How To Fix Briggs & Stratton Flat Head Engine From Surging / Hunting | Carburetor Cleaning 

I bought an old tiller with this motor on it that was surging and running badly. I just put a new ebay carburetor on it and it runs better,but still surges. Could the governor need adjustment, or do you know what else I could do? I used new gaskets and fresh 89 octane fuel.

who the fuck care about buying new stuff when the point is to fucking repair the problem ? ... damn boomers

@@ciphercode2298 Did you get it to run any better yet ? mine is doing the same thing.

robertson mine has what they called a pulse jet( I think) carburetor on it. It bolts directly to the steel tank and draws fuel up its tube and puts it into a bowl built into the tank and then it can draw it into the motor. On mine the bowl was rusted out. I tried cleaning it up and using jb weld, but it's full of pin holes and the fuel drains back into the bottom of the tank. I couldnt find a suitable replacement tank. I ending up getting a 6.5hp predator engine from harbor freight. I had to Biden out my mounting holes and redo the way the tension pulley mounts. The surging is a sure sign of a lean running condition or faulty governor. I did check my governor and it was adjusted properly.

@@ciphercode2298 Thank you very much i will check it out tomorrow.

Where did you buy rebuild kit?

@@tigerwatts2537 menards

on my engine the screw will just suck itself back in if it is unscrewed, even on a brand new carb.

Just checked head on motor and did not have dual spacing so could not use that carb.. I already robbed the fuel pickup filter for another tiller and wondering if I could just put some hose and drop a stone style filter like on a weed eater into tank instead.. then have a better filter I could change.. anyone try that?

Replace that gasket along with the spring and spring cap like this video here - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WhpYKlufwko.html

@@Fentertainment Thanks, will do.

The diaphragm is a fuel pump. It moves fuel from the tank to the little cup directly under the short pickup tube. Without fuel in that cup, they are a bear to start.

@@mrunit7261 I figured this out after messing with this thing for a week. Practically rebuilt the thing trying to figure it out. It was the bowl... bone dry =]

same with mine

@@ethan5.4s89 I figured out the issue. The fuel tank has a fuel bowl integrated into it, mine had a slight rust hole so you need to figure out a way to patch that hole so it can get a constant supply of fuel without draining

me too, did you ever fix yours?

@@josewales892 Sure did Bill , i wasn't able to fill my fuel tank all the way because my gas cap was leaking pretty bad so i ordered me a new gas cap and filled my tank up all the way and it run like a new one after that.

@@jackierobertson1528 i’ll have to take a look at that, i put on a new fuel line and it keeps getting air in it, i used a clear line so i could see but i pull line and bleed till it’s all fuel then pop it back on and start and within a few minutes it has air bubbles in the line again

might have to adjust the air/fuel mixture screw

@@Fentertainment I'll fiddle with it some tomorrow, but I've got a feeling it's not gonna fix it. Seems strange that both carbs run basically the same. There was some rust in the tank and the guy I bought it from said he rebuilt the carburetor. When I removed it he'd taken the screen off the bottom of the pump and it'd sucked up all kinds of debris. I cleaned the tank out with vinegar while I was waiting on my new carburetor to arrive.

@@ciphercode2298 Those old briggs tanks are notorious to rusting and if the carburetor did get any rust in the carburetor then it could obstruct fuel. I have a tank here that my neighbor tried to use vinegar in but the tank was too far gone before he did that. I looked for a used tank on ebay but he didnt want to pay those prices.

@@Fentertainment mine wasnt real bad. Probably woulda been ok if he hadn't taken the screen off the bottom of the pickup tube. Looked like they'd left the tiller just sitting out in the open all the time. I'll get it figured out,its just frustrating not knowing which direction to take. I dont mind fixin stuff,as long as I can diagnose the problems.

@@ciphercode2298 If you have the tank off then just get all the rust out that you can and then use a tank sealer like Red Coat. It will seal any rust spots and bind them so no more particles come off and clog any of the ports.