CARBURETOR Repair on Older BRIGGS & STRATTON 3.5HP Engine Part 1 of 2

Thank you so much, first video I’ve seen with vacuum diaphragm. My masport is having issues.

Anybody know the part number for the diaphragm?
Thanks

I just pulled one of these tillers out of the trash. Would you be able to provide the Make and model of yours so I have something to reference please? I know it is a 3.5 horse briggs and that is it. Thanks

I saw another video in which the low spring was on opposite side of the diaphragm, i.e., on the carburetor side. In this video it is on the tank side. Is there some rule relating to this?

Is there a replacement carb and tank for these? I have one that is missing the choke butterfly and won't run. Can not find new carb like the existing one.

After your watch video, my lawnmower is back to running condition again, you are awesome, thanks a lot

Good video

Thanks a million for this. I still have my 1983 Montfield mower with this engine. It had stopped and wouldn’t start and with your excellent video it’s now running better than ever 👍👍

Very nice job depicting and explaining in layman's terms! Thanks

Remove carb. Remove fragile parts like diaphragms. Brush off the bulk of the dirt. Place carb and tank in the wife's dishwasher. Put on HOT POT SCRUBBER MODE. Will come out like new. Rod out jets with fishing line and carb cleaner.

Can you show the location of the linkage springs.

Thanks , mine was stuck to the tank also

Good video.
Where can I get the diaphragm from?

if you still have a carb and fuel tank like this, can you make a new video? I am struggling with mine.

V can you tell me the carburetor kit number great video thank you

I have an old dead lawn mover with exactly the same engine, and the problem was in the points, I discovered that with multimeter, but this video helped me with taking out the flywheel from the axis. So thank you very much, today I managed to start my B&S!

I have what is essentially the same tiller and it needs this done.....Great video.....THANKS!!!

How do you get the spring out the diaphragm since I have to replace the diaphragm

Hi donyboy73!!! Is this your tiller, and if so, do you still got it?
I have watched this video trilogy many times, so i can learn to take care my old Briggs machines, and also because i admire your awsome work.

hi how can i tell model no 1964 5hp briggs carb manual choke thanks

I did not realize you had posted this...I love your videos.

where is part 2?

Thanks mate ! Just followed your vid and my engine started right afrer mounting it back. No works like a charm !!

Where is Part 2?

So i cleaned the carb and gas tank as they were filthy. I put it back on and i still got nothing. Everything seems to kick back like it supposed to. I checked compression and got a little over 60. When i check for spark i cant see any but if i hold it the wrong way i sure can feel it. Do you have to be able to see it? Even in day light?

Hi donyboy73!!! Do you still have that Viking tiller with Briggs engine, and what year model is it? 1973 or in that neighbourhood, right?

4

i did all that and may mower start but stop because may oil is veryyyy black and it is very hard to take out the nut i can,t do it? thanks for all your videos you are one of BESTexplaining the videos

When i prime 2x the gas on my snow blower, i seen gas leak...i opened up the cover thinking i have a broken gas line, which i did not....the gas came out from the opening of the carburator out of a small hole....i watched your videos, does anyone know why this is happening? i heard you say in one of your videos if it is leaking you have to take a gasket out with a wire and face something down..not sure of that name...is that the cause of the leak through the front of the carburetor?

Then blow dry everything with air.

And then what I do, is, ( if the coast is clear), you can rinse everything under hot water, at the kitchen sink.

Dony. A two gallon dip-tank, with kerosene, is what you need, for cleaning those tanks and carbs. And then a gallon of carb cleaner, with the basket, is good for the carbs. Works wonders. I`m surprised your not using those. Otherwise, nice vids.

Dony, do you know if there are still carburetor rebuild kits available for this engine?

I believe my 2002 Craftsman edger uses the same engine. Really, I only need that paper looking diaphragm for the carburetor. I feel as if that's the culprit because I have cleaned everything else out really well.

