have got. I have removed the carb and cleaned the longer tube from the inside out and carb clean flows through it well. The shorter tube that sits in the "bowl" seems to be the problem I think. I am getting fuel into the "bowl" but it doesn't seem to be getting beyond that. I do not see a good way to clean that shorter pick up tube. Is there a trick?

Oh, by the way, Happy 4th of July!

 

[DirtTrackRacer_07]

i dont think so but i am not for sure i have tiller motor that had the same setup so i went and took the tank and carb off to see if i could find any easier way to clean it. the little left side cover that unbolts with spring and diafram inside is the fuel pump that pumps fuel from the tank through the long tube into the "bowl"so your good there. when i looked at it i guess the only way to clean the jet in the shorter pickup tube would be with some compressed air and blow through there or if you have any torch head cleaners use one of the smaller ones to get up in there. i use them at work to clean the idle jet in four wheeler carb and they are tiny so they should work and they wont bend eithier. also take the fuel mixture screw out blow some air through that when you got it all apart there has got to be something in that jet cause thats the last step before hittin the carb venture i believe

 

[ChrisMac]

I'll give it a whirl!

 

[solomon]

These carbs can be hard to clean for an inexperience briggs user. Hows the diaphragm?

 

[ChrisMac]

These carbs can be hard to clean for an inexperience briggs user. Hows the diaphragm?

I am an inexperienced briggs user. The diaphragm is brand new, and I am getting fuel into the bowl in the tank.

 

[ChrisMac]

While I am waiting for the vinyl for the seat and tube pads, I figured I'd play with the 3.5 a bit on the bench.

Pulled the carb (again) and found the smallest sewing needle I could find in my wife's sewing kit. Slowly and gently worked into the second p/u tube from the bowl in the tank. As I said, slowly but surely it made its way into the tube. Only an 1/8 of an inch to start, but eventually I was able to work it enough to get the entire needle into the tube. It was definitely clogged up with something or other. Bolted everything back up, one shot of starting fluid and WHAMMO! She runs like a champ. Now just to get it all bolted back up and buy a new chain.

Thank you all for so much help and advise on this little project. It is greatly appreciated!

 

[DirtTrackRacer_07]

i wouldnt of thought of sewing needles good idea when you get the motor bolted back down and everything ready to roll get some pics of it up and another word of advise on them little motors now that you got it runnin try to get some non ethonal gas for to run in itand hogh grade gas to if that ethanol gas sitts in there for a couple days you will have to do the whole thing over again that ethanol gas is the worst thing made yet in my opinoin has anyone else had any problems with it jelling up after it sitts a while?? just wonderin im not sure if you can get or not but if you cant go for some 112 race fuel they run better on that anyway but its almost 7 dollars a gallon here buts its worth it lol