Same style engine with the fuel tank also filling in as the fuel bowl, with the carb mounted directly to the top of the fuel tank.

Thank you!

I have a engine like this . Problem is the gas tank has a TINY hole. What can I patch it up with?

Thank you for the video, it was a lot of help. My mower has the same carb.

Hello Thanks a lot for the video.
I need to change the gaskets and the diaphragm of my concrete machine which have a Briggs&Stratton 3,5 Hp Horizontal Linkage modele:91232 Type:1363 E1 Code:980513FA. Do you know the numbers for the gaskets and diaphragm kit.
Thank you for your reply.

Thank you for posting this video and part two. It helped me bring an old dead lawnmower back to life.

+donyboy73 what brand gloves are you using??I must have the cheapos.Once carb cleaner hits it.They dissolve.

problem I'm striking on older B&S engines, 80s mostly, with die-cast metal carbs..(I just replaced one an hour ago with another used carb, I used one of the slightly later plastic ones, plastic but no plunger button )is this issue where a highly rich condition develops...the engine starts and runs, but clearly runs -very- rich, a visible soot-smoke discharge from the muffler...when you screw the mixture screw in to full-lean even, right up to the stop, on a carb working properly this would normally lean off so much that it would stall the engine, but when engine has this problem, it is so rich that screwing in mixture screw cannot stall it even...I have seen this condition just on those old metal carbs several times now, exact same symptoms, all I have done is swap carbs to one working ok still, but what specifically causes this, I'd prefer to fix them if fairly easy..

On mine there is a sixth screw hidden in the venturi about 1 !/2" long.So dont be too hasty trying to force the carb away from the tank.

i have 2 of these that i have been working on.  i have cleaned out the carbs very well and replaced the diaphram.  it will run for a second then slowly run out of fuel all while surging, if i spray start fluid toward the intake it picks up or can slow down so i think its a fuel issue.  however with a cleaned carb and new diaphram what else could it be? the tank is clean also, i was wondering if you have seen any of these pick up tubes start leaking at the top where that black sealant is. also i have been working on a couple other engines as well that have a miss (not spark drop), i adjusted and cleaned all spark components and cleaned carbs very well. one is a tecumseh from an early 90's craftsman similar to the eager 1 series and the other is a 5 or 6 hp briggs on a newer toro.  with both these i pulled heads thinking the miss was from leaking compression due to leaking head gasket or bad valve seating. both were full of carbon, i cleaned the heads the best i could. with both the miss got worse after doing this i know one of the gaskets were bad but the other was not. i got a new gasket in for the toro and i am going to try it again.  any chance my miss could be related to valve seat issues if the head was full of carbon? your videos have helped me on occasion when i get stumped and are always very informative and i do alot of small engine repair but this is still my weak point is this miss unrelated to spark of fuel. any help on these issue would be greatly appreciated, or at least maybe common issues you have seen that cause a miss unrelated to spark or fuel. thanks!

Shouldn't you use a wrench for the bolts not a rachat

Many many thanks for posting this video.
I have a 1974 Mountfield M3 mower (with a Briggs & Stratton engine) which had lain unused for the last 7 years, because it was impossible to start.
Courtesy of your tuition, I had the courage to remove and clean out the fuel tank and carburettor.
My M3 now runs almost like new. (Only "almost" probably because it is now impossible to obtain the correct fuel for this engine ---- i.e. 4-star leaded. But at least it DOES run on 2-star unleaded, with a little squirt of Redex !!).
Thanks once again ..............

ok..

could you sometime do a video to trace the flow of gas from the tank to the throat of the carb in a pulsa jet carb?...thanks...

how do you clean the screens of the long and short tube?...

dony, can a ignition coil cause a lawnmower to surge, and eventually shut off when the engine gets HOT?...

Some times it will blow gas back out of the gas tank .when it is hot .

I even put in carburter cleaner in it also .